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Articles 391 - 420 of 788
Full-Text Articles in Materials Science and Engineering
Using Shrimp Shells As Based Catalysts For Fame Production From Palm Oil Feedstock, Assadaporn Poonanan, Anupat Prukpaiboon, Paul Egwuonw Dim, Mutsee Termtanun
Using Shrimp Shells As Based Catalysts For Fame Production From Palm Oil Feedstock, Assadaporn Poonanan, Anupat Prukpaiboon, Paul Egwuonw Dim, Mutsee Termtanun
Journal of Metals, Materials and Minerals
In this study, waste shrimp shells from industry were used as a heterogeneous bio-based catalyst for trans-esterification reaction of fresh palm oil. CaO was prepared from shrimp shells calcination. Surface area, phase composition, and basicity of the calcined shrimp shell catalysts were studied using N2 adsorption (BET), X-ray diffraction (XRD), and CO2 temperature-programmed-desorption (CO2-TPD), respectively. The influence of shrimp shells calcination temperature and operation condition, methanol to palm oil ratio on trans-esterification reaction, were investigated. Five hours trans-esterification was carried out at 65℃ using different shrimp shell at four different calcination temperature: 700, 750, 800 and 850℃ with 9:1 methanol …
Investigation Of Deposition Parameters On The Structural Properties And Hardness Of Tialn Films Deposited Via Reactive Pulsed Dc Magnetron Sputteringinvestigation Of Deposition Parameters On Structural Properties And Hardness Of Tialn Films Deposited By Reactive Pulsed Dc Magnetron Sputtering, Jariyaporn Rukkun, Kamon Aiempanakit, Pimchanok Reakaukot, Witthawat Wongpisan, Kirati Waree, Montri Aiempanakit
Investigation Of Deposition Parameters On The Structural Properties And Hardness Of Tialn Films Deposited Via Reactive Pulsed Dc Magnetron Sputteringinvestigation Of Deposition Parameters On Structural Properties And Hardness Of Tialn Films Deposited By Reactive Pulsed Dc Magnetron Sputtering, Jariyaporn Rukkun, Kamon Aiempanakit, Pimchanok Reakaukot, Witthawat Wongpisan, Kirati Waree, Montri Aiempanakit
Journal of Metals, Materials and Minerals
In this work, titanium aluminum nitride (TiAlN) films were deposited on a silicon substrate via reactive pulsed DC magnetron sputtering. The effect of deposition parameters such as nitrogen gas flow rate, substrate temperature, and bias voltage on the structural and mechanical properties of TiAlN films was investigated. The crystal structure, morphology, and hardness of TiAlN films were characterized via X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM, and nanoindentation. An improved crystallinity of TiAlN films was obtained by varying the substrate temperature and bias voltage. The morphology of the TiAlN film exhibited a columnar structure, and the morphology gradually …
Improving Corrosion Resistance Of 3d Printed Ti-6al-4v By Tin Coating, Surada Nisaimun, Phitsanu Poolcharuansin, Patama Visuttipitukul, Pitichon Klomjit
Improving Corrosion Resistance Of 3d Printed Ti-6al-4v By Tin Coating, Surada Nisaimun, Phitsanu Poolcharuansin, Patama Visuttipitukul, Pitichon Klomjit
Journal of Metals, Materials and Minerals
TiN thin films were deposited on biomaterial 3D printed Ti-6Al-4V substrates using two methods including direct current magnetron sputtering (DCMS) and high-power impulse magnetron sputtering (HiPIMS). The coating times were compared between 5 min and 25 min. HiPIMS was developed based on DCMS by increasing degree of ionization in plasma and power densities in the order of kWcm-2 compared to Wcm-2 of DCMS. The film characteristics and mechanical properties were investigated by glancing incident x-ray diffractometer (GIXRD), field emission scanning electron microscope (FE-SEM), and atomic force microscope (AFM). Electrochemical behavior was analyzed by electrochemical impedance spectroscopy (EIS) in 1 M …
Characteristic Of Fluorescence Spectroscopy Response Of Tetrakis (4-Sulfonatophenyl) Porphyrin Doped Polyaniline Toward Fe3+ Ion, Chatr Panithipongwut Kowalsk, Meatawadee Buntee, Prasit Pattananuwat
