Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Civil and Environmental Engineering (788)
- Materials Science and Engineering (665)
- Chemical Engineering (656)
- Physical Sciences and Mathematics (462)
- Operations Research, Systems Engineering and Industrial Engineering (375)
-
- Industrial Engineering (372)
- Electrical and Computer Engineering (358)
- Operational Research (307)
- Civil Engineering (274)
- Construction Engineering and Management (274)
- Electrical and Electronics (264)
- Engineering Science and Materials (261)
- Computer Engineering (243)
- Computer Sciences (235)
- Social and Behavioral Sciences (217)
- Environmental Sciences (216)
- Environmental Studies (216)
- Environmental Engineering (161)
- Mechanical Engineering (102)
- Applied Mechanics (101)
- Engineering Mechanics (100)
- Petroleum Engineering (88)
- Power and Energy (86)
- Biomedical Engineering and Bioengineering (40)
- Polymer Science (40)
- Geological Engineering (39)
- Metallurgy (39)
- Mining Engineering (39)
- Risk Analysis (38)
- 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)
- Precipitation (3)
- Silica (3)
- Strain rate (3)
- X-ray diffraction (3)
- คลังสินค้า (3)
- AISI 4140 steel (2)
- Adsorption (2)
- And Nickel-Based Superalloy (2)
- Collagen (2)
- Cotton fabric (2)
- Cyclohexane (2)
- ECAP (2)
- EN AW 6082 aluminium alloy (2)
- Electrochemical technique (2)
- Publication Year
- Publication
- Publication Type
Articles 3241 - 3270 of 3414
Full-Text Articles in Engineering
Corrosion Prevention Of Rebar In Concrete Due To Chloride, Y Srimahajariyaphong, S Niltawach
Corrosion Prevention Of Rebar In Concrete Due To Chloride, Y Srimahajariyaphong, S Niltawach
Journal of Metals, Materials and Minerals
In coastal and brackish areas, black rebar in concrete structures suffers from chloride corrosion which leads to spalling of the concrete. The Half Cell Potential Measurement technique has been applied to study the corrosion behavior of both black and galvanized deformed rebar in different concretes. Additives in the concretes vary from pozzolan, calcium nitrite, to pozzolan plus calcium nitrite. Rebar which has higher half cell potential possesses better corrosion resistance. It has been found that concrete cover thickness has no significant effect on the half cell potential of either rebar; that for both types of rebar, the half cell potential …
Design And Construction Of Water Atomizer For Making Metal Powder, S Yenwiset, T Yenwiset
Design And Construction Of Water Atomizer For Making Metal Powder, S Yenwiset, T Yenwiset
Journal of Metals, Materials and Minerals
Water Atomization for metal powder is an appropriate method for producing metal powder from different kinds of metal. Typically, a water atomizing machine is designed with a molten metal spraying chamber in a vertical or horizontal orientation depending on a nozzle design, a molten metal spraying chamber and related components. The main variables influencing the working condition of the water atomization process, which affect sizes, shapes and distribution of metal powder particles, are water pressure, water flow rate, a temperature higher than melting point of liquid metal and flow rate of liquid metal. The water atomizing machine in the study …
Applying Computer Simulation In Improving Heat Treating Condition Of Thin High-Carbon Steel Parts, T Korad, M Polboon, N Chumchery, J Pearce
Applying Computer Simulation In Improving Heat Treating Condition Of Thin High-Carbon Steel Parts, T Korad, M Polboon, N Chumchery, J Pearce
Journal of Metals, Materials and Minerals
The study was carried out using COSMOSFlowWorks to predict heat treatment conditions for AISI 1085 high-carbon steel sheet that is used to produce automotive parts that require wear resistance and stiffness resulting from controlled moderately high hardness levels. To achieve such properties, flat high-carbon steel parts need to be hardened to produce acicular matrix structures, and the most suitable heat treatment process to harden thin parts without distortion is austempering. In producing hard and stiff thin section parts in this company study the austempering process was performed by soaking at 830C and then quenching in a NaCl salt bath at …
Self-Crack Closing Ability Of Mortar With Different Additives, D Jaroenratanapirom, R Sahamitmongkol
Self-Crack Closing Ability Of Mortar With Different Additives, D Jaroenratanapirom, R Sahamitmongkol
Journal of Metals, Materials and Minerals
Self-crack closing ability of cementitious materials has been studied in various aspects. However, most studies focus mainly on the cementitious material with only cement as a binder (without mineral additives), although many additives are commonly used at present. This research thus aims to investigate the effect of additives on this self-crack closing ability by observing and measuring crack width on the mortar specimens. Cracks were created on mortar specimens by splitting method at the age of 3 and 28 days. As most reports show that the best self-crack closing performance was achieved when a plenty of water was supplied, the …
Purification Of An Industrial Aluminum Alloy By Melt Stirring During Ohno Continuous Casting Process, S Fashu, L Jianguo, H Q. Dan
Purification Of An Industrial Aluminum Alloy By Melt Stirring During Ohno Continuous Casting Process, S Fashu, L Jianguo, H Q. Dan
Journal of Metals, Materials and Minerals
With the purpose of upgrading the purity of a dilute industrial aluminum alloy during Ohno Continuous Casting (OCC) process through the use of forced melt stirring; the critical stirring intensity required under a casting speed of 2 mm/min was numerically determined. The determined critical stirring intensity induces convective velocity magnitudes into the melt which are effective in transporting solutes from the solute boundary layer into the bulk melt. It was found that, with adequate melt stirring, production of substantially long and high purity ingots during OCC is possible before their purity diminishes to lower than the initial alloy purity.
