Open Access. Powered by Scholars. Published by Universities.®
Materials Science and Engineering Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Keyword
-
- Microstructure (9)
- Chitosan (7)
- Rice husk ash (7)
- Mechanical properties (6)
- Hardness (5)
-
- Heat treatment (5)
- Coating (4)
- Oxidation (4)
- Sintering (4)
- Stainless steel (4)
- Adhesion (3)
- Fatigue (3)
- Glass-ceramics (3)
- Hydroxyapatite (3)
- Layer-by-layer (3)
- Polypropylene (3)
- Powder metallurgy (3)
- Precipitation (3)
- Silica (3)
- Strain rate (3)
- X-ray diffraction (3)
- AISI 4140 steel (2)
- Adsorption (2)
- And Nickel-Based Superalloy (2)
- Collagen (2)
- Corrosion (2)
- Cotton fabric (2)
- Cyclohexane (2)
- ECAP (2)
- EN AW 6082 aluminium alloy (2)
Articles 451 - 480 of 788
Full-Text Articles in Materials Science and Engineering
Poly(Ester Urethane)-Crosslinked Carboxymethylchitosan As A Highly Water Swollen Hydrogel, Nunthiya Deepuppha, Apiwat Kadnaim, Boonjira Rutnakornpituk, Metha Rutnakornpituk
Poly(Ester Urethane)-Crosslinked Carboxymethylchitosan As A Highly Water Swollen Hydrogel, Nunthiya Deepuppha, Apiwat Kadnaim, Boonjira Rutnakornpituk, Metha Rutnakornpituk
Journal of Metals, Materials and Minerals
This work focused on the synthesis and characterization of carboxymethylchitosan (CMC)-based hydrogels modified with polyester-containing polyurethane (PU). The polyester was first synthesized from the condensation between 1,6-hexane diol and malonic acid, then reacted with an excess of 1,6-hexamethylene diisocyanate (HDI), and followed by the reaction with ethylene glycol as a chain extender to gain PU. CMC was chemically crosslinked with a water soluble crosslinker in the presence of 1-60 wt% of PU to obtain highly water swollen CMC hydrogels. Upon addition of PU, the CMC hydrogel showed excellent water swellability (up to 400 times of the dried weight), and it …
The Luminescence, Optical, And Structural Properties Of Srmoo4:Ce3+ Phosphor For Photonics Material Applications, Eakgapon Kaewnuam, Nuanthip Wantana, Sasithorn Saikaew, Jakrapong Kaewkhao
The Luminescence, Optical, And Structural Properties Of Srmoo4:Ce3+ Phosphor For Photonics Material Applications, Eakgapon Kaewnuam, Nuanthip Wantana, Sasithorn Saikaew, Jakrapong Kaewkhao
Journal of Metals, Materials and Minerals
SrMoO4:Ce3+ phosphors with different Ce2O3 concentration were studied in the structure, optical and luminescence properties. The phosphor powders were synthesized by a solid-state reaction to investigate with the XRD, FTIR, absorption and emission spectra measurement. The XRD patterns confirm the tetragonal crystalline structure of SrMoO4 host composition. The FTIR spectra show the dominant vibrations of tetrahedral [MoO4]2- unit in powders. These phosphors absorb photons in the range of ultraviolet and visible light proved by the absorption spectra. The emission spectra represent the strongest emission at 421 nm wavelength of phosphors under 266 nm excitation. This emission occurred under the transition …
Defects Of The Steel Billet In Continuous Casting, Anh-Hoa Bui, Van-Hung Nguyen
Defects Of The Steel Billet In Continuous Casting, Anh-Hoa Bui, Van-Hung Nguyen
Journal of Metals, Materials and Minerals
In continuous casting process, defects of the steel billet (e.g. crack, pinhole, blowhole, central shrinkage, slag entrapment and appearance deviation, etc.) negatively affect the quality and the yield of rolled products. This research has been carried out to investigate some defects which often occurred in Vietnamese steel plants. The experimental work was conducted in an industrial 4-strands continuous casting machine with the billet's cross-section of 130×130 mm2 . The position, generating cause identification of these defects and proper measures have been discussed. A change in the steel compositions and the water distribution during secondary cooling was applied to improve the …
