共搜索到78488条信息,每页显示10条信息,共7849页。用时:0小时0分0秒562毫秒
the partial substitution of Al for Ni. Therefore a decrease in the pulverization of the alloy particles is obtained, which leads to the decrease of the contact area of the fresh alloy surface with alkaline electrolyte and the increase of the charge/discharge efficiency. Moreover, the occurrence of Al in the alloy can create a dense Al oxide film on the surface of the alloy during charge/discharge cycling......
’s sintered density, and enhance the mechanical properties of the alloy. Key words: Ni-Fe-Al alloy; mechanical alloy; powder metallurgy  ...态抗拉强度可达到868 MPa,说明元素粉末中添加的预合金粉可以控制烧结过程,提高合金的烧结密度,同时增强合金的力学性能. 关键词:Ni-Fe-Al合金;机械合金化;粉末冶金 中图分类号:TG 113.25;TF 124 文献标识码:A Influence of prealloyed powder on properties......
......
......
Cell parameters and phases of La0.7Mg0.3Ni2.8Co0.7?xAlx hydrogen storage alloy 晶胞体积的增大主要是由于Al的原子半径大于Ni和Co的原子半径引起的,同时也表明,x值在一定范围内变化时,Al元素可以线性固溶于La2Ni7相中,但随着Al含量的继续增加,La2Ni7相晶胞逐渐膨胀,能量逐渐升高... Charge-discharge cycle curves of hydrogen storage alloy electrodes: (a) La0.7Mg0.3Ni3.5?xAlx; (b) La0.7Mg0.3Ni2.8- Co0.7?xAlx 由此可见,对这两种体系合金,较低的Al替代量可改善合金的最大放电容量和循环性能,而过高的Al含量不利于合金电化学性能的提高.结合合金相结构的分析可以......
, i.e. using nano-Al or Al-based alloy particles (with nanometer structures) as the fuel(s) [8-12]; for the later, fabricating nanocomposite composed of Al and metal-oxide(s) were investigated [13-15... L. Preparation and characterization of energetic Al-Mg mechanical alloy powders [J]. Combustion and Flame, 2002, 128: 259-269. [9] SHOSHIN Y L, TRUNOV M A, ZHU Xiao-ying. Ignition of aluminum-rich Al......
of the elastic properties of short basalt fibre reinforced al alloy metal matrix composites [J]. Journal of Minerals & Materials Characterization & Engineering, 2014, 2(4): 61-70. [12] VANNAN E, VIZHIAN P... and interface structures of basalt particle reinforced 7A04 Al matrix composites (BP/7A04 Al) were analyzed by using OM, TEM, SEM and EDS, and the mechanical properties of 7A04 Al alloy were compared......
> Preparation of SiCp/2024 Al alloy composites by powder mixing and semi-solid extrusion technology Abstract: The powder mixing and semi solid extrusion technology for fabricating..., SiC p/2024 Al alloy composites fabricated possess relatively higher elongation. Keyword: SiC p/2024 Al alloy composites; powder mixing; semi solid extrusion......
treatment of oxidation, acid-washing and acid-washing after oxidation were carried out on SiC particles, then 6066 aluminum alloy reinforced by SiC particles was fabricated by powder metallurgy route... the strength of composites. Key words: 6066aluminum matrix alloy; SiC particles; surface treatment; mechanical properties 近年来,SiC增强Al基复合材料由于具有较高的比强度和比刚度,作为结构材料越来越受重视, 这些性能对质量要求高的部件,如航空,汽车及航海等方面的应用来说尤为重要......
Numerical simulation of tungsten alloy in powder injection molding process ZHENG Zhen-xing(郑振兴)1, XIA Wei(夏 伟)1, ZHOU Zhao-yao(周照耀)1, ZHU Quan-li(朱权利)1 School of Mechanical...; Abstract: The flow behavior of feedstock for the tungsten alloy powder in the mold cavity......