Characteristic Of Fluorescence Spectroscopy Response Of Tetrakis (4-Sulfonatophenyl) Porphyrin Doped Polyaniline Toward Fe3+ Ion, Chatr Panithipongwut Kowalsk, Meatawadee Buntee, Prasit Pattananuwat
Journal of Metals, Materials and Minerals
Here, we report a selective colorimetric chemosensor toward Fe3+ ion detection by the combination of sensitizer and hole transport consisting of polyaniline and tetrakis (4-sulfonatophenyl) porphyrin. Interestingly, the presence of tetrakis (4-sulfonatophenyl) porphyrin moiety on polyaniline can enhance the optical limiting properties of polyaniline, allowing the fluorophore signal for chemical sensor. The performance sensing behaviors toward metal ion are observed by the ultraviolet-Visible and fluorescence properties. The sensing of polyaniline-tetrakis (4-sulfonatophenyl) porphyrin toward Fe3+ ion exhibits a linear response in the concentration range of 0.01 M to 1.0 × 10-4 M over the other transition metals (Cu2+, Ni2+, Zn2+, Pb2+, …
The Study On Un-Doped/Boron Doped/Un-Doped Triple Seg In Vertical Nand Flash Memory, Woong Lee, Chaeho Kim, Joonsuk Lee, Sehun Park, Yonghan Roh
The Study On Un-Doped/Boron Doped/Un-Doped Triple Seg In Vertical Nand Flash Memory, Woong Lee, Chaeho Kim, Joonsuk Lee, Sehun Park, Yonghan Roh
Journal of Metals, Materials and Minerals
Selective epitaxial growth (SEG) plays a critical role in vertical NAND flash memory because it serves as a ground select line (GSL) transistor, which is used to control the cell current in the vertical channel. In this study, different channel hole sizes between the adjacent hole and away hole from the common source line (CSL) were detected after vertical channel etch (VCE). This discrepancy severely impacts the boron concentration of SEG applied through ex-situ boron implantation, and results in large GSL Vth variations. Novel in-situ boron-doping of triple-layered un-doped/boron doped/un-doped SEG was developed to solve the high variation of the …
Microwave-Assisted Ecofriendly Silver Nanoparticle Synthesis By Varieties Of Chrysanthemum Morifolium Ramat: Assessing Their Antioxidant, Photocatalytic And Antibacterial Activities, Mathivathani Kandiah, Laknee Nawamali De Silva
Microwave-Assisted Ecofriendly Silver Nanoparticle Synthesis By Varieties Of Chrysanthemum Morifolium Ramat: Assessing Their Antioxidant, Photocatalytic And Antibacterial Activities, Mathivathani Kandiah, Laknee Nawamali De Silva
Journal of Metals, Materials and Minerals
Based on recent developments in the field of Nanobiotechnology, this study is aimed at the assessment of antioxidant, photocatalytic and antibacterial activities of silver nanoparticles (AgNPs) synthesized using Chrysanthemum morifolium Ramat varieties (brown, yellow, purple, pink, salmon pink and white), where five varieties produced AgNPs except white. Antioxidant assays such as total flavonoid content, total phenolic content and total antioxidant capacity and free radical scavenging assays such as ferric reducing antioxidant power and DPPH radical scavenging assays were performed. Photocatalytic activity was assessed by the degradation of the model dye methylene blue. Anti-bacterial activity was determined on Staphylococcus aureus and …
Improvement Of The Superconducting Properties Of Carbon Addition On Bi1.6pb0.4sr2 Ca2cu3o10+Δ Prepared Through The Two-Step Sintering Process, Dini Rizqi Dwikunti Siregar, Sigit Dwi Yudanto, Septian Adi Chandra, Eka Feby Ronauli Lubis, Syahrul Humaidi, Nono Darsono
Improvement Of The Superconducting Properties Of Carbon Addition On Bi1.6pb0.4sr2 Ca2cu3o10+Δ Prepared Through The Two-Step Sintering Process, Dini Rizqi Dwikunti Siregar, Sigit Dwi Yudanto, Septian Adi Chandra, Eka Feby Ronauli Lubis, Syahrul Humaidi, Nono Darsono
Journal of Metals, Materials and Minerals