Sm3+ Ions Doped Zinc Barium Tellurite Oxyfluoride Glasses For Laser Materials, Yaowalak Yamsuk, Patarawagee Yasaka, Jakrapong Kaewkhao, Narong Sangwaranatee
Sm3+ Ions Doped Zinc Barium Tellurite Oxyfluoride Glasses For Laser Materials, Yaowalak Yamsuk, Patarawagee Yasaka, Jakrapong Kaewkhao, Narong Sangwaranatee
Journal of Metals, Materials and Minerals
The Sm3+ ions were doped tellurite glasses with composition (55-x) TeO2-10ZnF2- 35BaO-xSm2O3 (where x = 0.00, 0.05, 0.10, 0.50, 1.00 and 1.50 in mol%) to investigate the physical, the optical, the luminescence and structural properties. The functional groups can be identified using FT-IR spectra of Sm3+ in the glasses. The most intense peak from emission spectra is at 600 nm (4G5/26H7/2) corresponding to reddish-orange color. The oscillator strengths were resolved from the absorption spectra and then used to calculate the Judd - Ofelt (J - O) intensity parameters. The radiative properties were calculated by J - O intensity parameters for …
The Water Permeability Properties Of Re-Vibrated Lightweight Concrete, Muayad Mohammed Kassim
The Water Permeability Properties Of Re-Vibrated Lightweight Concrete, Muayad Mohammed Kassim
Journal of Metals, Materials and Minerals
Re-vibration of sequential layers of relatively deep structural members after a particular time harms the strength and water permeability properties of the concrete. The harmful effects can be observed in lightweight concrete due to the floating tendency of lightweight aggregate. In this experimental study, the influence of adding retarder plasticizer and silica fume on water permeability properties of re-vibrated lightweight concrete was investigated. The effects of re-vibration at different time lags on compressive strength and permeable voids ratio were studied. Absorption, sorptivity, and water penetration depth under pressure were also studied. Results show that the addition of a retarder increased …
Physical Property And Compressive Strength Of Fired Clay Bricks Incorporated With Paper Waste, Anuwat Srisuwan, Nonthaphong Phonphuak
Physical Property And Compressive Strength Of Fired Clay Bricks Incorporated With Paper Waste, Anuwat Srisuwan, Nonthaphong Phonphuak
Journal of Metals, Materials and Minerals
This research is intended to evaluate the effects of paper waste addition on the physical properties and strength of fired clay bricks. Paper waste was mixed with clay in the ratios of 2.5, 5.0, 7.5 and 10 wt%. Green bricks were fired with different variations of temperature from 900-1100C for1 h in air. Fired bricks were then analyzed for physical and mechanical properties. Porosity was increased with higher paper waste content. An increase in porosity relatedly created lower density and higher shrinkage values. Additionally, porous content in fired clay bricks correlated to the deterioration of the compressive strength, due to …
Structural Studies Of Natural Zeolites And Optimizations For Water Hardness Softening Media, Tesfamariam Teklu Gebretsadik, Teklit Kidane Gebremedhin
Structural Studies Of Natural Zeolites And Optimizations For Water Hardness Softening Media, Tesfamariam Teklu Gebretsadik, Teklit Kidane Gebremedhin
Journal of Metals, Materials and Minerals
This study was aimed at investigating the mineralogical composition and structural features of natural zeolites using XRF, XRD, TGA, FT-IR and SEM. Natural zeolites were subjected to acid-activation and subsequently with NaCl salt to enhance surface area for water hardness softening applications. Peaks around 3560 and 1650 cm-1 belongs to O - H stretching and O - H bending vibrations which confirmed the presence of moisture within zeolite structures. This result was further supported by evolution of moisture above 108°C from thermogravimetric analysis. Fibrous structures which are full of rough texture were examined by SEM. The XRD pattern confirmed Stellerite …
Development Of Sr/Cao Catalyst Derived From Cuttlebone (Sepia Officinalis) For Biodiesel Production, Napat Tomano, Apisit Prokaew, Supakorn Boonyuen, Sarute Ummartyotin
