Materials Literature
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In this paper, the effect of load, Velocity of sliding and sliding distance on friction and wear of materials made of Polytetrafluoroethylele (PTFE) and PTFE composites under wet condition with filler materials such as 25% bronze, 25% glass fiber and 25 % carbon have studied. The experimental work has performed on pin…
Tekstil mamulleri kullanm mrleri iinde defalarca kez ykanmak zorundadrlar. Ykama ilemi esnasnda tekstil mamulleri zarar grebilmektedir. Bu almada ykama parametrelerinin kumalarn boncuklanma zelliine etkileri incelenmitir. Ykama parametreleri olarak ykama sresi, ykama scakl ve ykama tekrar alnmtr
The dehulled seeds of three varieties of Lagenaria siceraria were subjected to control fermentation process. The fermented and unfermented seeds were analysed for their nutritional and anti-nutritional compositions using AOAC 1998. The fermented seeds were found to contain high amount of crude protein (48.12%) and cru…
SUMMARY Cardiac diseases of ischemic origin are threatening clinical conditions characterized by enlarged dysfunctional hearts and the risk of sudden death, with myocardial infarction being the most common disease. The only definitive treatment at present is a cardiac transplant, but new therapeutic approaches, such a…
摘要： 为解决报废汽车的破碎及回收处理问题,由标准拉伸试验获得随机抽取报废汽车轻薄型回收金属材料的力学性能参数，将材料的本构关系简化为双线性模型；利用自制试验装置进行报废汽车轻薄型回收金属摆锤式破碎试验。通过试验过程分析，将破碎过程划分为初始、中间、终了三个阶段；在三个阶段中，轻薄型金属材料发生了局部凹陷、整体弯曲和局部折弯变形，在凹陷变形处失稳、扩展、贯穿的裂纹不断扩展，直至大块的轻薄型回收金属被从其母体上撕裂下来。能量分析表明：整个破碎工具的能量主要被回收金属的弹塑性变形和破碎所消耗；通过简化模型，计算得到三部分弯曲变形的弹塑性弯曲功和回收金属破碎功。结果表明报废汽车回收金属破碎过程中，破碎工具的能量仅有部分用于回收金属破碎。
于2010年1、3、5、7、9、11月6次对紧水滩水库采样调查,并对浮游植物种类鉴定与数量统计,分析了浮游植物的优势种、多样性和群落结构季节变化特征。其结果为:共鉴定浮游植物284种,隶属7门105属。绿藻门最多,共51属139种,其次是硅藻门19属67种,蓝藻门22属52种,金藻门4属9种,甲藻门5属8种,裸藻门2属5种,隐藻门2属4种。浮游植物细胞丰度在1.04×105-3.70×106 个/L之间,平均丰度9.63×105 个/L。多样性指数H'值为1.76-4.64,平均值3.09,丰富度指数D为0.48-2.80,平均值1.62,均匀度指数J为0.51-1.26,平均值0.91。根据TSI(Σ)并结合浮游植物群落结构对水…
Electrical resistivity measurements in the temperature range from 6 to 300 K were carried out in order to investigate the effects of the hydrogen absorption on the transport properties of Ni36Nb24Zr40 amorphous alloy ribbon. The electrical resistivity basically behaved negative temperature dependence in all prepared s…
A vacuum infusion process monitoring methodology incorporating thermocouples and simulation of the vacuum infusion process were studied for an unsaturated polyester resin system.
The corrosion inhibition efficiency of octane sulphonic acid as its sodium salt C8H17SO3Na (SOS) in combination with a bivalent cation like Zinc ion(Zn 2+ ) in controlling corrosion of carbon steel immersed in dam water have been evaluated by weight loss method. A significant decrease in the corrosion rate was observe…
We developed a new hybrid photocatalyst for CO2 reduction, which is composed of a semiconductor and a metal complex. In the hybrid photocatalyst, ΔG between the position of conduction band minimum (ECBM) of the semiconductor and the CO2 reduction potential of the complex is an essential factor for realizing fast elect…
To achieve ultra hydrophobic Poly (ethylene terephthalate), PET substrate, two liquid etching methods of alkaline hydrolysis and aminolysis were applied to influence surface topography. To create low surface energy a layer of fluorocarbon was coated on the surface. The preferences of two methods were investigated by S…
Intensity upgrade of uranium beams is one of the main concerns at the RIKEN Radioactive Isotope Beam Factory (RIBF). The lifetime problem of carbon-foil strippers due to the high energy loss of uranium beams around 10 MeV/u was a principal bottleneck for the intensity upgrade in the acceleration scheme at the RIBF. We…
The influence of rapid post-deposition thermal annealing (500 °C for 2 minutes) on the CIGS thin films of different thicknesses (0.4 to 1.0 m) has been investigated. The deposition of CIGS is carried out using the flash evaporation at the substrate temperature of 250 °C. The as-grown and annealed CIGS is characterize…
Ag wire and Ag alloy wire reliability experiments were conducted on both 28-lead SOP and 96-pin PBGA packages. Biased HAST (b-HAST) of Ag-wired packages with higher ion content molding compouds generated obvious defects promoted by ion accumulation mechanism. Intermetallic compounds (IMCs) at the corroded interface ar…
In this work, boehmite sol was prepared by a previously applied and validated method; hydrolysis of aluminum chloride hexa-hydrate. In order to obtain precise results, the effect of pH after adding precipitating agent, aging time, peptizing temperature and ultrasonic vibration time on the crystallite size of final pre…
According to the literature, it is possible to r eplace synthetic dyes with more echo-friendly natural dyes. One of the popular natural dyes in Iran is madder. This paper reports the effect of age and type of madder in natural dyeing process for better color behavior prediction. Effects of 4 different types of madder…
In the last two decades DLR spent a lot of effort in the development of ceramic rocket thrust chambers.A first system evaluation in the nineties led directly to the operative range of transpiration cooled inner combustion chamber liners because of the natural inherent micro-porosity of Ceramic Matrix Composites (CMCs)…
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In this article,our recent progress concerning the effects of atomic substitution,magnetic field,and temperature on the magnetic and magnetocaloric properties of the LaFe13-xAlx compounds are reviewed.With an increase of the aluminum content,the compounds exhibit successively an antiferromagnetic(AFM) state,a ferromag…
New 100 K TlSr 2