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Articles 421 - 450 of 788
Full-Text Articles in Materials Science and Engineering
Influence Of Cnts Addition On Structural And Superconducting Properties Of Mechanically Alloyed Mgb2, Sigitdwi Yudanto, Yulia Puspa Dewi, Perdamean Sebayang, Septian Adichandra, Agung Imaduddin, Budhy Kurniawan, Azwar Manaf
Influence Of Cnts Addition On Structural And Superconducting Properties Of Mechanically Alloyed Mgb2, Sigitdwi Yudanto, Yulia Puspa Dewi, Perdamean Sebayang, Septian Adichandra, Agung Imaduddin, Budhy Kurniawan, Azwar Manaf
Journal of Metals, Materials and Minerals
The result of adding carbon nanotubes (CNTs) to the lattice parameters, critical temperature and electrical resistivity of the MgB2 superconductors is reported.Structurally, the addition of CNTs was found to decrease the a-lattice from 3.086 Å of CNTs free sample to 3.078 Å and 3.074 Å of 5% and 10% CNTs added samples due to a substitution of C at the B site which presence in the form of Mg(B1-xCx)2 main phase. The doping level x of CNTs added samples were 2.25 at% and 3.75 at% respectively. The unreacted CNTs presence as the second phase and further acting as the suppression …
Effects Of Quenchants On Microstructures And Mechanical Properties Ofsteel Gradeaisi 5160, Pattama Apichai
Effects Of Quenchants On Microstructures And Mechanical Properties Ofsteel Gradeaisi 5160, Pattama Apichai
Journal of Metals, Materials and Minerals
This research aims to study the effects of the quenchants in hardening process on microstructures and mechanical properties of alloy steel grade AISI 5160. The heat treatments include hardening at 900 (Q1), 870 (Q2), 840 (Q3), 810 (Q4) and 780°C (Q5),respectively, followed by quenching into water, oil and brine solution. Microstructures were measured scanning electron microscopy and energy dispersive X-ray spectroscopy.For each condition, hardness and tensile testing were measured. It was found that the microstructure in the as-sheetcondition consisted of ferrite and pearlite. The observed microstructures after quenching process were martensitewith a small amount of retained austainite. The hardening at …
Optical Properties Of Tio2@Ag Nanowires And Nanospheres, Thananchai Dasri, Panuwat Chaiyachate, Sasiporn Audtarat, Panadda Charee, Artit Chingsungnoen
Optical Properties Of Tio2@Ag Nanowires And Nanospheres, Thananchai Dasri, Panuwat Chaiyachate, Sasiporn Audtarat, Panadda Charee, Artit Chingsungnoen
Journal of Metals, Materials and Minerals
Nanoparticles (NPs) with nonmetallic cores and metallic shells (such as Au, Ag, and Cu) can exhibit improve absorption efficiency due to localized surface plasmon resonance (LSPR), charge density oscillations at the surfaces of these core-shell composite nanoparticles. In this study, the effect of the geometry of TiO2@Ag core-shell composite nanoparticles on their optical absorption properties was theoretically illustrated in the wavelength ranges between the visible and infrared light regions of electromagnetic radiation. These nanostructures were modeled by varying the TiO2 core and Ag shell radii of the composite nanospheres and nanowires. The results indicate that varying the TiO2 core radius …
Incorporation Of Fe And Cu For Antibacterial Performance Enhancement Of Fe-Cu-Zno Nanocomposites Synthesized By A Facile Chemical Precipitation, Sucheewan Krobthong, Sutthipoj Wongrerkdee
Incorporation Of Fe And Cu For Antibacterial Performance Enhancement Of Fe-Cu-Zno Nanocomposites Synthesized By A Facile Chemical Precipitation, Sucheewan Krobthong, Sutthipoj Wongrerkdee
Journal of Metals, Materials and Minerals
