Indian Journal of Materials Science最新文献_第3页

Influencing Parameters in the Photocatalytic Degradation of Organic Effluent via Nanometal Oxide Catalyst: A Review 纳米金属氧化物光催化降解有机废水的影响因素研究进展

Indian Journal of Materials Science Pub Date : 2015-09-17 DOI: 10.1155/2015/601827

A. Gnanaprakasam, V. Sivakumar, M. Thirumarimurugan

引用次数: 190

Mechanical Characterization and Machinability Behavior of Annealed AISI D6 Cold Working Steel 退火AISI D6冷加工钢的力学特性和可加工性行为

Indian Journal of Materials Science Pub Date : 2015-09-17 DOI: 10.1155/2015/196178

M. K. Nayak, R. Sehgal, R. Sharma

{"title":"Mechanical Characterization and Machinability Behavior of Annealed AISI D6 Cold Working Steel","authors":"M. K. Nayak, R. Sehgal, R. Sharma","doi":"10.1155/2015/196178","DOIUrl":"https://doi.org/10.1155/2015/196178","url":null,"abstract":"Tool steels in metal forming industry are exposed to complex and aggressive conditions due to multiple effects (mechanical, thermal, or tribological loading) and require defined mechanical properties. Also machining of tool steel with poor machinability like AISI D6 to manufacture form tools is an extremely difficult task. This paper investigates the microstructural, mechanical, and machining behavior of AISI D6 steel in annealed and hardened conditions. Various mechanical tests indicated good hardenability, improved surface hardness, and phenomenal improvement in tensile strength but extremely poor resistance to impact in both annealed and hardened condition for this steel. The machining characteristics of AISI D6 steel were evaluated using a 2k unreplicated full factorial design approach and statistical techniques have been used to assess and identify the significant factors, namely, cutting speed, feed, depth of cut, and approach angle, in minimizing surface roughness and main cutting force while machining this steel with a carbide tool. It was found that the depth of cut, feed, and approach angle are the most significant factors affecting the surface roughness and depth of cut and feed affect the main cutting force. Cutting speed has no effect on surface roughness and main cutting force in machining of the steel in annealed condition.","PeriodicalId":13278,"journal":{"name":"Indian Journal of Materials Science","volume":"3 1","pages":"1-12"},"PeriodicalIF":0.0,"publicationDate":"2015-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74203642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Dynamics of Kaolinite-Urea Nanocomposites via Coupled DMSO-Hydroxyaluminum Oligomeric Intermediates 通过偶联dmso -羟基铝低聚中间体制备高岭石-尿素纳米复合材料的动力学研究

Indian Journal of Materials Science Pub Date : 2015-09-13 DOI: 10.1155/2015/920835

Siafu Ibahati Sempeho, H. Kim, E. Mubofu, A. Pogrebnoi, Godlisten N. Shao, A. Hilonga