Development Of Sr/Cao Catalyst Derived From Cuttlebone (Sepia Officinalis) For Biodiesel Production, Napat Tomano, Apisit Prokaew, Supakorn Boonyuen, Sarute Ummartyotin
Journal of Metals, Materials and Minerals
Cuttlebone (Sepia officinalis) was used as a source of calcium oxide for biodiesel catalyst. The objective of this work is to present the bio-based catalyst prepared from cuttlebone. 1, 3, 5 and 10 %wt of strontium was loaded into calcium oxide powder derived from cuttlebone. Structural properties of Sr/CaO catalyst were evaluated by Fourier transform infrared and X-ray diffraction, respectively. There is no change on morphological properties of catalyst between Sr/CaO and pristine CaO. The homogeneous distribution of strontium was confirmed by EDX mapping technique. The specific surface area of powder was estimated to be 10-30 m2 ·g-1. The thermal …
Investigation Of Crosslink Structure Of Natural Rubber During Vulcanization Using X-Ray Absorption Near Edge Spectroscopy, Kanoktip Boonkerd, Wanwisa Limphirat
Investigation Of Crosslink Structure Of Natural Rubber During Vulcanization Using X-Ray Absorption Near Edge Spectroscopy, Kanoktip Boonkerd, Wanwisa Limphirat
Journal of Metals, Materials and Minerals
The X-ray absorption near edge spectroscopy technique (XANES) has been applied to determine the crosslinking structure of natural rubber (NR) during sulfur vulcanization process. The NR samples were prepared using DCBS as an accelerator at different sulfur to DCBS ratios (from 0.26 to 6.67). The results showed that with increasing cure time from tc50 to tc70, tc90 and tc100 the position of sulfur peak shifted to higher energy. This implied that the amount of polysulfidic crosslink gradually decreased with increasing cure time. This result supported the crosslinking mechanism proposed in the literature at which the polysulfidic crosslink is dominating at …
Influence Of Poly(Butylene Terephthalate) And Wollastonite On Properties Of Recycled Poly(Ethylene Terephthalate) Preforms, Phasawat Chaiwutthinan, Thaksaporn Riyaphan, Athapon Simpraditpan, Amnouy Larpkasemsuk
Influence Of Poly(Butylene Terephthalate) And Wollastonite On Properties Of Recycled Poly(Ethylene Terephthalate) Preforms, Phasawat Chaiwutthinan, Thaksaporn Riyaphan, Athapon Simpraditpan, Amnouy Larpkasemsuk
Journal of Metals, Materials and Minerals
Influence of poly(butylene terephthalate) (PBT) and wollastonite (WLN) on properties of recycled poly(ethylene terephthalate) (RPET) was investigated. RPET was first melt-mixed with PBT at five loadings (10-50 wt%) on a twin screw extruder, and then injection molded. Scanning electron micrographs showed the immiscible blends. The blends at 10-40 wt% PBT displayed droplet-matrix morphology, while the blend at 50 wt% PBT showed a matrix inversion. All blends showed a PBT-dosedependent increase in impact strength and Young's modulus with an expense of tensile strength and elongation at break. Among five RPET/PBT blends, the one at 40 wt% PBT exhibited the good balanced …
On The Corrosion Behaviour Of As-Cast And Heat-Treated Mg-Re Alloys In 0.9% Nacl Solution, Abdelkader Hanna, Lyacine Rabahi, Mohamed Amine Soualili, Achour Dakhouche, Djamel Bradai, Hiba Azzeddine
On The Corrosion Behaviour Of As-Cast And Heat-Treated Mg-Re Alloys In 0.9% Nacl Solution, Abdelkader Hanna, Lyacine Rabahi, Mohamed Amine Soualili, Achour Dakhouche, Djamel Bradai, Hiba Azzeddine
Journal of Metals, Materials and Minerals
The microstructure and corrosion behaviour of as-cast and heat-treated Mg-1.44Nd and Mg-1.43Ce (wt.%) alloys in 0.9% NaCl (wt.%) solution were investigated using electrochemical tests, X-ray diffraction (XRD) and scanning electron microscopy, combined with energy-dispersive X-ray spectroscopy (SEM-EDS). The as-cast microstructure of both alloys revealed the presence of second phases. Heat treatment at 535°C for 6 h led to a more uniform distribution of the second phases in Mg-1.44Nd alloy and their dissolution along the grains boundaries in the Mg-1.43Ce alloy. As a result, the corrosion resistance was improved in the heat-treated alloys. Accordingly, the corrosion resistance values for the heat-treated …