Fe-Cu-ZnO nanocomposites were synthesized using simple chemical precipitation under a violent stirring condition, and characterized by dynamic light scattering, ultraviolet-visible spectroscopy, scanning electron microscopy, X-ray diffractometry, Raman spectroscopy, and vibrating sample magnetometer. The particle size distribution is observed not only a large size of 100 nm to 2 m, but also a small size of 0.4-5.0 nm. The absorbance peaks of the nanocomposites exhibit a small blue shift in comparison with ZnO. Surface defects are explored in the nanocomposites including irregular shapes, rough surfaces, and aggregation. The nanocomposites and ZnO have similar hexagonal wurtzite structures. However, the nanocomposites have more …
Corrosion And Cavitation Erosion Properties Of Sub-Micron Wc-Co /Cr3c2-Nicr Multi-Layered Coating On Aluminium Substrates, Srinivas Vadapalli, Umachaitanya Pathem, Venkata Ramana S N Vuppala, Kodandarama Rao Chebattina, Jaikumar Sagari
Corrosion And Cavitation Erosion Properties Of Sub-Micron Wc-Co /Cr3c2-Nicr Multi-Layered Coating On Aluminium Substrates, Srinivas Vadapalli, Umachaitanya Pathem, Venkata Ramana S N Vuppala, Kodandarama Rao Chebattina, Jaikumar Sagari
Journal of Metals, Materials and Minerals
Marine and automobile components are subjected to corrosion and cavitation erosion during their service. This paper aims to study the use of hard coatings on aluminium substrates with multiple layers of coating comprising of sub-micron sized WC-Co andCr3C2-NiCr for enhancement of hardness, corrosion and cavitation erosion properties. Coatings are applied on aluminium substrates using high-velocity liquid fuel (HVLF) spray technique and the coating parameters are optimized for best results. The results indicate that multiple layered coating with alternate film coatings of Cr3C2-NiCr & submicron WC-Co has significantly improved the hardness of aluminium surface. The resistance to corrosion with multiple layers …
Impact Of Fillers For Acrylic Compositions On Their Stability In Aggressive Mediums And Adhesive Strength, Liudmyla Trykoz, Svetlana Kamchatnaya, Oksana Pustovoitova, Inna Saiapina, Dmytro Borodin
Impact Of Fillers For Acrylic Compositions On Their Stability In Aggressive Mediums And Adhesive Strength, Liudmyla Trykoz, Svetlana Kamchatnaya, Oksana Pustovoitova, Inna Saiapina, Dmytro Borodin
Journal of Metals, Materials and Minerals
This paper aims to reveal the change of diffusion coefficient and permeability of the acrylic composition with different types of fillers (such as cement, sand, mica, and talc) in the various aggressive mediums. Also, the adhesive strength was determined as the maximal stress caused by detaching metal plate from the surface of the concrete. To evaluate the stability of the compositions, the samples of the acrylic compositions were saturated with acid and alkali solutions during a certain time. Basing on the mass change, the coefficients of diffusion, sorption, and permeability were calculated. The sand filled acrylic composition showed the least …
Experimental And Numerical Investigation Of The Influence Of Temperature On The Fracture Behavior Of High Impact Polystyrene Evaluated By The J-Integral Approach Using Multiple Specimen Method, Hanan El Bhilat, Abdelilah Hachim, Houda Salmi, Khalid El Had
Experimental And Numerical Investigation Of The Influence Of Temperature On The Fracture Behavior Of High Impact Polystyrene Evaluated By The J-Integral Approach Using Multiple Specimen Method, Hanan El Bhilat, Abdelilah Hachim, Houda Salmi, Khalid El Had
Journal of Metals, Materials and Minerals
The aim of the present work is to study the mechanical behavior in fracture of high impact polystyrene (HIPS) subjected to tensile tests under the effect of temperature to determine the R-curves. The theory of the J-integral contour has been used for the development of a characterization method of the fracture strength appropriate to the case of this non-linear elastoplastic polymer material. To this end, we used the method of multiple specimens (Single edge notch tension SENT) of thin thickness; we used several identical test pieces containing cracks of the same lengths. The tensile tests wereconducted under different temperatures, ranging …