{"title":"Dynamics of Kaolinite-Urea Nanocomposites via Coupled DMSO-Hydroxyaluminum Oligomeric Intermediates","authors":"Siafu Ibahati Sempeho, H. Kim, E. Mubofu, A. Pogrebnoi, Godlisten N. Shao, A. Hilonga","doi":"10.1155/2015/920835","DOIUrl":"https://doi.org/10.1155/2015/920835","url":null,"abstract":"Kaolinite-urea nanocomposites were prepared via intercalation reactions in an attempt to investigate the dynamic nature of kaolinite morphology for advanced applications in controlled release systems (CRS). Characterization was done using SEM-EDX, XRF, ATR-FTIR, XRD, and DT/DTG; Andreasen pipette sedimentation technique was used to determine the grain size distribution of the raw kaolinite. The X-ray diffraction pattern revealed the existence of an FCC Bravais lattice where the intercalation ratios attained were 51.2%, 32.4%, 7.0%, and 38.4% for hydroxyaluminum oligomeric intercalated kaolinite, substituted urea intercalated kaolinite, calcined DMSO intercalated kaolinite, and hydroxyaluminum reintercalated kaolinite, respectively, along with their respective crystallite sizes of 33.51–31.73 nm, 41.92–39.69 nm, 22.31–21.13 nm, and 41.86–39.63 nm. The outcomes demonstrated that the employed intercalation routes require improvements as the intercalation reactions were in average only ≈32.3%. The observations unveiled that it is possible to manipulate kaolinite structure into various morphologies including dense-tightly packed overlapping euhedral pseudo hexagonal platelets, stacked vermiform morphologies, postulated forms, and unique patterns exhibiting self-assembled curled glomeruli-like morphologies. Such a diversity of kaolinite morphologies expedites its advanced applications in the controlled release systems (CRS) such as drug delivery systems and controlled release fertilizers (CRFs).","PeriodicalId":13278,"journal":{"name":"Indian Journal of Materials Science","volume":"13 1","pages":"1-10"},"PeriodicalIF":0.0,"publicationDate":"2015-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79524686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Evaluation of Chitosan Based Polymeric Matrices for Sustained Stomach Specific Delivery of Propranolol Hydrochloride 壳聚糖基聚合物基质对盐酸心得安胃内缓释的评价

Indian Journal of Materials Science Pub Date : 2015-08-27 DOI: 10.1155/2015/312934

Juhi Dubey, A. Verma, N. Verma

{"title":"Evaluation of Chitosan Based Polymeric Matrices for Sustained Stomach Specific Delivery of Propranolol Hydrochloride","authors":"Juhi Dubey, A. Verma, N. Verma","doi":"10.1155/2015/312934","DOIUrl":"https://doi.org/10.1155/2015/312934","url":null,"abstract":"The objective of the present investigation was to explore the potential of Chitosan based polymeric matrices as carrier for sustained stomach specific delivery of model drug Propranolol Hydrochloride. Briefly, single unit hydrodynamically balanced (HBS) capsule formulations were prepared by encapsulating in hard gelatin capsules, intimately mixed physical mixtures of drug, and cationic low molecular weight Chitosan (LMCH) in combination with either anionic medium viscosity sodium alginate (MSA) or sodium carboxymethylcellulose (CMCNa). The effect of incorporation of nonionic polymers, namely, tamarind seed gum (TSG) and microcrystalline cellulose (MCCP), was also investigated. It was observed that HBS formulations remained buoyant for up to 6 h in 0.1 M HCl, when LMCH : anionic/nonionic polymer ratio was at least 4 : 1. It was also observed that LMCH has formed polyelectrolyte complex (PEC) with MSA (4 : 1.5 ratio) and CMCNa (4 : 1 ratio) in situ during the gelation of HBS formulations in 0.1 M HCl. The retardation in drug release was attributed to the PEC formation between LMCH and MSA/CMCNa. Incorporation of MCCP (rapid gel formation) and TSG (Plug formation) was found to be innovative. From the data, it is suggested that Chitosan based polymeric matrices may constitute an excellent carrier for stomach specific drug delivery.","PeriodicalId":13278,"journal":{"name":"Indian Journal of Materials Science","volume":"44 1","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2015-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72649085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 14

Effect of Fly Ash and Carbon Reinforcement on Dry Sliding Wear Behaviour of Red Mud 粉煤灰和碳增强剂对赤泥干滑动磨损性能的影响

Indian Journal of Materials Science Pub Date : 2015-08-27 DOI: 10.1155/2015/296324

H. Sutar, Debashis Roy, S. Mishra

引用次数: 7

Enhanced Catalytic Activity of Supported Gold Catalysts for Oxidation of Noxious Environmental Pollutant CO 负载型金催化剂对有害环境污染物一氧化碳氧化活性的增强研究

Indian Journal of Materials Science Pub Date : 2015-08-27 DOI: 10.1155/2015/658346