Numerical Modeling Of Longwall Top Coal Caving Method At Thar Coalfield, Niaz Muhammad Shahani, Zhijun Wan, Xigui Zheng, Li Guichen, Cancan Liu, Fahad Irfan Siddiqui, Gu Bin
Numerical Modeling Of Longwall Top Coal Caving Method At Thar Coalfield, Niaz Muhammad Shahani, Zhijun Wan, Xigui Zheng, Li Guichen, Cancan Liu, Fahad Irfan Siddiqui, Gu Bin
Journal of Metals, Materials and Minerals
Thar Coalfield in Pakistan is the largest reserve of lignite coal in the country, which is outlined by thick coal seams. The preferred mining method for these thick coal seams is the Longwall Top Coal Caving (LTCC). The connection of both the top coal caving and its compactness are still rare; therefore, the capability of top coal caving mechanism is the most significant factor in LTCC that must be adequately explained and examined. Moreover, in order to achieve the ideal coal production, a comprehensive modeling of deformation and induced stress is mandatory. In this study, a 12 m thick coal …
Corrosion Of Ecaped Magnesium Alloys And Its Background: A Review, G Manjunath Naik, N Sannayellappa, S Selvin Satheesh Kumar
Corrosion Of Ecaped Magnesium Alloys And Its Background: A Review, G Manjunath Naik, N Sannayellappa, S Selvin Satheesh Kumar
Journal of Metals, Materials and Minerals
The aim of this review article is to provide a brief mechanistic overview of magnesium alloys, equal channel angular pressing and corrosion behavior of un-ECAPed and ECAPed Mg alloys. The considerate of the corrosion processes of ECAPed Mg alloys builds upon interpretation of the corrosion of fine-grain magnesium alloys. This provides an understanding of the effect of grain size on corrosion of Mg alloys. This deep understanding is essential as a foundation if we are to produce corrosion-resistant magnesium alloys. Considerable has previously been accomplished, but there is enormous scope for development. This present concise review can provide a foundation …
Corrosion Behaviors Of Ship Structural Steel In Simulated Marine Tidal Environment, N Jaiyos, E Viyanit, P Mungsantisuk, K Sirivedin
Corrosion Behaviors Of Ship Structural Steel In Simulated Marine Tidal Environment, N Jaiyos, E Viyanit, P Mungsantisuk, K Sirivedin
Journal of Metals, Materials and Minerals
The tidal zone is severe marine environment for steel structures due to its wet-dry cyclic corrosion pattern. Regarding a specific application for inner ship hull, ship structural steel is always prone to corrosion dealing with three marine environments, including atmospheric, tidal, and immersion zones. Therefore, the current study aimed to investigate corrosion behaviors of two commercial ship structural steels, i.e. alloys A and B, which were exposed to simulated marine tidal environment. The effects of specimen arrangements designated as the isolated short-scale and vertical long-scale specimens were also determined. Based on weight loss determination, it revealed that the corrosion rates …
Effect Of Post Weld Heat Treatment Soaking Time On Microstructure And Mechanical Properties Of Tig Welded Grade 91 Steel, K Mithun, K Saraswathamma, D K. Verma
Effect Of Post Weld Heat Treatment Soaking Time On Microstructure And Mechanical Properties Of Tig Welded Grade 91 Steel, K Mithun, K Saraswathamma, D K. Verma
Journal of Metals, Materials and Minerals
Development of new alloy materials is in progress to improve thermal efficiency of supercritical boilers. One of such material is modified 9Cr-1Mo (Grade 91) martensitic alloy steel referred as T/P91. This material is extensively used in high temperature applications such as fabrication of superheater, reheater and economizer sections of a boiler. The present study is made to find the effect of post weld heat treatment (PWHT) soaking time on microstructure and mechanical properties of TIG welded ASTM A213 Grade 91 steel plate. Experiments were conducted for PWHT at 760°C for different soaking time such as 2, 4 and 6 hours …