Optimization Of Wet Sliding Wear Parameters Of Titanium Grade 2 And Grade 5 Bioimplant Materials For Orthopedic Application Using Taguchi Method, Sachin Ganeshrao Solanke, Vivek R. Gaval
Optimization Of Wet Sliding Wear Parameters Of Titanium Grade 2 And Grade 5 Bioimplant Materials For Orthopedic Application Using Taguchi Method, Sachin Ganeshrao Solanke, Vivek R. Gaval
Journal of Metals, Materials and Minerals
In this research ball on disc wear tests have been carried out on Titanium grade 2 and Titanium grade 5 material using ASTM G-99 standard at room temperature in simulated body fluid. The tribological property such as the weight loss was studied by using the Taguchi design of experiments. The design of experiment was done using an L18 orthogonal array. An analysis of variance demonstrated that the individual contribution such as the applied normal load factor was 91.17% for weight loss, which means it is highest individual contribution as compared to other factors so it was concluded that weight loss …
Chitosan Beads As The Adsorbent For Glyphosate Removal From An Aqueous Solution, Thanat Saelim, Sermpong Sairiam, Krisana Siralertmukul, Supawin Watcharamul, Roongkan Nuisin
Chitosan Beads As The Adsorbent For Glyphosate Removal From An Aqueous Solution, Thanat Saelim, Sermpong Sairiam, Krisana Siralertmukul, Supawin Watcharamul, Roongkan Nuisin
Journal of Metals, Materials and Minerals
Chitosan beads were prepared to remove glyphosate from an aqueous solution via a batch adsorption system. The optimum conditions, including initial glyphosateconcentration, adsorbent dose, and contact time, were investigated. Increasing the initial glyphosate concentration increased the equilibrium adsorption capacity onto the chitosan beads. The rapid sorption of glyphosate was found at an initial contact time of 30 min. The maximum adsorption capacity from 35 mg·L-1 glyphosate in solution onto 0.1 g chitosan beads was 12.7 mg·g-1. Increasing amount chitosan to 0.5 g dosage could remove more than 94% of the glyphosate for all initial glyphosate concentrations (1 - 35 mg·L-1), …
Microstructure Evolution And Mechanical Properties Of Calcined Kaolin Processing Waste-Based Geopolymers In The Presence Of Different Alkaliactivator Content By Pressing And Casting, Sitthisak Prasanphan, Anucha Wannagon, Takaomi Kobayashi, Sirithan Jiemsirilers
Microstructure Evolution And Mechanical Properties Of Calcined Kaolin Processing Waste-Based Geopolymers In The Presence Of Different Alkaliactivator Content By Pressing And Casting, Sitthisak Prasanphan, Anucha Wannagon, Takaomi Kobayashi, Sirithan Jiemsirilers
Journal of Metals, Materials and Minerals
In this work, microstructure evolution and mechanical properties of calcined kaolin processing waste-based geopolymers in the presence of low and high contents alkali activators were studied. Lower and higher contents of alkali activators were employed to synthesize geopolymers by pressing and casting methods, respectively. Chemicalbonding analysis, microstructure/elemental analysis, phase composition analysis, and compressive strength test were performed using FTIR, SEM/EDX, XRD, anduniversal mechanical testing machine, respectively. Findings showed that geopolymer with the low content of alkali activator formed by pressing (pressed geopolymer) might promote in the higher degree of geopolymerization because of higher compacted matrices but geopolymer with the high …
Retention Of Amorphous Silica In Rice Hulls At High Temperatures, Takeshi Okutani
Retention Of Amorphous Silica In Rice Hulls At High Temperatures, Takeshi Okutani
Journal of Metals, Materials and Minerals
Rice hulls contain around 20 wt% amorphous silica (rice hull silica). Rice hullsilica containing no potassium impurity crystallized from amorphous silica to cristobaliteat 1300C. When a small amount of MgO or -Fe2O3 or Al2O3 were added to the rice hull silica, the rice hull silica crystallized to cristobalite at 1500C. MgO, -Fe2O3 and Al2O3 diffused to silica as Mg2+, Fe3+ and Al3+ at high temperatures. These ions broke the SiO4 tetrahedron network, so that the amorphous state of rice hull silica was maintained. As sintering occurred at 1500C in rice hull silica mixed with additives such as MgO, the melting …