The effects of the addition of carbon nanoparticles and nanotubes on the Bi1.6Pb0.4Sr2Ca2Cu3O10+δ (BPSCCO) have been reported. BPSCCO samples were synthesized using the sol-gel method. BPSCCO with nominal composition was sintered at 840°C for 30 h, then grounded and added an amount of carbon. Pure and carbon added BPSCCO were sintered at 840°C for 30 hours. Resistivity measurements were carried out to determine the superconducting properties of the samples. We found that the addition of carbon nanoparticles and nanotubes increased the critical zero temperature (Tc-zero) of BPSCCO from 94.67 K to 97.8 K and 102.03 K for the pure BPSCCO, …
Stress Softening Characteristics Of Thin Monoholar Rubber Flat Slab, Kulyuth Boonseng, Chatchai Waiyapattanakorn, Prayoon Surin
Stress Softening Characteristics Of Thin Monoholar Rubber Flat Slab, Kulyuth Boonseng, Chatchai Waiyapattanakorn, Prayoon Surin
Journal of Metals, Materials and Minerals
Thin monoholar rubber flat slab gives rise to unconventional mechanical properties under tension loading not found in thin solid rubber flat slab. However there has been no proper report on its stress softening characteristics. Stress softening is an important phenomenon occurring in all elastomeric materials under cyclic tension loading. Parameters pertinent to stress softening investigated in this research are stress-strain characteristics, permanent set strain and hysteresis loss energy of the thin monoholar rubber flat slab in comparison with the thin solid rubber fat slab when undergoing 7 cycles of stretching. Noticeable differences of stress-strain hysteresis loops diminution of the thin …
Photoelectrochemical Cathodic Protection Of Amorphous Zinc Oxide Coating On Hot Rolled Steel Ss400 In A 3 Wt% Nacl Solution And A Na2s-Naoh Solution, Phatchara Wipataphan, Worapot Sripianem, Naw Blessing Oo, Thanate Na Wichean, Boossayamas Dachbumroong, Oratai Jongprateep, Gasidit Panomsuwan, Naray Pewnim, Ratchatee Techapiesancharoenkij
Photoelectrochemical Cathodic Protection Of Amorphous Zinc Oxide Coating On Hot Rolled Steel Ss400 In A 3 Wt% Nacl Solution And A Na2s-Naoh Solution, Phatchara Wipataphan, Worapot Sripianem, Naw Blessing Oo, Thanate Na Wichean, Boossayamas Dachbumroong, Oratai Jongprateep, Gasidit Panomsuwan, Naray Pewnim, Ratchatee Techapiesancharoenkij
Journal of Metals, Materials and Minerals
The photoelectrochemical cathodic protection of amorphous ZnO thin-film coating on hot rolled steel SS400, in the 3 wt% NaCl environment, was investigated. The ZnO thin film was coated on a SS400 substrate at 200℃ using the spray pyrolysis technique. The x-ray diffractometry analysis confirmed the amorphous ZnO coatings. Two different types of the electrochemical cells were used: a single-cell and a double-cell system. Two different types of the photoelectrolytic solutions were compared: (i) 0.1 M Na2S + 0.2 M NaOH and (ii) 3 wt% NaCl solution. The ZnO-coated SS400 samples were subjected to potentiostatic polarization testing under dark and UV …
Influence Of Graphite Feedstock On The Characteristics Of Silver-Decorated Graphene Oxide And Antimicrobial Property, Ebrahim Mahmoudi, Wei Lun Ang, Gasidit Panomsuwan, Oratai Jongprateep, Abdul Wahab Mohammad, Law Yong Ng, Muneer M. Ba-Abbad
Influence Of Graphite Feedstock On The Characteristics Of Silver-Decorated Graphene Oxide And Antimicrobial Property, Ebrahim Mahmoudi, Wei Lun Ang, Gasidit Panomsuwan, Oratai Jongprateep, Abdul Wahab Mohammad, Law Yong Ng, Muneer M. Ba-Abbad
Journal of Metals, Materials and Minerals
Graphite from different sources has significant influence on the properties of graphene oxide (GO) and reactivity of GO towards further modification with other nanoparticles. However, such effect has not yet been properly explored. This study aims to investigate the characteristics and antimicrobial property of GO decorated with silver nanoparticles (known as Ag-GO composite) where the GO is synthesized via modified Hummer’s method from various graphite feedstock, namely natural graphite flake (NGF), natural graphite powder (NGP), and synthetic graphite powder (SGP). The Ag-GO nanocomposite was then synthesized using chemical reduction methods. Antimicrobial properties of the Ag-GO were tested using the standard …