Effect Of Nitrogen Partial Pressure On Characteristic And Mechanical Properties Of Hard Coating Tialn Film, C Chokwatvikul, S Larpkiattaworn, S Surinphong, C Busabok, P Termsuksawad
Effect Of Nitrogen Partial Pressure On Characteristic And Mechanical Properties Of Hard Coating Tialn Film, C Chokwatvikul, S Larpkiattaworn, S Surinphong, C Busabok, P Termsuksawad
Journal of Metals, Materials and Minerals
(Ti,Al)N coating has been serving for the industry as cutting and forming tools. Compared with TiN film, TiAlN film significantly increases tool lifetime. Therefore, it reduces machine downtime and increases productivity. In this work, (Ti,Al)N film was deposited on cold-work tool steel (SKD 11) using PVD cathodic arc system. The sintered Ti-Al target with composition of (at%) 50 Ti and 50 Al was used as a cathode. The deposition bias voltage, bias arc current and deposition time were set at 100 V, 70 A and 90 minutes, respectively. Nitrogen gas was purged into the system with the applied pressure of …
Modification Of Montmorillonite With A Cationic Softener For Finishing Cotton Fabric With Hand Builder Performance, S Kittinaovarat, N Jiratumnukul, N Koolpreechanan
Modification Of Montmorillonite With A Cationic Softener For Finishing Cotton Fabric With Hand Builder Performance, S Kittinaovarat, N Jiratumnukul, N Koolpreechanan
Journal of Metals, Materials and Minerals
Montmorillonite (Mont) was modified by cationic exchange with the cationic softener TEGO 28 (Di-Palm carboxyethyl hydroxyethyl methyl ammonium methosulfate). XRD analysis suggested that intercalation occurred in the modified Mont (mMont). Softening finishing solutions composed of pure TEGO 28 with and without mMont were treated on cotton fabrics by the pad-dry method and then evaluated for stiffness, whiteness, tear strength and thermal stability. TEGO 28 treatment alone increased the stiffness property of the finished fabrics, and this was increased further by the co-inclusion of mMont at 3 and 5% (w/v), but higher or lower mMont concentrations led to a marked and …
Development Of Composition Modulated Multilayer Alloy Coatings And Their Corrosion Behavior, S Yogesha, A C. Hegde
Development Of Composition Modulated Multilayer Alloy Coatings And Their Corrosion Behavior, S Yogesha, A C. Hegde
Journal of Metals, Materials and Minerals
Multilayer Zn-Ni alloy coating was developed on mild steel from acid chloride bath containing thiamine hydrochloride, as additive. Composition modulated multilayer alloy (CMMA) coatings, or simply, multilayer coating with gradual change in composition were developed galvanostatically using triangular current pulses from single bath technique. CMMA coatings of Zn-Ni were developed under different conditions, such as cyclic cathode current densities (CCCDs) and a number of layers, and their corrosion behaviors were evaluated by potentiodynamic polarization and electrochemical impedance spectroscopy method. Optimal configuration, (Zn-Ni)2.0/4.0/600 was found to exhibit ~50 times better corrosion resistance compared to monolayer (Zn-Ni)3.0 alloy, deposited from the same …
Effect Of Postweld Heat Treatment On Microstructures And Hardness Of Tig Weldment Between P22 And P91 Steels With Inconel 625 Filler Metal, N Tammasophon, W Homhrajai, G Lothongkum
Effect Of Postweld Heat Treatment On Microstructures And Hardness Of Tig Weldment Between P22 And P91 Steels With Inconel 625 Filler Metal, N Tammasophon, W Homhrajai, G Lothongkum
Journal of Metals, Materials and Minerals
This research aims at searching for the optimal postweld heat treatment condition of the TIG weld joint between P22 (2.25Cr) and P91 (9Cr) steels using Inconel 625 as filler metal. The postweld heat treatment at 750C for 2, 4 and 6 hours was applied in order to reach the proper microstructure and hardness for high performance in mechanical properties at elevated temperatures. It is recommended that postweld heat treatment at 750C for 2 hours is the proper condition to reduce the hardness of heat affected zone (HAZ) of P91 steel.