Solid Particle Erosive Wear Behaviour Of Flame Sprayed Eva Based Polymeric Coatings, Ekrem Altuncu, Barış Önen
Solid Particle Erosive Wear Behaviour Of Flame Sprayed Eva Based Polymeric Coatings, Ekrem Altuncu, Barış Önen
Journal of Metals, Materials and Minerals
Flame spraying of polymers allows obtaining functional coatings for protecting against wear and corrosion. Among many engineering polymers, the Ethylene-Vinyl Acetate (EVA) copolymer attracts attention with its superior mechanical and chemical properties. EVA, which has high chemical resistance, high impact resistance and mechanical flexibility, high friction coefficient, is among the candidate coating material that can be used in aerospace, automotive, marine, chemical and manufacturing industries to protect metallic surfaces. The use of polymeric coatings in applications is often restricted when large surfaces need to be coated or if the coating needs to be applied in the openair field. Flame spraying …
Tribological Properties Of Polymeric Composites: A Review, Yusuf Şahin, Hakan Şahin
Tribological Properties Of Polymeric Composites: A Review, Yusuf Şahin, Hakan Şahin
Journal of Metals, Materials and Minerals
Tribology deals with interacting surfaces in sliding, rolling or any others types of motions, which is much importance in designing for machine components to improve their durability's of mechanical engineering systems. This study overviews the most recent studies on the tribological behavior of polymeric based materials containing different fillers. Some microstructural and mechanical properties of the epoxy composite are introduced. In addition, mechanisms of increasing wear resistance and reducing friction coefficient for polymeric composites are reviewed. An overview is also covered the process optimization for the dry wear results of polymeric composites using Taguchi Method (TM) and Response Surface Method …
Ceramic And Glass-Ceramic Fillers In Dental Composites: A Review, Sumana Ghosh
Ceramic And Glass-Ceramic Fillers In Dental Composites: A Review, Sumana Ghosh
Journal of Metals, Materials and Minerals
Dental composite fillings are most popular fillings wherein various fillers have been suitably dispersed in a polymerizable resin. Major challenges are to make choice of suitable filler and their distribution in the resin matrix in the development of the dental fillings. Apart from traditional fillers ceramic whiskers, glass fibres, branched fibres and nanoporous powders have also been investigated as fillers in dental composites. Recently, ceramic, and glass-ceramic fillers are attracting attention of the researchers due to their suitable combination of material properties. In the current paper, the prospect of ceramic and glass-ceramics as fillers in fabricating dental composites has been …
Insearchfornear-Room-Temperaturesuperconductingcriticaltemperatureofmetalsuperhydridesunderhighpressure: A Review, Udomsilp Pinsook
Insearchfornear-Room-Temperaturesuperconductingcriticaltemperatureofmetalsuperhydridesunderhighpressure: A Review, Udomsilp Pinsook
Journal of Metals, Materials and Minerals
An overview and the latest status of the superconductivity of metal superhydrides under high pressure are discussed in this review article. The searching for near-room-temperature superconductors have been one of the most enthusiastic fields in physics. This is because of several key factors in both theoretical and experimental sides. By advanced experiment innovation, pressure exceeded that of the earth's core can be generated in laboratories. This allows scientists to explore new physics of materials under high pressure. In the synergy form, the theoretical calculation gives accountable predictions on the structural and electronic properties which can be served as a practical …