Preparation Of A Mixed Al/Sc Nano-Oxide Derived From The Bauxite Residue (Red Mud) Via The Sulfuric Acid Roasting–Leaching–Precipitation Process, Razieh Habibpour, Eslam Kashi, Mehdi Janfada
Preparation Of A Mixed Al/Sc Nano-Oxide Derived From The Bauxite Residue (Red Mud) Via The Sulfuric Acid Roasting–Leaching–Precipitation Process, Razieh Habibpour, Eslam Kashi, Mehdi Janfada
Journal of Metals, Materials and Minerals
In this study, three methods were used and compared for the selectable extraction of aluminum/ scandium with the least amount of iron in red mud (RM) samples from the Iran alumina plant in Jajarm as follows: 1) RM direct acid leaching with H2SO4, 2) RM washing with hydrochloric acid and oxalic acid before leaching with H2SO4, and 3) RM sulfuric acid roasting-leaching-precipitation. The aim was to extract the highest amount of scandium while preventing the leaching of other metals, especially iron. Due to any discriminative features, the selective separation of Al/Sc with …
Interface Characterization In Tungsten Fiber/Zr-Based Bulk Metallic Glass Matrix Composite, Mohammad Ammar Mofid, Mostafa Jafarzadegan
Interface Characterization In Tungsten Fiber/Zr-Based Bulk Metallic Glass Matrix Composite, Mohammad Ammar Mofid, Mostafa Jafarzadegan
Journal of Metals, Materials and Minerals
In this research, Zr55Cu30Al10Ni5 bulk metallic glass (BMG) alloy is used as the base material to form tungsten fiber reinforced BMG composites. The composites are synthetized using melt infiltration casting method and their microstructure and compressive properties are investigated. Two different infiltration times of 10 min and 15 min are used to produce the composites. The microstructural evaluation of the interface between tungsten fiber and BMG matrix reveals that a narrow reaction band emerges between the tungsten wires and BMG alloy. Some portions of this layer are broken into the fine Zr/W-rich particles …
Magnetic Sensors And Geometrical Magnetoresistance: Areview, Abdelfattah Mohammed Mansour
Magnetic Sensors And Geometrical Magnetoresistance: Areview, Abdelfattah Mohammed Mansour
Journal of Metals, Materials and Minerals
Magnetic sensing devices are of the extremely significant kind of detectors, that are used several important and useful applications. Geometrical extraordinary magnetoresistance (EMR) is thegeometrical kind of magnetoresistance associated with the non-magnetic semiconductor-metalhybrid structure and influenced by geometrical shape. As a result of Lorentz force, the current path change from metal (in absence of magnetic field) to semiconductor (under the subjection of themagnetic field) in semiconductor-metal hybrid structure is the key of EMR phenomena, i.e. once the metal is placed in a semiconductor, it works as a short circuit with the majority of applied current moving through metallic inhomogeneity and …
Quenched And Tempered High Strength Steel:A Review, Gadadhar Sahoo, Krishna Kumar Singh, Vinod Kumar
Quenched And Tempered High Strength Steel:A Review, Gadadhar Sahoo, Krishna Kumar Singh, Vinod Kumar
Journal of Metals, Materials and Minerals
Quenched and tempered steel are broadly classified as low alloy conventional grades with C contentof 0.15-0.40% and tool steels with C content as high as 2% alloyed with strong carbide forming elementssuch as Cr, V, Mo etc. in the range of 1-12%. In both the cases, steels are used in hardened/quenchedand tempered or auto tempered condition for improved toughness, strength and wear resistance. The C content and tempering temperature are optimized based on desired application. However, achieving high strength/hardness along with adequate toughness is a challenge. The chemistry designis one of the important parts of developing these grades. The judicious …