Synthesis And Luminescence Properties Of Camoo4:Sm3+ Phosphors For Orange Photonic Materials, N Luewarasirikul, J Kaewkhao, H Kim
Synthesis And Luminescence Properties Of Camoo4:Sm3+ Phosphors For Orange Photonic Materials, N Luewarasirikul, J Kaewkhao, H Kim
Journal of Metals, Materials and Minerals
The series of CaMoO4 samples with different melting temperature (600, 700, 800 and 900°C) were synthesized in this work to investigate their phase structures by X-ray diffraction (XRD). The XRD result confirmed that the crystalline structures of the phosphors were obtained at 800°C (tetragonal structure with I41/a space group). Then, the series of Ca1-xMoO4:Smx (where x = 0.005, 0.010, 0.015, 0.020, 0.025 and 0.030) were prepared by solid-state reaction method to study their luminescence properties. The absorption spectra, recorded in UV, Vis and NIR regions, showed peaks at 405, 465, 952, 1096, 1252, 1405, 1513, 1573 and 1629 nm. The …
Physical And Strength Properties Of Fe/Sic Composites Under Microwave Hybrid Sintering Method, Sn A. Daud, S M. Tahir, M S. Anuar, Cn A. Jaafar, Mz M. Yusoff
Physical And Strength Properties Of Fe/Sic Composites Under Microwave Hybrid Sintering Method, Sn A. Daud, S M. Tahir, M S. Anuar, Cn A. Jaafar, Mz M. Yusoff
Journal of Metals, Materials and Minerals
Two different methods for the sintering of Fe/SiC composite prepared via uniaxial powder compaction are investigated in this work; the conventional furnace sintering and the microwave hybrid sintering methods. The important variables considered are the compositions of SiC in the Fe/SiC composite and the sintering temperatures used. The compositions of the SiC in the Fe/SiC used are 0, 10 and 20 wt. % and the sintering temperatures used are 1000°C, 1050°C, 1100°C and 1200°C. Damaged samples are obtained at the sintering temperatures of 1100°C and 1200°C for microwave hybrid method. For the undamaged samples obtained at 1000°C and 1050°C sintering …
Wood Plastic Composites Based On Recycled Poly(Ethylene Terephthalate) And Poly(Butylene Adipate-Co-Terephthalate), P Chaiwutthinan, A Pimpong, A Larpkasemsuk, S Chuayjuljit, A Boonmahitthisud
Wood Plastic Composites Based On Recycled Poly(Ethylene Terephthalate) And Poly(Butylene Adipate-Co-Terephthalate), P Chaiwutthinan, A Pimpong, A Larpkasemsuk, S Chuayjuljit, A Boonmahitthisud
Journal of Metals, Materials and Minerals
In this work, wood plastic composites (WPCs) were prepared from a selected recycled poly(ethylene terephthalate) (rPET)/poly(butylene adipate-co-terephthalate) (PBAT) blend ratio. The 70/30 (wt%/wt%) (rPET)/PBAT blend was incorporated with six loadings of wood flour (WF) (5 - 30 wt%) through melt mixing on a twin screw extruder, followed by injection molding. The mechanical properties of the WPCs, in terms of the impact, tensile and flexural strength, Young's modulus and elongation at break were determined as a function of the WF content. The results showed that the impact strength and elongation at break of the WPCs were all lower than those of …
The Use Of Reclaimed Rubber From Waste Tires For Production Of Dynamically Cured Natural Rubber/Reclaimed Rubber/Polypropylene Blends: Effect Of Reclaimed Rubber Loading, A Thitithammawong, C Hayichelaeh, W Nakason, N Jehvoh
The Use Of Reclaimed Rubber From Waste Tires For Production Of Dynamically Cured Natural Rubber/Reclaimed Rubber/Polypropylene Blends: Effect Of Reclaimed Rubber Loading, A Thitithammawong, C Hayichelaeh, W Nakason, N Jehvoh
Journal of Metals, Materials and Minerals