Separation Of Lycopene/Solvent Mixture By Chitosan Membranes, P Yodjun, K Soontarapa, C Eamchotchawalit
Separation Of Lycopene/Solvent Mixture By Chitosan Membranes, P Yodjun, K Soontarapa, C Eamchotchawalit
Journal of Metals, Materials and Minerals
Acetone in view of lower toxicity could be used as extracting solvent of lycopene in tomato paste instead of hexane. The studied chitosan membranes were uncrosslinked and crosslinked types. It was found that the membrane morphology could be changed from porous to dense structure by increasing evaporation temperature or time or by crosslinking. They showed hydrophilicity but not preferred to both acetone and lycopene. The lycopene/acetone mixture could be separated by using water swollen chitosan membrane in pervaporation process. It was found that all studied membranes; i.e., both uncrosslinked and ionically crosslinked membranes prepared at 40 to 60C for 2 …
Chevron Crack Initiation In Mullti-Pass Drawing Of Inclusion Copper Shaped-Wire, S Norasethasopon
Chevron Crack Initiation In Mullti-Pass Drawing Of Inclusion Copper Shaped-Wire, S Norasethasopon
Journal of Metals, Materials and Minerals
In the copper superfine wire drawing, the internal cracks such as chevron cracks and breakage of the wire were fatal to the success of quantitative drawing operations. This paper shows how the main process parameters, the drawing pass numbers, influence the plastic deformation, hydrostatic stress, maximum principal tensile stress and chevron cracks initiation investigated by FEM simulation. The effect of the lateral and longitudinal sizes of a central cylindrical inclusion in the multi-pass copper shaped-wire drawing was studied. The plastic deformation, plastic strain, hydrostatic stress and maximum principal tensile stress of the copper shaped-wire containing an inclusion were obtained from …
Determination Of Forming Limit Stress Diagram For Formability Prediction Of Spce 270 Steel Sheet, S Panich, V Uthaisangsuk, J Juntaratin, S Suranuntchai
Determination Of Forming Limit Stress Diagram For Formability Prediction Of Spce 270 Steel Sheet, S Panich, V Uthaisangsuk, J Juntaratin, S Suranuntchai
Journal of Metals, Materials and Minerals
The aim of this research is to apply numerical Finite Element Method (FEM) for determining Forming Limit Stress Diagram (FLSD) of sheet steel of grade SPCE 270. As a failure criterion for formability prediction in sheet metal forming process, the conventional Forming Limit Diagram (FLD) is often used. The FLD is a strain based criterion, by which the principal strains at failure are evaluated. Many investigations showed that the FLD is dependent on forming history and strain path. However, the stress based criterion does not confirm this dependency. This criterion is more robust against any changes in the strain path …
The Change Of Surface Alloy Compositions And Corrosion Behavior After Wedm Machining Of Commercially Pure Titanium (Grade 4) And Ti-6al-4v (Grade 5), K Sriprasertying, S Rhaiphu
The Change Of Surface Alloy Compositions And Corrosion Behavior After Wedm Machining Of Commercially Pure Titanium (Grade 4) And Ti-6al-4v (Grade 5), K Sriprasertying, S Rhaiphu
Journal of Metals, Materials and Minerals
Nowadays, titanium and its alloys are widely used in medical applications because of excellent corrosion resistance and a high strength-to-weight ratio. Nevertheless, titanium and its alloys are classified as difficult-to-machine metals by conventional machining methods. Therefore, unconventional machining processes are recommended. Wire-electrical discharge machining (WEDM) has become an important non-traditional machining process, as it provides an effective solution for machining components made from difficult-to-machine metals. However, WEDM could damage the surface layer and have an effect on the biocompatibility properties. This research was focused on the effect of WEDM on grade 4 commercially pure titanium and Ti-6Al-4V (Grade 5) after …