Characterization Of Tio2-Activated Carbon Onto Adsorption And Photocatalytic Propertiesand Its Application, Mark Chobchun, Pasakorn Jutakridsada, Puttiporn Thiamsinsangwon, Pornnapa Kasemsiri, Khanita Kamwilaisak, Prinya Chindaprasirt
Characterization Of Tio2-Activated Carbon Onto Adsorption And Photocatalytic Propertiesand Its Application, Mark Chobchun, Pasakorn Jutakridsada, Puttiporn Thiamsinsangwon, Pornnapa Kasemsiri, Khanita Kamwilaisak, Prinya Chindaprasirt
Journal of Metals, Materials and Minerals
This study investigates the characterization of TiO2in conjunction with activated carbon(AC) on its adsorption and photocatalytic properties. TiO2in theabsence and presence of AC were preparedby the sol-gel method. TiCl4was used as a precursor to reduce using acidic solution during preparationprocess. The effects of the amount of AC on the characteristics of composites were investigated. TGA technique was used to evaluate the amount of TiO2and AC in TiO2/AC composite. The adsorptionproperties of TiO2/AC were characterized using XRD, TEM, N2adsorption/desorption, FTIR and UV - Visdiffuse reflectance spectroscopy techniques. The photocatalytic activitiesof the composites were investigated by measuring the removal of acid dye. …
Screen Printed Textile Electrodes Using Graphene And Carbon Nanotubes With Silver For Flexible Supercapacitor Applications, Norawich Keawploy, Radhakrishnan Venkatkarthick, Panyawat Wangyao, Jiaqian Qin
Screen Printed Textile Electrodes Using Graphene And Carbon Nanotubes With Silver For Flexible Supercapacitor Applications, Norawich Keawploy, Radhakrishnan Venkatkarthick, Panyawat Wangyao, Jiaqian Qin
Journal of Metals, Materials and Minerals
The eco-friendly conductive cotton textile is promising alternatives for the flexible substrates in wearable devices since the cotton is as an inexpensive natural fabric material and compatible in modern portable electronics with adequate electrical conductivity. In this work, flexible conductive cotton-based electrodes areprepared via a screen-printing method using the carbonaceous nanomaterialssuch as carbon nanotubes (CNTs) and graphene with an additional component of conductive silver (Ag) powder and textile ink. The prepared conductive cotton electrodes exhibit lower sheet resistance (<10Ω) along with superior mass loading (20-30mgcm-2). On the basis of the performance of cottonelectrodes prepared, an all-solid-state flexible supercapacitor device was successfully fabricated whichexhibits a high specific areal capacitance of 677.12 mFcm-2at 0.0125 mAcm-2 for a suitable electrodecomposition (60% of Ag and 40% CNTs) using a PVA-KOH gel electrolyte. The flexible device endures a stable electrochemical performance under severe mechanical deformation using differentbending angles (0, 30, 45, 60and 90) of the device and possesses excellent cyclic stability with the capacitance retention of ~80% even after 3000 CV cycles.
The Usage Of Coal−Layered Double Oxide For Removal Of Toxic Dye Fromaqueous Solution, Pornnapa Tongchoo, Sonchai Intachai, Prakaidao Pankam, Chomponoot Suppaso, Nithima Khaorapapong
The Usage Of Coal−Layered Double Oxide For Removal Of Toxic Dye Fromaqueous Solution, Pornnapa Tongchoo, Sonchai Intachai, Prakaidao Pankam, Chomponoot Suppaso, Nithima Khaorapapong
Journal of Metals, Materials and Minerals
CoAl−layered double oxide derived from calcination of CoAl−layered double hydroxide at400Cfor 120 min, delivered the change in microstructure with increasing surface area. Spinel Co3O4was the majority in the product as confirmed by X-ray diffraction, and Fourier transform infrared andUV-visible spectroscopies. The calcined product, CoAl−layered double oxide resulted in significantadsorption capacity on dye removal superior to that of CoAl−layered double hydroxide. The adsorbed amounts of the diverse dyes increased as follows: methylene blue phenolphthaleinmethyl orange orange II. The adsorption affinity between adsorbent and dyes relied on electrostatic interaction and physical adsorption.