Reclaimed rubber (RR) from waste tires was introduced into thermoplastic vulcanizates (TPVs) based on blends of natural rubber (NR)/RR/polypropylene (PP). The curing characteristics of NR/RR compounds together with properties of TPVs, i.e., mixing and dynamic vulcanization behaviors and mechanical, dynamic and morphological properties, were investigated with respect to RR content. The results show that the RR affects static and dynamic vulcanization of rubber molecules by increasing cure rate but lowers curing efficiency. Increasing the RR content in NR/RR/PP TPVs slightly reduces tensile strength but with a sharp impact on elongation at break. Dynamic properties reveal that elastomeric response of NR/RR/PP …
One Step Pressing-Annealing To Produce Ltp Mnbi Magnets, T Charoensuk, A Tamman, P Jantaratana, S Abbasi, C Sirisathitkul
One Step Pressing-Annealing To Produce Ltp Mnbi Magnets, T Charoensuk, A Tamman, P Jantaratana, S Abbasi, C Sirisathitkul
Journal of Metals, Materials and Minerals
The production process for the high-purity low-temperature-phase (LTP) manganese bismuth (MnBi) magnets requires arc-melting, grinding and annealing materials under inert atmosphere. However, the formation of MnO is practically unavoidable during these steps since both Mn and MnBi are easily oxidized even by trace amounts of oxygen. In this work, an oxygen-free pressing-annealing system is developed to facilitate the synthesis of LTP MnBi with minimal oxidization. The semi-automatic pressing is carried out by using the compression piston and the load cell is used to measure the pressing force. The copper plate and cylindrical container are heated by nichrome filament heating. Mn …
Use Of Steam Explosion As A Green Alternative Method To Prepare Pulp From Pineapple Leaves, S Tanpichai, A Boonmahitthisud, S Witayakran
Use Of Steam Explosion As A Green Alternative Method To Prepare Pulp From Pineapple Leaves, S Tanpichai, A Boonmahitthisud, S Witayakran
Journal of Metals, Materials and Minerals
The use of agricultural wastes as an alternative form of the cellulosic material to wood has gained considerable attention due to the reduction of deforestation. After cultivation, a large number of pineapple leaves are considered as a waste. Here, the potential steam explosion process was used as a green alternative way to prepare pulp from pineapple leaves without any addition of the chemical treatments. The pineapple leaf fibers were defibrillated from fiber bundles due to the rapid depressurization with the steam pressure between 16 and 20 kgf·cm-2. The partly removal of hemicellulose and lignin associated with the increase of the …
Modification Of Optical And Structural Properties Of Dc Magnetron Sputtered Tungsten Oxide Thin Films For Electrochromic Application, P Yaemsanguansak, M Sittishoktram, R Tuayjaroen, E Ketsombun, T Lertvanithphol, C Luangchaisri, T Jutarosaga
Modification Of Optical And Structural Properties Of Dc Magnetron Sputtered Tungsten Oxide Thin Films For Electrochromic Application, P Yaemsanguansak, M Sittishoktram, R Tuayjaroen, E Ketsombun, T Lertvanithphol, C Luangchaisri, T Jutarosaga
Journal of Metals, Materials and Minerals
The optical properties of tungsten oxide thin films prepared by a reactive DC magnetron sputtering technique were investigated. The influences of O2 flow rates (15 and 18 sccm) and DC sputtering powers (5, 15 and 25 W) on the optical properties of 200 nm-thick tungsten oxide films on indium tin oxide substrates (WO3/ITO/glass) were investigated using UV-visible spectrophotometer. The results indicated that the transmission modulation in visible region between colored state and bleached state of the films increased significantly with decreasing DC sputtering power and increasing O2 flow rate. The results corresponded with the increase of film roughness and density …
Piezoceramic-Polymer And Piezoceramic-Cement Composites: A Brief Review, S Inthong, S Eitssayeam, J Tontrakoon, T Tunkasiri
Piezoceramic-Polymer And Piezoceramic-Cement Composites: A Brief Review, S Inthong, S Eitssayeam, J Tontrakoon, T Tunkasiri
Journal of Metals, Materials and Minerals