Synthesis And Characterization Of Ball-Milled Eggshell And Al2o3 Reinforced Hybrid Green Composite Material, Shrawan Kumar, Shashi Prakash Dwivedi, Vijay Kumar Dwived
Synthesis And Characterization Of Ball-Milled Eggshell And Al2o3 Reinforced Hybrid Green Composite Material, Shrawan Kumar, Shashi Prakash Dwivedi, Vijay Kumar Dwived
Journal of Metals, Materials and Minerals
Eggshell is a by-product (a secondary product derived from a production process) which produces lots of environment pollution. However, some environment pollution can be reduced by utilizing this waste. In the present investigation, an attempt was made to utilize eggshell as the reinforcement material with alumina (Al2O3) in the development of composite material. Carbonized eggshell particles and Al2O3 ceramic particles were ball-milled up to 100 hours to obtain a uniform particle size of reinforcement particles. Results showed that by using Al2O3 with eggshell in the development of aluminium based composite material after the ball-milling, mechanical properties were significantly improved. However, …
Production Of Silica-Based Ceramics Sintered Under Nitrogen Atmosphere From Rice Husk And Sugarcane Bagasse Ash, Wiphawan Khopthong, Benya Cherdhirunkorn
Production Of Silica-Based Ceramics Sintered Under Nitrogen Atmosphere From Rice Husk And Sugarcane Bagasse Ash, Wiphawan Khopthong, Benya Cherdhirunkorn
Journal of Metals, Materials and Minerals
Nitride silica-based ceramics were prepared by sintering under nitrogen atmosphere using rice husk ash and bagasse ash as raw materials. X-ray Fluorescence Spectrometry (XRF) and X-ray Diffractometor (XRD) studies revealed that the main phase of rice husk ash (after calcined at 600C for 6 h.) was amorphous silica, whereas the sugarcane bagasse ash contained quartz and CaCO3. Thus, both ashes would be a good source for silica. Two batches of the 100 wt% rice husk ash (RHA100) and the mixture of 50 wt% rice husk ash and 50 wt% bagasse ash (RHA50BA50) were wet milled using planetary ball milling machine, …
Green-Based Corrosion Protection For Mild Steel In 3.5% Nacl And Distilled Water Medias: Jatropha Curcas And Roselle Extracts, Muhammad A. Afandi, Safaa N. Saud, Esah Hamzah
Green-Based Corrosion Protection For Mild Steel In 3.5% Nacl And Distilled Water Medias: Jatropha Curcas And Roselle Extracts, Muhammad A. Afandi, Safaa N. Saud, Esah Hamzah
Journal of Metals, Materials and Minerals
In this study, the natural sources of Jatropha curcas and Hibiscus Sabdariffa calynx (Roselle) extracts as green corrosion inhibitors were employed to improve the corrosion resistance of mild steel in simulated (3.5% NaCl) and distilled water medias. The inhibiting performance of two types of extracts was studied by visual inspection, microscope analysis, and various electrochemical measurements and the data of corrosion rate were statistically analyzed. The main phenolic compounds of Jatropha and Roselle extracts were confirmed via a liquid chromatography-mass spectrometry. Meanwhile, the functional groups of active phytochemical compounds were characterized via attenuated total reflection spectroscopy (ATR). The results of …
Properties Of Wood-Plastic Composites Based On Pvc/Pla/Pbat Ternary Blend, Laksamon Raksaksri, Phasawat Chaiwutthinan, Amnouy Larpkasemsuk, Saowaroj Chuayjuljit, Anyaporn Boonmahitthisud
Properties Of Wood-Plastic Composites Based On Pvc/Pla/Pbat Ternary Blend, Laksamon Raksaksri, Phasawat Chaiwutthinan, Amnouy Larpkasemsuk, Saowaroj Chuayjuljit, Anyaporn Boonmahitthisud
Journal of Metals, Materials and Minerals
The objective of this work was to improve mechanical properties, thermal resistance, and biodegradability of poly(vinyl chloride) (PVC) by the addition of poly(lactic acid) (PLA), poly(butylene adipate-co-terephthalate) (PBAT), and wood flour (WF). The samples made from a mixture of PVC/PBAT exhibited the highest impact and tensile properties, while properties of the samples made from PVC/PLA had the highest flexural and thermal properties, PVC/PLA/PBAT mixed samples exhibited average mechanical properties. The addition of WF to all the blends increased impact strength, flexural properties, Young's modulus, thermal resistance, and biodegradability of the samples in comparison to those of the neat PVC and …
