Indian Journal of Materials Science最新文献_第4页

Effect of Crystallinity of β- and βbc-Nickel Hydroxide Samples on Chemical Cycling β-和βbc-氢氧化镍结晶度对化学循环的影响

Indian Journal of Materials Science Pub Date : 2015-07-27 DOI: 10.1155/2015/820193

R. Narayan

{"title":"Effect of Crystallinity of β- and βbc-Nickel Hydroxide Samples on Chemical Cycling","authors":"R. Narayan","doi":"10.1155/2015/820193","DOIUrl":"https://doi.org/10.1155/2015/820193","url":null,"abstract":"β-phases of nickel hydroxide and cobalt hydroxide samples crystallize in cadmium iodide type structure. β-cobalt hydroxide on oxidation generates β-CoOOH which crystallized in 3R1 polytype while the structure of β-phase of NiOOH polytype is less well understood. β- and -phases of nickel hydroxide samples were prepared by using ammonium hydroxide and sodium hydroxide as precipitating agents. Powder X-ray diffraction data shows that β-phase of nickel hydroxide is perfectly crystalline in nature while -phase of nickel hydroxide is poorly ordered. β- and -phases of nickel hydroxide samples were subjected to chemical oxidation using sodium hypochlorite. The oxidized phases of β- and -phases of nickel oxyhydroxide are highly disordered and the broadening of reflections in the powder X-ray diffraction patterns is due to the presence of structural disorder, variations in the crystallite size, and strain. On reduction of β- and -phases of nickel oxyhydroxide, the powder X-ray diffraction patterns visually match the powder X-ray diffraction data of the pristine phases of β- and -phases of nickel hydroxide indicating that the β-phase of nickel hydroxide does not transform to -phase of nickel hydroxide, but the particle sizes are significantly affected.","PeriodicalId":13278,"journal":{"name":"Indian Journal of Materials Science","volume":"313 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2015-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85721949","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

Improvement in Tribological Performance of Ni-P-TiO2 Composite Coatings Using Taguchi Technique with Grey Relational Analysis 基于灰色关联分析的田口技术改善Ni-P-TiO2复合涂层摩擦学性能

Indian Journal of Materials Science Pub Date : 2015-07-26 DOI: 10.1155/2015/104187

Prasanna Gadhari, P. Sahoo

引用次数: 5

Synthesis, Crystallization, and Dielectric Behaviour of Lead Bismuth Titanate Borosilicate Glasses with Addition of 1% La2O3 添加1% La2O3的钛酸铋铅硼硅酸盐玻璃的合成、结晶和介电性能

Indian Journal of Materials Science Pub Date : 2015-07-15 DOI: 10.1155/2015/498254

C. Gautam, A. Madheshiya, R. Dwivedi

{"title":"Synthesis, Crystallization, and Dielectric Behaviour of Lead Bismuth Titanate Borosilicate Glasses with Addition of 1% La2O3","authors":"C. Gautam, A. Madheshiya, R. Dwivedi","doi":"10.1155/2015/498254","DOIUrl":"https://doi.org/10.1155/2015/498254","url":null,"abstract":"Lead bismuth titanate borosilicate glasses were prepared in the glass system 65[()·TiO3]-34[2SiO2·B2O3]-1La2O3 () doped with one mole percent of via conventional melt quench method. The amorphous nature of glass samples in this glass system is confirmed by using X-ray diffraction (XRD) study. Differential thermal analysis (DTA) has been employed to determine the glass transition temperature, , as well as crystallization temperature, . DTA measurements were recorded in temperature range from 30 to 1200°C. The prepared glasses were crystallized by regulated controlled heat treatment process on the basis of their DTA results. These samples are carried out for XRD measurements in the 2 range from 20 to 80° to study the crystallization behaviour and phase formation of the glass ceramic samples. The scanning electron microscopy (SEM) of these glass ceramic samples has been carried out to explore the morphology through nucleation and growth of the crystallites in the glassy matrix. The values of dielectric constant as well as dielectric loss were increased with increasing the temperature within the frequency range from 20 Hz to 100 Hz. The addition of 1 mol% of to the lead bismuth titanate glasses enhances the crystallization and acts as donor dopant for this glass system.","PeriodicalId":13278,"journal":{"name":"Indian Journal of Materials Science","volume":"12 1","pages":"1-10"},"PeriodicalIF":0.0,"publicationDate":"2015-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83414155","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

SH-Wave at a Plane Interface between Homogeneous and Inhomogeneous Fibre-Reinforced Elastic Half-Spaces 均匀与非均匀纤维增强弹性半空间平面界面上的sh波

Indian Journal of Materials Science Pub Date : 2015-07-09 DOI: 10.1155/2015/532939

C. Zorammuana, S. S. Singh

引用次数: 9

Simple Rheological Analysis Method of Spinnable-Polymer Flow Properties Using MFI Tester 用MFI测试仪对可纺聚合物流动特性的简单流变分析方法

Indian Journal of Materials Science Pub Date : 2015-07-05 DOI: 10.1155/2015/790107