Soldering Of Copper Using Graphene-Phosphoric Acid Gel, Gurudatt Puranik, Asis Sarkar, Nirankar Mishra, Sangam Chandrasekhar Gurumurthy, Shridhar Mundinamani
Soldering Of Copper Using Graphene-Phosphoric Acid Gel, Gurudatt Puranik, Asis Sarkar, Nirankar Mishra, Sangam Chandrasekhar Gurumurthy, Shridhar Mundinamani
Journal of Metals, Materials and Minerals
Soldering is a physical process in which one metal melts and joins the other to form a strong bond,which further helps in electron conduction and increases the mechanical strength in any electronic circuits. The present work demonstrates the development of graphene-based flux comprising of 2 g of graphene and 2 ml of phosphoric acid for the residue-free, high stability, durable, and two-stepsoldering of copper wire on to the surface of the copper-based printed circuit board. The soldering fluxcan be applied to the copper, and wire can be soldered in ambient conditions using commercial solderingiron at a standard soldering temperature of …
Laser Powder Bed Fusion Of Ti6al4v Lattice Structures And Their Applications, Thywill Cephas Dzogbewu
Laser Powder Bed Fusion Of Ti6al4v Lattice Structures And Their Applications, Thywill Cephas Dzogbewu
Journal of Metals, Materials and Minerals
The study focused on producing lattice structures using rhombic and diagonal nodes and indicatingtheir logical biomedical and engineering applications. Laser powder bed fusion manufacturingtechnology a subset of additive manufacturing was used to manufacture the lattice structures with different struts geometry. Average elastic modulus value of 5.30.2 GPa was obtained for therhombic lattice structures and 5.10.1 GPa for the diagonal lattice structures. Generally, the mechanicalproperties of the lattice structures produced could be logically considered suitable for biomedical and engineering applications. The mechanical properties of the lattice structures could be fine-tunedfor a specific engineering or biomedical applications by varying the lattice properties …
Preparation And Properties Of Fired Clay Bricks With Added Wood Ash, Anuwat Srisuwan, Supachai Sompech, Chiawchan Saengthong, Sukhontip Thaomola, Prinya Chindraprasirt, Nonthaphong Phonphuak
Preparation And Properties Of Fired Clay Bricks With Added Wood Ash, Anuwat Srisuwan, Supachai Sompech, Chiawchan Saengthong, Sukhontip Thaomola, Prinya Chindraprasirt, Nonthaphong Phonphuak
Journal of Metals, Materials and Minerals
This study was designed to determine the effects of wood ash on the physical and mechanical properties of fired clay bricks. The clay bricks were fabricated with the addition of 0, 4, 8, 12, and 16% by weight of wood ash. Strength development of brick was cased byfired at 900, 1000, and 1100°C for 40 min. The experimental results demonstrated that the physical property and strength of the fired clay bricks depend on the wood ash contentand firing temperature. Higher wood ash content affected an increase in porosity and water absorption, while the bulk density of the clay brickswas reduced. …
Ultraviolet‐Shielding And Water Resistance Properties Of Graphene Quantum Dots/Polyvinyl Alcohol Composite-Based Film, Sutthipoj Wongrerkdee, Pichitchai Pimpang
Ultraviolet‐Shielding And Water Resistance Properties Of Graphene Quantum Dots/Polyvinyl Alcohol Composite-Based Film, Sutthipoj Wongrerkdee, Pichitchai Pimpang
Journal of Metals, Materials and Minerals
The Ultraviolet‐shielding (UV‐shielding) and water resistance properties of graphene quantum dots/polyvinyl alcohol (GQDs/PVA) composite-based film have been investigated. The GQDs/PVA composite-based films were fabricated with different GQDs concentrations of 0, 5, 10, 15, and 20 wt%. The optical property of GQDs was carried out by utilizing fluorescence spectroscopy. Characterizationsof GQDs/PVA composite-based films were performed byusing FT-IR spectroscopy, and UV-vis spectroscopy. It was found that GQDs exhibited the strongest excitation wavelength in the UV range. GQDs/PVA composite-based films offered an improved UV-shielding capacity when compared to PVA films and glass. Particularly, the GQDs/PVA composite-based film containing 20 wt% GQDs exhibited a …
Impact Of Boron Carbide And Graphite Dual Particulates Addition On Wear Behavior Of A356 Alloy Metal Matrix Composites, Pankaj R. Jadhav, Madeva Nagaral, Shivakumar Rachoti, Jayasheel I. Harti
Impact Of Boron Carbide And Graphite Dual Particulates Addition On Wear Behavior Of A356 Alloy Metal Matrix Composites, Pankaj R. Jadhav, Madeva Nagaral, Shivakumar Rachoti, Jayasheel I. Harti
Journal of Metals, Materials and Minerals