Synthesis Of Hydroxyapatite From Cuttlebone Under Various Ph Conditions: An Approach For Medical Materials, Sineenart Kangkan, Premjit Arpornmaeklong, Sarute Ummartyotin
Synthesis Of Hydroxyapatite From Cuttlebone Under Various Ph Conditions: An Approach For Medical Materials, Sineenart Kangkan, Premjit Arpornmaeklong, Sarute Ummartyotin
Journal of Metals, Materials and Minerals
To support the bio-based economy, development on hydroxyapatite from cuttlebone was investigated. Cuttlebone is naturally occurring source of calcium. We calcined it at 700°C for 4 h to form a calcium oxide powder. Hydroxyapatite was coprecipitated with calcium oxide powder and phosphoric acid. The effect of the pH ranging from 6 - 10 was controlled by adding ammonium hydroxide. Fourier transform infrared and X-ray diffraction were employed to characterize the structural properties of the hydroxyapatite. Changes in pH did not affect the structural properties of the hydroxyapatite. Thermogravimetric analysis revealed that the hydroxyapatite was thermally stable up to 700°C. At …
Xas Analysis Of Copper Binding In Soils, Wapakorn Siriwong, Penphitcha Amonpattaratkit, Wantana Klysubun
Xas Analysis Of Copper Binding In Soils, Wapakorn Siriwong, Penphitcha Amonpattaratkit, Wantana Klysubun
Journal of Metals, Materials and Minerals
Ecological distribution of copper from soil is depended on its bioavailability and mobility. Copper binding on heterogeneous soil composition is a key information for understanding the long-term fate benefiting suitable management practice for copper in the environment. X-ray absorption spectroscopy (XAS) techniques were used to provide microscopic scale information of copper-binding on different soils. Soil samples containing 14.9-56.6% clay and 0.5-3.4% organic matter were studied. Dry-powder soil samples containing approximated 0.3% copper from batch equilibrated equilibrium experiments were analyzed. Copper K-edge spectrum were collected at the Synchrotron light research institute (SLRI), Thailand in X-ray absorption near edge structure (XANES) and …
Preparation Of Alginate/2-Hydroxyethyl Methacrylate Composite Beads: Role Of Fillers And Characteristics Of Bead Formation, Somkiet Urusetthanon, Somchai Udon, Boonsri Kusuktham
Preparation Of Alginate/2-Hydroxyethyl Methacrylate Composite Beads: Role Of Fillers And Characteristics Of Bead Formation, Somkiet Urusetthanon, Somchai Udon, Boonsri Kusuktham
Journal of Metals, Materials and Minerals
In this research, alginate composite beads were prepared. The objective was to study the effect of particle size of fillers on the viscosity of alginate solution and bead formation. The sodium alginate solution with and without 2-hydroxyethyl methacrylate was dropped into calcium chloride to form the beads. The polymerization of the 2-hydroxyethyl methacrylate in the alginate matrix was occurred by using potassium persulphate as an initiator and N,N/-methylenebisacrylamide as a crosslinking agent and N,N,N/,N/ -tetramethylethylenediamine in the calcium chloride solution as an accelerator. For the preparation of the composite beads, the cotton dust, and sawdust at various ratios were mixed …
Effect Of Polystyrene Molecular Weight And Zinc Oxide Concentration On Dewetting Behavior Of Polymeric Thin Films, Kattaleeya Sujaroon, Phanawan Whangdee, Nampueng Pangpaiboon
Effect Of Polystyrene Molecular Weight And Zinc Oxide Concentration On Dewetting Behavior Of Polymeric Thin Films, Kattaleeya Sujaroon, Phanawan Whangdee, Nampueng Pangpaiboon
Journal of Metals, Materials and Minerals