B. Younes

引用次数: 7

Simple Hydrolysis Synthesis of Uniform Rice-Shaped β-FeOOH Nanocrystals and Their Transformation to α-Fe2O3 Microspheres 水稻形均匀β- fe2o3纳米晶的简单水解合成及其向α-Fe2O3微球的转变

Indian Journal of Materials Science Pub Date : 2015-07-05 DOI: 10.1155/2015/918424

B. Singh, N. Sharma, Rakesh Kumar, Ashwani Kumar

引用次数: 3

Modification of grout properties in prepacked aggregate concrete incorporating palm oil fuel ash 加入棕榈油燃料灰的预填骨料混凝土浆料性能的改性

Indian Journal of Materials Science Pub Date : 2015-06-18 DOI: 10.1155/2015/353617

R. Hodjati, Hossein Aslani, I. Faridmehr, A. Awal, Ziba Kazemi

引用次数: 0

Structural, Optical, Electrical, and Magnetic Properties of PVA:Gd3+ and PVA:Ho3+ Polymer Films PVA:Gd3+和PVA:Ho3+聚合物薄膜的结构、光学、电学和磁性能

Indian Journal of Materials Science Pub Date : 2015-05-27 DOI: 10.1155/2015/927364

M. O. Reddy, B. Chandra Babu

引用次数: 23

Simulation of Ni-Based Super-Alloy and Optimizing of Its Mechanical Properties in a Near-Shaped Turbine Blade Part ni基高温合金在近形涡轮叶片零件中的模拟及力学性能优化

Indian Journal of Materials Science Pub Date : 2015-04-15 DOI: 10.1155/2015/413593

M. Alizadeh

{"title":"Simulation of Ni-Based Super-Alloy and Optimizing of Its Mechanical Properties in a Near-Shaped Turbine Blade Part","authors":"M. Alizadeh","doi":"10.1155/2015/413593","DOIUrl":"https://doi.org/10.1155/2015/413593","url":null,"abstract":"This paper presents simulation of a Ni-based super-alloy during filling of a near-shaped turbine blade part to optimize its mechanical properties. Since geometrical shape of the airfoil is so complicated, a simple near-shaped part was made by plexiglass to water modeling. Condition and parameters of water modeling were obtained from the Procast software simulation. The flow pattern of the transparent systems, recorded by a high speed video camera, was analyzed. Air bubble amounts were quantitatively measured by an image analysis software. Quantified results were used to compare two systems in terms of ability to prevent bubble formation and entrainment. Both water modeling and computer simulating methods indicated that highest turbulences in bottom- and top-poured systems form in first initially pouring times. According to the water modeling results amount of bubble values was 40 and 18 percent for top-poured and bottom-poured systems, respectively. Then the Ni-base super-alloy IN939 is poured by investment casting in bottom- and top-poured systems and compared with each other. The results stated that bottom-poured system had higher mechanical properties compared to top-poured one. Ultimate tensile strength for the former was 820 MPa while for the part which was cast by bottom-poured system it was 850 MPa.","PeriodicalId":13278,"journal":{"name":"Indian Journal of Materials Science","volume":"3 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2015-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83276028","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: 0

Effect of Fiber Treatment and Fiber Loading on Mechanical Properties of Luffa-Resorcinol Composites 纤维处理和纤维负荷对丝瓜-间苯二酚复合材料力学性能的影响

Indian Journal of Materials Science Pub Date : 2015-03-05 DOI: 10.1155/2015/658064

C. Parida, S. K. Dash, S. Das

{"title":"Effect of Fiber Treatment and Fiber Loading on Mechanical Properties of Luffa-Resorcinol Composites","authors":"C. Parida, S. K. Dash, S. Das","doi":"10.1155/2015/658064","DOIUrl":"https://doi.org/10.1155/2015/658064","url":null,"abstract":"Tensile and compressive behaviour of resorcinol-formaldehyde (RF) matrix and its composites reinforced with fibers of Luffa cylindrica (LC) have been studied. LC fibers were subjected to chemical treatments such as alkali activation by NaOH followed by bleaching and acid hydrolysis in order to improve fiber-matrix adhesion. Both treated and untreated LC fibers are modified with calcium phosphate. The presence of hydroxy apatite, a polymorph of calcium phosphate and a major constituent of vertebrate bone and teeth, was confirmed from XRD peak of treated LC fiber. XRD analysis of the treated LC fiber has confirmed the crystalline nature of the chemically treated LC fiber by its crystallinity index. The effects of fiber loading of chemically treated and untreated LC fiber on ultimate stress, yield strength, breaking stress, and modulus of the composites were analyzed. The tensile and compressive modulus of the composites were increased with incorporation of both treated and untreated LC fibers into the RF matrix. The modulus of composites with treated LC fiber was enhanced compared to that of the untreated fiber composites. Furthermore the values of ultimate stress, yield stress, and breaking stress were increased with the incorporation of treated LC fiber in the composites.","PeriodicalId":13278,"journal":{"name":"Indian Journal of Materials Science","volume":"13 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2015-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91197893","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: 35