The current work gives the detailed microstructural analysis and wear behaviour of aluminiumalloy A356 based metal matrix composite. Here, boron carbide (B4C) and graphite (Gr) particulates were used as reinforcing phase to develop A356/ 4 wt% B4C, A356/ 4 wt% Gr composites along with A356/ 4 wt% Gr/ 12 wt% B4C hybrid composites. The composites were developed by conventional stir casting method to improve the wear properties. The developed composites were subjected to scanning electron microscope (SEM) formicrostructural analysis and then to DUCOM made wear test assembly to know the dry sliding wear behaviour. The wear tests were conducted for …
Influence Of Coconut Shell Powder Organic Reinforcement On Chemical, Microstructuraland Mechanical Properties Of Spark Plasma Sintered Ti-Ni Based Metal Matrix Composite, Peter Odetola, Abimbola Patricia Popoola, Emmanuel Ajenifuja, Olawale Popoola
Influence Of Coconut Shell Powder Organic Reinforcement On Chemical, Microstructuraland Mechanical Properties Of Spark Plasma Sintered Ti-Ni Based Metal Matrix Composite, Peter Odetola, Abimbola Patricia Popoola, Emmanuel Ajenifuja, Olawale Popoola
Journal of Metals, Materials and Minerals
Metal matrix composites (MMCs) are currently used in place of pure alloys and polymer matrix composites because of their unique physical properties. Titanium and nickel powders were alloyed with coconut shell powder (CSP) as organic compound reinforcement to form a TiNi-based metal matrix composite (MMC) using spark plasma sintering (SPS) technique. The powders were mild-milledfor 16 h and then axially consolidated at 850C, heating rate of 100Cmin-1and 50 MPa sintering pressure. Characterizations were done using field emission scanning electron microscope (FE-SEM-EDX) and x-ray diffractometer (XRD). Elemental and structural characterizations of the composites revealed the formation of the Ti-rich eutectic phase, …
Mechanical Characterization And Wear Behavior Of Aerospace Alloy Aa2124 And Micro B4c Reinforced Metal Composites, Fazil N, V Venkataraman, Madeva Nagaral
Mechanical Characterization And Wear Behavior Of Aerospace Alloy Aa2124 And Micro B4c Reinforced Metal Composites, Fazil N, V Venkataraman, Madeva Nagaral
Journal of Metals, Materials and Minerals
In the present investigation, the mechanical and wear properties of aerospace alloy AA2124-9wt%of B4C composites were displayed. The composites containing 9wt% of micro boron carbidein AA2124 alloy were synthesized by liquid metallurgy method through stir casting. For the composites, reinforcement particles were preheated to a temperature of 400°Cand afterward added in ventures of two stages into the vortex of liquid AA2124 alloy compound to improve the wettability anddispersion. Microstructural examination was carried out by SEM and elemental investigation was finished by EDS. Mechanical and wear properties of as cast AA2124 alloy and AA214-9wt% of B4C composites were evaluated as per …
Effect Of Amorphous Rice Husk Silica Additionon The Structure Of Asphalt Composite, Simon Sembiring, Agus Riyanto, Rudy Situmeang, Zipora Sembiring, Nita Susanti, Iqbal Firdaus
Effect Of Amorphous Rice Husk Silica Additionon The Structure Of Asphalt Composite, Simon Sembiring, Agus Riyanto, Rudy Situmeang, Zipora Sembiring, Nita Susanti, Iqbal Firdaus
Journal of Metals, Materials and Minerals
In this study, modified asphalt composites were produced by adding silica extracted from rice husk.The mass ratios of asphalt to silica are 1:0, 1:1.6, 1:1.8, and 1:2 and calcined at the temperature of 150C for 6 h.The structural and microstructural characteristics of asphalt composites were examinedby x-ray diffraction (XRD),Scanning Electron Microscopy/Energy Dispersive x-ray (SEM-EDX) Spectroscopy and Differential Thermal Analysis (DTA-TGA),respectively. The XRDstudy revealed that the major phases were carbon and amorphous silica. The surface morphology of asphalt without silica addition presents a cluster of larger size than the cluster of asphalt with an addition of silica. The addition of silica …
Dyeing Properties And Color Fastness Of Eri Silk Yarn Dyed With Soaked Red Kidneybean Water, Piyaporn Kampeerapappun, Kritsana Wongwandee, Siriluk Janon
Dyeing Properties And Color Fastness Of Eri Silk Yarn Dyed With Soaked Red Kidneybean Water, Piyaporn Kampeerapappun, Kritsana Wongwandee, Siriluk Janon
Journal of Metals, Materials and Minerals