The separation between ultra-thin polymer film on metal oxide substrate is called dewetting. Dewetting causes the polymer films to loss their stability and other important properties, for example, the films may short circuit or reduce their transparency. Therefore, the stability of polymer thin films on substrate need to be improved. Addition of nanoparticles is one of the most popular technique used to increase the stability of polymer thin films. The correlation between the different of molecular weight and ZnO concentration on dewetting behavior was studied in this research. The appropriate concentration of ZnO on dewetting suppression in each molecular weight …
Effects Of Sodium Silicate As Liquid Phase Sintering Additives On Properties Of Alumina Ceramics, Kanyapak Siriphaisarntavee, Charusporn Mongkolkachit, Mateekul Jiarawattananon, Karn Serivalsatit, Thanakorn Wasanapiarnpong
Effects Of Sodium Silicate As Liquid Phase Sintering Additives On Properties Of Alumina Ceramics, Kanyapak Siriphaisarntavee, Charusporn Mongkolkachit, Mateekul Jiarawattananon, Karn Serivalsatit, Thanakorn Wasanapiarnpong
Journal of Metals, Materials and Minerals
This research focused on the production of high-performance alumina products. The feasibility of using soluble alkali silicate in liquid phase sintering of alumina was studied. Liquid soluble alkali silicate was used to enhance the plastic forming of alumina and formed liquid phase sintering to attain fired alumina products with high strength, high alumina content and low water absorption. The methodology consisted of the mixing of organic binder with sodium silicate (Na2SiO3), used as liquid phase sintering additive, of 0-15 wt%. Magnesium carbonate (MgCO3), used as the grain growth inhibitor, of 0-1 wt% were added and followed by alumina powders. The …
Synthesis And Fabrication Of Polyaniline/Eggshell Composite In Ammonia Detection, Nurul Aqilla Mazlan, Jamil M. Sapari, Kavirajaa Pandian Sambasevam
Synthesis And Fabrication Of Polyaniline/Eggshell Composite In Ammonia Detection, Nurul Aqilla Mazlan, Jamil M. Sapari, Kavirajaa Pandian Sambasevam
Journal of Metals, Materials and Minerals
This study focuses on the measurement and performance of bio-filler composite based on polyaniline (PANI)/chicken eggshell (CES). The composite films were prepared via ex-situ polymerisation using DBSA as its dopant. The PANI solution was distributed equally before mixing it with three different ratios of CES powder. Characterisations of the composite films were analysed using Fourier-transform infrared spectroscopy (FTIR) and Ultraviolet-visible spectroscopy (UV-Vis), Scanning electron microscope/energy dispersive x-ray (SEM/EDX) and multimeter. PANI film that contained 20mg CES filler possessed the highest conductivity and the fastest time to achieve 90% of sensitivity. The film was also very selective towards ammonia gas and …
Tribology, Mechanical Properties And Coloration Of A Mica Glass-Ceramic, Sahadsaya Prasertwong, Sukanda Angkulpipat, Thapanee Srichumpong, Kallaya Suputtamongkol, Chanchana Thanachayanont, Ramona Sola4, Greg Heness, Cristina Leonelli, Duangrudee Chaysuwan
Tribology, Mechanical Properties And Coloration Of A Mica Glass-Ceramic, Sahadsaya Prasertwong, Sukanda Angkulpipat, Thapanee Srichumpong, Kallaya Suputtamongkol, Chanchana Thanachayanont, Ramona Sola4, Greg Heness, Cristina Leonelli, Duangrudee Chaysuwan
Journal of Metals, Materials and Minerals
The research employed pigments, Fe2O3 and CeO2, into the glass frit for adjustable mechanical properties and coloration. Disc samples were prepared to determine microstructures and mechanical properties in terms of tribology and nano-indentation hardness as well as biaxial flexural strength. The glass system presented the crystalline phases, by XRD, of phlogopite Ca-mica, fluorapatite, stishovite, anorthite and strontium apatite. Furthermore, SEM micrographs revealed rod-like microstructures and parent glass phase in all specimens 1) GC, 2) GC + 1wt% CeO2, 3) GC + 0.1wt% Fe2O3 and 4) GC + 1wt% CeO2 + 0.1wt% Fe2O3. For the tribology test, specimens were tested by …