P. Saikia, A. T. Miah, B. Malakar, A. Bordoloi

引用次数: 9

Synthesis and Optical Characterization of Europium Doped MY2O4 (M = Mg, Ca, and Sr) Nanophosphors for Solid State Lightening Applications 铕掺杂MY2O4 (M = Mg, Ca, Sr)纳米荧光粉的合成与光学特性研究

Indian Journal of Materials Science Pub Date : 2015-08-17 DOI: 10.1155/2015/845065

Devender Singh, Vijeta Tanwar, Shri Bhagwan, Vandna Nishal, Suman Sheoran, Sonika Kadyan, A. Samantilleke, P. S. Kadyan

引用次数: 11

Combined Effect of Slip Velocity and Surface Roughness on a Magnetic Squeeze Film for a Sphere in a Spherical Seat 滑移速度和表面粗糙度对球座内球体磁挤压膜的综合影响

Indian Journal of Materials Science Pub Date : 2015-08-11 DOI: 10.1155/2015/159698

G. Deheri, Sejal J. Patel

引用次数: 2

Effects of M2+ (M = Ca, Sr, and Ba) Addition on Crystallization and Microstructure of SiO2-MgO-Al2O3-B2O3-K2O-F Glass M2+ (M = Ca, Sr和Ba)添加对SiO2-MgO-Al2O3-B2O3-K2O-F玻璃结晶和微观结构的影响

Indian Journal of Materials Science Pub Date : 2015-08-05 DOI: 10.1155/2015/638341

Mrinmoy Garai, N. Sasmal, B. Karmakar

{"title":"Effects of M2+ (M = Ca, Sr, and Ba) Addition on Crystallization and Microstructure of SiO2-MgO-Al2O3-B2O3-K2O-F Glass","authors":"Mrinmoy Garai, N. Sasmal, B. Karmakar","doi":"10.1155/2015/638341","DOIUrl":"https://doi.org/10.1155/2015/638341","url":null,"abstract":"In understanding the effect of K+ substitution by M2+ (M = Ca, Sr, and Ba) on crystallization and microstructural properties of boroaluminosilicate glass system, the SiO2-MgO-Al2O3-B2O3-MgF2-K2O-Li2O-AlPO4 glasses were prepared by single-step melt-quenching at 1500°C. Density of base glass (2.64 g·cm−3) is found to be decreased in presence of CaO and SrO. is increased by 5–10°C and decreased by 13–20°C on addition of M2+. The variation of , and decrease of thermal expansion (CTE) from 7.55 to 6.67–6.97 (×10−6/K, at 50–500°C) in substituting K+ by M2+ are attributed to the higher field-strength of Ca2+, Sr2+, and Ba2+. Opaque mica glass-ceramics were derived from the transparent boroaluminosilicate glasses by controlled heat treatment at 1050°C (duration = 4 h); and the predominant crystalline phase was identified as fluorophlogopite (KMg3AlSi3O10F2) by XRD and FTIR study. Glass-ceramic microstructure reveals that the platelike mica flake crystals predominate in presence of K2O and CaO but restructured to smaller droplet like spherical shaped mica on addition of SrO and BaO. Wide range of CTE values (9.54–13.38 × 10−6/K at 50–800°C) are obtained for such glass-ceramics. Having higher CTE value after crystallization, the CaO containing SiO2-MgO-Al2O3-B2O3-MgF2-K2O-Li2O-AlPO4 glass can be useful as SOFC sealing material.","PeriodicalId":13278,"journal":{"name":"Indian Journal of Materials Science","volume":"8 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2015-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86755441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 15

Electronic Structure, Electronic Charge Density, and Optical Properties Analysis of GdX3 (X = In, Sn, Tl, and Pb) Compounds: DFT Calculations GdX3 (X = In, Sn, Tl和Pb)化合物的电子结构，电子电荷密度和光学性质分析:DFT计算

Indian Journal of Materials Science Pub Date : 2015-08-03 DOI: 10.1155/2015/296095

J. A. Abraham, G. Pagare, S. Sanyal

引用次数: 20