共搜索到86068条信息,每页显示10条信息,共8607页。用时:0小时0分0秒609毫秒
; Abstract: The particle characteristics of 15% SiC particles reinforced metal matrix composites (MMC) made by powder... in detail. 2 Image processing The material examined is aluminum alloy-silicon carbide composites made by a powder metallurgy route. Aluminum powder was blended with 15% (volume fraction) of silicon carbide......
sputtering process for a nominal thickness of about 3μm. The TiN/(Ti, Al)N multilayer coating was prepared via alternately sputtering titanium target and titanium aluminium alloy target.The molar ratios of Al against Ti of titanium aluminium alloy target was 5∶5. 2.2 Measurement of coating properties The molar ratios of Al against Ti in the (Ti, Al)N monolayer was measured with energy dispersive X......
由除杂铝渣碱溶碳分制备高纯Al(OH)3申晓毅,常龙娇,王佳东,翟玉春东北大学材料与冶金学院摘 要:以红土镍矿酸浸液的除杂铝渣为原料,经碱溶,分步碳分制备高纯Al(OH)3粉体,实验考察了除杂铝渣碱溶温度,碱溶pH值与除杂铝渣中铝溶出率的关系及碳分终点pH值,碳分温度与沉铝率之间的关系.实验得到的适宜碱溶条件为pH值14,温度90℃,时间10 min;碳分条件为碳分终点pH值9,碳分温度75℃.采用XRD,SEM,化学成分分析对所得Al(OH)3粉体进行了表征.结果表明Al(OH)3粉体晶型发育良好,颗粒不规则,表面粗糙,结构松散,多孔.关键词:除杂铝渣;碱溶;分步碳分;高纯Al(OH)3粉体;......
on powder metallurgy technology combined with the semi-solid metal forming process. The satellite angle-frames were prepared by this technology with Alp and SiCp materials mixed with different volume... that the microstructures of samples are homogeneous and they have high hardness and certain plasticity. Key words: powder metallurgy; thixoforming in pseudo-semi-solid state; high-melting alloy CLC number: TG376......
of the solid lubricating film on multilayer coating. Thus the multilayer coatings are potential candidates as self-lubricating and wear-resistant coatings for Al alloy parts in engineering applications. Key words: Al alloy; micro-arc oxidation; aluminum oxide; multilayer; friction and wear behavior CLC number: TG174  ......
produced, via a powder metallurgy(PM) route, from batches of high pressure gas atomised 2124 Al alloy powders blended with 17% of abrasive grade SiC particulate had irregular shapes with sharp corners... reinforced metal matrix composites [J]. Mater Sci Eng A, 2001, A297: 44-47. [16]Murato[AKgˇ]lu M, Aksoy M. The effects of temperature on wear behaviours of Al-Cu alloy and Al-Cu/ SiC composite [J......
......
of β-Al3Ni5 and Al3Ni do not form in the nanometer powders. Key words: Ni-Al alloy; nanometer powder; alloy phase; PVD; gas evaporation 纳米粒子具有显著的体积效应, 表面效应, 量子尺寸效应等[1, 2], 因而表现出一些反常的现象, 如在金属...; 文献标识码: A Phase formation regularities of Ni-Al alloy nano powders prepared by vapor deposition GAO Wei-li, YAN Hong......
behavior and expansion mechanism of Cu-Ni-Al powder alloy FENG Ying, LI Yi-min, HE Hao, ZENG Zhao-yi (State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China) Abstract: Cu-10Ni-1.25Al alloy was prepared by compression molding with Cu, Ni and Al powder. The sintering behavior and expansion mechanism of Cu-Ni-Al system powder alloy were investigated......
含量略高于1号和2号铸锭的Al含量,这是由两方面的原因造成的:1) 3号铸锭实验原料配比中单质铝的比例(Al-V合金中Al质量分数为46%)低于另外两个实验;2) 3号铸锭熔炼过程中精炼区及凝固区电子束电流相应有所降低. 表3 TC4铸锭化学成分对比 Table 3 Chemical composition comparison of TC4 alloy ingot 图... Jun, HAN Ming-cheng, YANG Jian-chao, NI Pei-tong, ZHAO Yong-qing. Calculation of Al evaporation loss of TC4 alloy during electron beam cold hearth remelting process[J]. Rare Metal Materials......