Improving Quench Hardening Of Low Carbon Steel, T Korad, M Polboon, N Chumchery, J Pearce
Improving Quench Hardening Of Low Carbon Steel, T Korad, M Polboon, N Chumchery, J Pearce
Journal of Metals, Materials and Minerals
The carbon content in steel determines whether it can be directly hardened. If the carbon content is low (less than 0.25wt%) then an alternate means exists to increase the carbon content of the surface. In this study, the mixed quenchant consisting of brine and surfactants known as Superquench was applied in the quench-hardening process on AISI 1015 low carbon steel. The quench results were compared with quenching in heavy brine solution, water and oil which are recognized as the basic quenchants and cannot cause bulk-hardening low-carbon steels. The hardness tests on different points along the radius of cut round bar …
Study Conditions Of Aluminum Billets For Relationship Between Precipitated Phases And Homogenizing Temperature With Different Cooling Methods, U Phongsophitanan, M Polboon, N Chumchery
Study Conditions Of Aluminum Billets For Relationship Between Precipitated Phases And Homogenizing Temperature With Different Cooling Methods, U Phongsophitanan, M Polboon, N Chumchery
Journal of Metals, Materials and Minerals
In producing cast aluminum billets for using in extruded profile production, homogenization is one of the significant steps of the process. This project examined a suitable homogenizing temperature for usage in manufacturing besides common condition. Computerized fluid dynamics and image analysis solution were techniques to identify the relationship between the area fraction of precipitated phases and homogenizing temperature with different cooling methods. Temperature gradient pattern revealed that soaking temperatures at 575C and 565C are suitable conditions to be used in manufacturing. Furthermore, area fraction calculation showed that the area fractions of precipitated phases of each cooling method were not significantly …
Immobilization Of Lipase Onto Cyperus Papyrus L. For Biodiesel Production By Transesterification And Hydrolysis-Esterification, S Charuchinda, P Suthianthong, W Chulalaksananukul
Immobilization Of Lipase Onto Cyperus Papyrus L. For Biodiesel Production By Transesterification And Hydrolysis-Esterification, S Charuchinda, P Suthianthong, W Chulalaksananukul
Journal of Metals, Materials and Minerals
Lipase of Candida rugosa was immobilized on biomass support, plant fiber from Cyperus papyrus L., for biodiesel synthesis. The two immobilization techniques investigated in this study were physical adsorption and covalent binding with 1-Ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC). Results showed that the prepared immobilized lipase by physical adsorption with adding heptane presented higher protein loading, lipase activity and degree of immobilization than that by physical adsorption in phosphate buffer solution and by covalent binding. This immobilized lipase was further applied as biocatalyst for biodiesel synthesis by transesterification and hydrolysis-esterification. The results showed that this immobilized lipase preferred to hydrolyze triglyceride in palm oil …
บทบรรณาธิการ, ประมวล สุธีจารุวัฒน
บทบรรณาธิการ, ประมวล สุธีจารุวัฒน
Journal of Transportation and Logistics (TRANSLOG)
No abstract provided.
อนาคตรถไฟจะไปอย่างไร, นคร จันทศร
อนาคตรถไฟจะไปอย่างไร, นคร จันทศร
Journal of Transportation and Logistics (TRANSLOG)
No abstract provided.
บทสัมภาษณ์ (ตอนที่ 1) ถอดความจากรายการวิทยุ "จุฬาวิจัย" ออกอากาศทางสถานีวิทยุแห่งจุฬาลงกรณ์มหาวิทยาลัย Cu Radio Fm 101.5 Mhz ประจำวันเสาร์ที่ 15 สิงหาคม 2552 ออกอากาศระหว่างเวลา 9.30-9.55 น., ยศพร พยุงสุวรรณ
Journal of Transportation and Logistics (TRANSLOG)
No abstract provided.
