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nanowire arrays with controllable length were then made by the partial removal of AAO using a mixture of phosphoric acid and chromic acid (6 wt pct H3PO4: 1.8 wt pct H3CrO4). The images of Ni nanowire......
, Shenyang 110016, China摘 要:The effects of oxygen on the microstructure of Ti-47Al-0.7B (at. pct) alloy for as-cast automotive valves were investigated. Six alloys with oxygen content from 0.4 to 1.4 at. pct were prepared by induction melting and centrifugal casting in CaO crucible under protective atmosphere. The microstructures were observed by optical......
,Circuito Exterior,Cd.Universitaria,Del.Coyoac’an,M’exico,DF.04510,Mexico摘 要:Two ternary Al-2.2Zn-0.95Mg and Al-5.5Zn-2.1Mg(in wt pct) alloys,with Zn:Mg ratios...,and the aged peaks coincided with lattice parameter minima.Significant precipitates formation only occurred for the alloy containing 5.5 wt pct Zn and 2.1 wt pct Mg,provoking an important......
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=0,0.1,0.2,0.3)储氢合金.通过X射线衍射(XRD)和扫描电镜(SEM)研究了合金的相结构和表面形貌,利用等容压差法分析测试了合金的压力--组成--温度(PCT)曲线和吸放氢动力学性能,研究了烧结温度,稀土元素Nd对储氢合金微观组织结构和储氢性能的影响,比较了SPS技术与真空感应熔炼法制备的Mg基合金组织结构和储氢性能的异同.结果表明:SPS制备的Mg2-xNdxNi(x=0~0.3)系列储氢合金具有多相结构,储氢合金的吸放氢动力学性能良好;Nd元素有利于Mg合金化,不利于储氢量;烧结温度对储氢量,PCT曲线平台性能有明显影响;当Mg2-xNdxNi系合金中含有Mg和NdMg12相,PCT曲线出现双平台现象;与铸态合金相比,SPS制备的Mg1.7Nd0.3Ni储氢合金的吸放氢动力学性能较好,但储氢容量,放氢率和PCT曲线平台性能更差.关键词:储氢合金;镁合金;放电等......
of HoCu2 were a mixture of Cu, unknown hydride I, and unknown hydride II. Based on the PCT (pressure-concentration-temperature) curves under different reaction temperatures, the relationships among... process were also calculated from the PCT curves. The magnetization and volumetric specific heat capacity of the hydride were also measured by SQUID magnetometer and PPMS, respectively. 1 Introduction......
退火对快淬法制备的LaNi_(4.25)Al_(0.75)合金组织和储氢性能的影响 吕曼祺1,孙文声1,杨柯1,曹大力2,陈德敏1 (1.U;2.沈阳化工学院材料科学与工程学院,辽宁,沈阳,110142) 摘要:采用熔体旋淬法制备了LaNi_(4.25)Al_(0.75)合金,用XRD,SEM及吸氢PCT曲线(压力-组成等温线)和动力学测试等方法,研究了退火处理对合金结构和储氢性能的影响.XRD测试结果表明,退火后,合金保持CaCu5结构,但晶粒变大.PCT和动力学测试结果表明,经过退火处理的合金与快淬态相比,吸氢量增加,吸氢平台变宽,吸氢速度变快. 关键词:LaNi_(4.25)Al_(0.75)储氢合金; 熔体旋淬; 退火; LaNi_(4.25) Al_(0.75); hydrogen storage alloy; melt-spun; annealing......
" name="ChDivSummary">The TEM and HRTEM were utilized to investigate the phase transformation of hydrogenated Ti-6Al-4V alloys (0 wt pct-0.9 wt pct H) treated by annealing and quenching from β field... in the specimens containing more than 0.6 wt pct hydrogen. The formation of α and twins can be attributed to the internal stress caused by solid solution of hydrogen and hydrides precipitation.关键词:......
/BA/MAA). The optimum addition of LMPA is about 4 wt pct. By adding 3 wt pct nano-SiO2 into poly (MMA/BA/MAA)/LMPA adhesive, its properties such as the shear strength, thermal stability, wear resistance......
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