The physical properties of piezoceramic-polymers and lead-based or lead-free - Portland cement or geopolymer are described as part of this brief review. The connectivities such as 0-3, 1-3, 2-2 and 3-3 were employed to fabricate the composites. Their physical properties such as dielectric, coupling constant, acoustic impedance etc. were measured. The acoustic impedance obtained from the PZT-epoxy resin (0-3/1-3 connectivity) showed quite low. This can be further developed to match with water or human tissue for both hydrophone and medical applications. The properties of the composites containing leadbased or lead-free cement or geopolymer were also revealed. The results prove that …
Isothermal Aging Of Al-Ni-Sc Alloy Containing Al3ni Microfibers And Al3sc Nanoprecipitates, C Suwanpreecha, J P. Toinin, P Pandee, D C. Dunand, C Limmaneevichitr
Isothermal Aging Of Al-Ni-Sc Alloy Containing Al3ni Microfibers And Al3sc Nanoprecipitates, C Suwanpreecha, J P. Toinin, P Pandee, D C. Dunand, C Limmaneevichitr
Journal of Metals, Materials and Minerals
Binary Al-Sc alloys have excellent strength at room and elevated temperature up to 300°C due to coherent of Al3Sc nanoprecipitates. Binary Al-Ni alloys are an alternative alloy for high-temperature applications owing to high-thermal stability of Al3Ni microfibers. In this study, the hardness evolution at 300°C for up to 672 h for eutectic ternary Al-6Ni-0.4Sc (wt%) was studied and compared with binary Al-0.4Sc and Al-6Ni alloys. The Al-6Ni alloy maintains a constant hardness after aging at 300°C up to 672 h. Both Al-0.4Sc and Al-6Ni-0.4Sc alloys show strong precipitation strengthening response, with peak hardness reached after about 3 h aging, due …
Evaluating The Grinding Process Of Granites Using The Physico-Mechanical And Mineralogical Properties, S Kahraman, M Ucurum, E Yogurtcuoglu, M Fener
Evaluating The Grinding Process Of Granites Using The Physico-Mechanical And Mineralogical Properties, S Kahraman, M Ucurum, E Yogurtcuoglu, M Fener
Journal of Metals, Materials and Minerals
Granitic rocks are sometimes ground for different purposes. Predicting the mean particle size (d50) is useful for planning and cost estimation of purposes. In order to investigate the possibility of predicting the d50 of ground rock from the physico-mechanical rock properties, six different granites were tested in the laboratory. First, the d50 values were correlated with the corresponding physico-mechanical properties. The simple regression analysis showed that there were no good correlations between the d50 and the physico-mechanical properties. Then, the multiple regression analysis was carried out and strong prediction equations were developed. It was also shown that the dominant parameter …
Optical And Luminescence Investigation Of Er3+ Doped In Na2o-Al2o3-P2o5 Glasses For Photonics Material Application, N Chanthima, N Kiwsakunkran, J Kaewkhao, N Sangwaranatee
Optical And Luminescence Investigation Of Er3+ Doped In Na2o-Al2o3-P2o5 Glasses For Photonics Material Application, N Chanthima, N Kiwsakunkran, J Kaewkhao, N Sangwaranatee
Journal of Metals, Materials and Minerals
Optical and photoluminescence properties of Er3+ doped Na2O-Al2O3-P2O5 (NAPEr) glasses were prepared by conventional melt quenching technique at 1200°C. The absorption spectra have 11 peaks corresponded to 4I15/2 ground state to various excited energy levels. The absorption band at 1537 nm shows highest intensity in near-infrared (NIR) region. Also, it can be observed that the intensity of absorption bands increased on increase in concentrations of Er2O3. The Judd-Ofelt (JO) parameters (Ωλ, λ = 2, 4, and 6) are calculated using the absorption bands of the Er2O3 doped glass compositions. McCumber theory has been applied to determine the emission cross-sections (σe) …
Effect Of Humic Acid Extracted From Thailand's Leonardite On Rice Growth, B Jomhataikool, K Faungnawakij, S Kuboon, W Kraithong, S Chutipaichit, M Fuji, A Eiad-Ua