แนวทางการพัฒนาอุตสาหกรรมรถไฟฟ้าขนส่งมวลชนและอุตสาหกรรมเกี่ยวเนื่องในประเทศไทย, ประมวล สุธีจารุวัฒน, สมพงษ์ ศิริโสภณศิลป์, ธารทัศน์ โมกขมรรคกุล, สุภารัตน์ ตันทนงศักดิ์กุล, วันชัย มีชาติ, วิษารัช สัญญาลักษณ์ฤาชัย
แนวทางการพัฒนาอุตสาหกรรมรถไฟฟ้าขนส่งมวลชนและอุตสาหกรรมเกี่ยวเนื่องในประเทศไทย, ประมวล สุธีจารุวัฒน, สมพงษ์ ศิริโสภณศิลป์, ธารทัศน์ โมกขมรรคกุล, สุภารัตน์ ตันทนงศักดิ์กุล, วันชัย มีชาติ, วิษารัช สัญญาลักษณ์ฤาชัย
Journal of Transportation and Logistics (TRANSLOG)
No abstract provided.
การศึกษาความต้องการและแนวทางการพัฒนากำลังคนด้านปฏิบัติการระบบขนส่งทางราง, ประมวล สุธีจารุวัฒน, นักสิทธ์ นุ่มวงษ์, วันชัย มีชาติ, ชญานุช จาตุรจินดา, วิษารัช สัญญาลักษณ์ฤาชัย
การศึกษาความต้องการและแนวทางการพัฒนากำลังคนด้านปฏิบัติการระบบขนส่งทางราง, ประมวล สุธีจารุวัฒน, นักสิทธ์ นุ่มวงษ์, วันชัย มีชาติ, ชญานุช จาตุรจินดา, วิษารัช สัญญาลักษณ์ฤาชัย
Journal of Transportation and Logistics (TRANSLOG)
No abstract provided.
ระบบและส่วนประกอบเบื้องต้นของรถไฟฟ้าขนส่งมวลชน, นัทสิทธิ์ นุ่มวงษ์
ระบบและส่วนประกอบเบื้องต้นของรถไฟฟ้าขนส่งมวลชน, นัทสิทธิ์ นุ่มวงษ์
Journal of Transportation and Logistics (TRANSLOG)
No abstract provided.
บทวิเคราะห์เปรียบเทียบกรณีศึกษาสถาบันวิจัยเทคโนโลยีระบบรางในต่างประเทศ (กรณีศึกษาประเทศญี่ปุ่นและเกาหลี), รุ่งโรจน์ กมลเดชเดชา
บทวิเคราะห์เปรียบเทียบกรณีศึกษาสถาบันวิจัยเทคโนโลยีระบบรางในต่างประเทศ (กรณีศึกษาประเทศญี่ปุ่นและเกาหลี), รุ่งโรจน์ กมลเดชเดชา
Journal of Transportation and Logistics (TRANSLOG)
No abstract provided.
การพัฒนาระบบรถไฟฟ้าขนส่งมวลชนในประเทศไทย, สมพงษ์ ศิริโสภณศิลป์, วิษารัช สัญญาลักษณ์ฤาชัย, วิรัช หิรัญ
การพัฒนาระบบรถไฟฟ้าขนส่งมวลชนในประเทศไทย, สมพงษ์ ศิริโสภณศิลป์, วิษารัช สัญญาลักษณ์ฤาชัย, วิรัช หิรัญ
Journal of Transportation and Logistics (TRANSLOG)
No abstract provided.
บทสัมภาษณ์ (ตอนที่ 2) ถอดความจากรายการวิทยุ "จุฬาวิจัย" ออกอากาศทางสถานีวิทยุแห่งจุฬาลงกรณ์มหาวิทยาลัย Cu Radio Fm 101.5 Mhz ประจำวันเสาร์ที่ 22 สิงหาคม 2552 ออกอากาศระหว่างเวลา 9.30-9.55 น., ยศพร พยุงสุวรรณ
Journal of Transportation and Logistics (TRANSLOG)
No abstract provided.