Dry-Sliding Wear Of The 316l/H-Bn Composites Produced Under Crack Ammonia Atmosphere, Ekkarat Chusong, Panya Kansuwan, Naoto Ohtake, Pongsak Wila, Nattaya Tosangthum, Ruangdaj Tongsri
Dry-Sliding Wear Of The 316l/H-Bn Composites Produced Under Crack Ammonia Atmosphere, Ekkarat Chusong, Panya Kansuwan, Naoto Ohtake, Pongsak Wila, Nattaya Tosangthum, Ruangdaj Tongsri
Journal of Metals, Materials and Minerals
Wear is one of different problems in mechanical failures of moving components. When a component encounters friction force on its surface, crack initiation tends to occur and wear follows crack propagation. Thus, the moving parts of automobiles should have proper wear resistance for long-time services, in addition to having high strength and hardness for heavy load operation. A self-lubricating material with compromised tribological and mechanical properties is important for some moving components. In this work, self-lubricating composites, metal matrix composites embedded with a solid lubricant, made from 316L stainless steel powder mixed with different hexagonal boron nitride (h-BN) contents of …
Selection Of Blowing Agent For Metal Foam Production: A Review, Ankur Bisht, Brijesh Gangil, Vinay Kumar Patel
Selection Of Blowing Agent For Metal Foam Production: A Review, Ankur Bisht, Brijesh Gangil, Vinay Kumar Patel
Journal of Metals, Materials and Minerals
Metal foams are cellular solids in which gas is uniformly distributed throughout the metal matrix. One of the cheapest ways of evolving the gas is introducing the blowing agent in parent metal in liquid state. A blowing agent is defined as a material that decomposes under the presence of heat and releases gas which then propels the foaming process. The quality of final foam is influenced by several parameters such as composition, size and volume fraction of the blowing agent used. Different chemicals which can evolve gases such as carbonates and metal hydrides fit into the description of blowing agent. …
An Approach To Search The Potentiality Of Node In Bamboo Strip Reinforced Composites, Mohammad Irfan Iqbal, Rashed Al Mizan, Ayub Nabi Khan
An Approach To Search The Potentiality Of Node In Bamboo Strip Reinforced Composites, Mohammad Irfan Iqbal, Rashed Al Mizan, Ayub Nabi Khan
Journal of Metals, Materials and Minerals
Bamboo has recently entered the composite sector with some attractive labels such as 'green'. The current commercial manufacturing method of bamboo composite removes the node's portion of bamboo culm during bamboo processing. This method generates a high amount of solid waste materials along with processing complexity and the scientific merit of this practice is also questionable. This research investigates the effects of culm nodes on bamboo based composite properties. In this study an approach to produce bamboo strips reinforced epoxy composites and their mechanical properties (e.g. tensile, flexural and impact properties) were reported. It was demonstrated that mechanical properties of …
Preparation And Characterization Of Lake Pigments From Sappan Wood Using Thai Local Clays, Jitnapa Sirirak, Nattawan Worawannotai, Cheewita Suwanchawalit, Supanee Chayabutra
Preparation And Characterization Of Lake Pigments From Sappan Wood Using Thai Local Clays, Jitnapa Sirirak, Nattawan Worawannotai, Cheewita Suwanchawalit, Supanee Chayabutra
Journal of Metals, Materials and Minerals
Thai local clays: Munpoo clay (MC) and Dindang clay (DC) were utilized as the adsorbents for preparation of the lake pigments from sappan wood. The lake pigment which was prepared by using MC as the adsorbent (L-MC) appeared reddish-brown while a deeper reddish-brown color of the lake pigment (L-DC) was obtained by using DC as the adsorbent. Characterization of MC, DC, L-MC, and L-DC was accomplished by XRD, SEM, FT-IR, BET, TGA and UV-Vis DRS. The effects of adsorbent dosage, pH of sappan wood extract and time on the adsorption were also investigated. The results revealed that silicon oxide and …