Effect Of Humic Acid Extracted From Thailand's Leonardite On Rice Growth, B Jomhataikool, K Faungnawakij, S Kuboon, W Kraithong, S Chutipaichit, M Fuji, A Eiad-Ua
Journal of Metals, Materials and Minerals
Humic acid have been successfully extracted from leonardite using base-acid treatment. Humic acid is an essential part of soil. This material, present in good soil, makes available of uptake to the plant and the soil nutrients for improving the physical structure of the soil. To extract humic and fulvic acid, the Leonardite is processed in a strongly basic aqueous solution. To precipitate the humic acid, the solution is adjusted to pH 1 with a mineral acid. Carbon, Oxygen, Nitrogen, Aluminium, Silicon and Potassium were extracted from humic acid in humate form (Humic acid reacted with KOH). Rice grower have expressed …
Investigation Of Dissimilar Joining Ferritic Stainless Steel 430 To Austenitic Stainless Steel 304 By Transient Liquid Phase Bonding Process, H Nasri Nasrabadi, M Kasiri Asgarani, K Amini
Investigation Of Dissimilar Joining Ferritic Stainless Steel 430 To Austenitic Stainless Steel 304 By Transient Liquid Phase Bonding Process, H Nasri Nasrabadi, M Kasiri Asgarani, K Amini
Journal of Metals, Materials and Minerals
In this study, dissimilar joining of ferritic stainless steel 430 with austenitic stainless steel 304 with BNi-2 Interlayer was investigated by the joint process of the transient liquid phase under inert gas. The joint process was carried out at a constant temperature of 1120°C and at four storage times of 30, 60, 120 and 180 min. To investigate the microscopic structure of the optical microscope, a scanning electron microscope and an X-ray diffraction spectroscopy were used to investigate the mechanical properties of the microhardness and stretching device. At 120 min of storage, due to the proper penetration of the interlayer …
Structural Integrity Assessment Of Tufted Textile Composite And Its Comparison With Laminated Textile Composite, A Saboktakin, A Ghasemi, H Mohammadi
Structural Integrity Assessment Of Tufted Textile Composite And Its Comparison With Laminated Textile Composite, A Saboktakin, A Ghasemi, H Mohammadi
Journal of Metals, Materials and Minerals
Three dimensional composites have been used in aerospace industry to improve interlaminar strength. This paper evaluates the 3D tufted composites from aspect of their mechanical properties. The tufted composite panel was manufactured based on polyester resin as well as an untufted laminated composite for comparison purposes. Experiments show that specimens with transverse tufting suffer slighter reduction in the tensile strength than longitudinal tufting. The tufted composites are found lower tensile strength compared with laminated composite samples accompanied with slight improvement in the compression strength and high strain rate tensile strength. The experimental results presented in this paper should be valuable …
Thermal Correction Judd-Ofelt Analyze Of Eu3+ Ion Doped Calcium Gadolinium Silicoborate Oxyfluoride Glass, N Wantana, Y Ruangtaweep, J Kaewkhao
Thermal Correction Judd-Ofelt Analyze Of Eu3+ Ion Doped Calcium Gadolinium Silicoborate Oxyfluoride Glass, N Wantana, Y Ruangtaweep, J Kaewkhao
Journal of Metals, Materials and Minerals
The Calcium Gadolinium Silicoborate Oxyfluoride glass doped with 1.0 mol% of Eu3+ concentration. (CaGdSiBF:Eu3+) was prepared by a melt quenching technique for study in the absorption and emission properties. Glass absorbed photon in ultraviolet, visible light and near infrared regions. The excitation with 275 nm of Gd3+ show the strongest red emission at 613 nm from 5D0→7F2 transition. The Judd-Ofelt (J-O) intensity parameters are derived from the integrated area under absorption and emission, including the refractive index. The thermal correction was used to improve J-O analysis from an uncertainty of Eu3+ population on the ground state. The spectroscopic results were …