Versatile Route For Preparation Of Polydiacetylene/Zno Nanocomposites And Their Colorimetric Response To Ph And Ethanol, N Rungruangviriya, N Traiphol
Versatile Route For Preparation Of Polydiacetylene/Zno Nanocomposites And Their Colorimetric Response To Ph And Ethanol, N Rungruangviriya, N Traiphol
Journal of Metals, Materials and Minerals
This contribution presents a simple method to prepare polydiacetylene(PDA)/ZnO nanocomposites, which can be utilized as active materials in sensing technology. The ZnO nanoparticles, which constitute of Zn-OH2 + , Zn-OH and Zn-O- groups at their surfaces, function as nano-substrates for self-assembling of diacetylene monomers, 10,12-pentacosadiynoic acid (PCDA), in aqueous medium. Photopolymerization of the assemblies yields poly(PCDA)/ZnO nanocomposites with core-shell structure. Strong interactions between the active groups at ZnO surface and carboxylic head groups of poly(PCDA) promote chain ordering and reduce segmental dynamics of poly(PCDA) in the nanocomposites. The existence of strong interfacial interaction drastically affects the colorimetric response behavior of …
Preparation And Properties Of Superhydrophobic Cotton Fabrics, P Kampeerapappun, K Visatchok, D Wangarsa
Preparation And Properties Of Superhydrophobic Cotton Fabrics, P Kampeerapappun, K Visatchok, D Wangarsa
Journal of Metals, Materials and Minerals
In this study, superhydrophobic cotton fabric was prepared by coating maleic-anhydride grafted poly[styrene-b-(ethylene-co-butylene)-b-styrene] (SEBS-g-MA) triblock copolymer solutions containing calcium carbonate (CaCO3) particles. SEBS-g-MA solutions were prepared using single solvent (toluene and tetrahydrofuran (THF)) and mixed solvent (toluene: ethanol (EtOH) and THF: EtOH). Cotton fabrics were treated with the prepared solution using padding technique. All coated fabrics exhibited a water contact angle (WCA) of more than 100°. Optimum WCA values were observed when THF and 90:10 toluene: EtOH were employed. In case of CaCO3 particles addition, 6% W/V CaCO3 could impart the highest WCA value of 154°. However, the durability of …
Corrosion Assessment Of Carbon Steel In Thailand By Atmospheric Corrosion Monitoring (Acm) Sensors, W Pongsaksawad, E Viyanit, S Sorachot, T Shinohara
Corrosion Assessment Of Carbon Steel In Thailand By Atmospheric Corrosion Monitoring (Acm) Sensors, W Pongsaksawad, E Viyanit, S Sorachot, T Shinohara
Journal of Metals, Materials and Minerals
Atmospheric corrosion of metal depends on material compositions, weather condition (dry, dew, and rain period), temperature, relative humidity, and airborne sea salt of specific location. General testing procedure to obtain the corrosion rate is by actual exposure test of the specimen panels based on time interval plan. In Japan, atmospheric corrosion monitoring (ACM) sensor, made of an iron-silver galvanic couple, has been developed and used to sense the corrosivity in terms of galvanic current. Under some atmospheric conditions, these data can be converted to time of wetness and related to the corrosion rate of carbon steel. With ACM sensors, it …
Preparation And Characteristics Of Galangal Essential Oil/Alginate Microcapsules, T Jiamrungraksa, S Charuchinda
Preparation And Characteristics Of Galangal Essential Oil/Alginate Microcapsules, T Jiamrungraksa, S Charuchinda
Journal of Metals, Materials and Minerals
Galangal essential oil/alginate microcapsules were prepared by solidifying in liquid (orifice method) between sodium alginate and calcium chloride. The structure, morphology and also the thermal stability of the microcapsules were investigated by FT-IR, optical microscope, infrared moisture determination balance (IMDB) at 120°C for 2 hours. The galangal essential oil release content of microcapsules was estimated by measuring time course of weight of microcapsules determination by isothermal TGA at 37°C and 120°C. FT-IR spectral data confirmed the presence of galangal essential oil in the prepared microcapsules. An increase of sodium alginate concentration and oil content resulted in significantly higher average size …
Development Of An Aluminum Semi-Solid Extrusion Process, T Rattanochaikul, S Janudom, N Memongkol, J Wannasin
Development Of An Aluminum Semi-Solid Extrusion Process, T Rattanochaikul, S Janudom, N Memongkol, J Wannasin
Journal of Metals, Materials and Minerals
Semi-solid extrusion process is a new forming process that is quite promising because the process requires lower forming pressure than conventional solid extrusion. In addition, semi-solid extrusion does not require large machines, which results in lower production costs. The aim of this article is to study the feasibility of an aluminum semi-solid extrusion process. The semi-solid technique selected for usage in this study was the Gas Induced Semi-Solid (GISS) process. The laboratory extrusion system was developed in this work. In the experiments, nitrogen gas was injected into aluminum melt for about 5 seconds. After that, the obtained semi-solid slurry was …