The purpose of this research was to study the dyeing of eri silk yarn using soaked red bean water. The optimal condition for preparing dye solutions was a ratio of 1:5 of dried red bean to water and dyeing at 100°C for 45 min. The dyeing process was conducted with and without mordants, using three different mordanting methods; pre-mordanting, meta-mordanting, and post-mordanting. The effects on silk analyzed are color fastness to washing, wet and dry rubbing, acid and alkali perspiration, and color characteristics on CIEL*a*b* color coordinates.Without mordants, the dyed silk yarn gave a rosy brown color. Each mordant caused …
Effect Of Variations In The Composition And Size Of Red Sand Grains On The Quality Of K-225 Concrete, Mukti Hamjah Harahap, Aulia E. Putri
Effect Of Variations In The Composition And Size Of Red Sand Grains On The Quality Of K-225 Concrete, Mukti Hamjah Harahap, Aulia E. Putri
Journal of Metals, Materials and Minerals
The effect of variations in the composition and size of red sand grains on the solid quality made in the form of a 15×15×15 cm cubes were investigated. By implementing the standard of SNI K-225 which is a mixture of 1:1.9:2.8 with FAS 0.6 and the composition of red sand consisting of 0, 2, 4, 5,and 6.5% of the weight of fine aggregate and variations in the size of red sand grains of 80, 100, and 120 mesh, the concrete was being treated in a water bath for 28 days. It was tested by the method of water absorption, compressive …
Effects Of Solid Lubricants On Properties Of Al-Si-Sic Composite Powderproduced By Gas Atomization Technique, Haris Rudianto, Sang Sun Yang, Yong Jin Kim, Ivo Dlouhy, Wahyu Caesarendra
Effects Of Solid Lubricants On Properties Of Al-Si-Sic Composite Powderproduced By Gas Atomization Technique, Haris Rudianto, Sang Sun Yang, Yong Jin Kim, Ivo Dlouhy, Wahyu Caesarendra
Journal of Metals, Materials and Minerals
Al-Si-SiC composites powder was analyzed in this research. The powder was made by gas atomizing process. Powder characterization was done to observe its morphology, particle size distribution and thermal properties. Effects of lubricants were intensively investigated in this research with compositions and pressure variables. It is assumed that higher amount of solid lubricant put into the powder, the lower ejection force needed to take out compacted powder. Finding appropriate solid lubricant is necessary to improve green and sintering properties. EBS (ethylene bis stearamide), aluminum stearate, zinc stearate and paraffin wax were used for investigation. Sintering under ultra high purity nitrogen …
Observation Of Structural, Spectral Characterizations And Correlation Of Physical Parameters On Vo2+ Ions Doped Cadmium Lithium Sodium Borate Glasses, Mekala Avinash, Shaik Johny Basha, Vinukonda Khidhirbrahmendra, Annur Vivekananda Chandrasekhar, Renduchintala Venkata Satya Sri, Nagoji Ravikumar
Observation Of Structural, Spectral Characterizations And Correlation Of Physical Parameters On Vo2+ Ions Doped Cadmium Lithium Sodium Borate Glasses, Mekala Avinash, Shaik Johny Basha, Vinukonda Khidhirbrahmendra, Annur Vivekananda Chandrasekhar, Renduchintala Venkata Satya Sri, Nagoji Ravikumar
Journal of Metals, Materials and Minerals
A series of quinary 0.1 mol% VO2+ doped Cadmium Lithium Sodium Borate(CLNB) glass system with varying alkali (Li2O/Na2O) content were prepared by the classical melt quenching technique. The current research was carried out to observe the physical, structural and spectral parameters alter with the variation of alkali content in nonlinear manner. Physical properties such as the oxide ion polarizability (∝ைయష), optical basicity of prepared glass (Λth), Yamashita and Kuroswa's interaction parameter (Α) and the third order nonlinear optical polarizability ((3)) are calculated by compared with altering the alkali mol% and also correlate them with each other. Physical parameters are varying …
Review On The Suppression Of Zn Dendrite For High Performance Of Zn Ion Battery, Jufni Abdulla, Jin Cao, Panyawat Wangyao, Jiaqian Qin
Review On The Suppression Of Zn Dendrite For High Performance Of Zn Ion Battery, Jufni Abdulla, Jin Cao, Panyawat Wangyao, Jiaqian Qin
Journal of Metals, Materials and Minerals
Researchers are paying more attention to the environmentally friendly and low-cost energy storage devices, due to the environmental issues and energy crisis caused by current commercial energy storage technologies. Zinc ion battery (ZIB) is one of the new, environment-friendly and low-cost energy storage technologies, which is the most promising alternative technology to replace the lithium ion battery applications. However, one of the challenges-dendrite growths during cycling of Zn anode is still limited its practical applications. In this review, the recent progress on suppression of Zn dendrite in various electrode design, electrolyte additives, and separator modifications for ZIBs is summarized.