摘要
研究了甩带速度对40Ti-40V-10Cr-10Mn合金微观结构和储氢特性的影响。物相分析表明,未经甩带的样品仅由体心立方结构的V基固溶体(BCC相)组成;10 m/s和30 m/s甩带样由BCC相、C14型Laves相组成;20m/s甩带样则由BCC相、C15型Laves相组成。动力学机制研究表明,未甩带样及10m/s和30m/s甩带样的吸氢过程均受化学反应控制,而20m/s甩带样的吸氢过程则受到三维扩散控制。随着甩带速度的提高,样品在室温下的吸氢量先减小后增加,其中20m/s甩带样的最小;甩带样在室温下的放氢量均大于未甩带样,且10m/s甩带样在室温下的放氢量最大,吸放氢迟滞效应也得到改善;随着甩带速度的增加,样品在373K下的放氢量先减小后增加,其中20m/s甩带样的最小,而10m/s甩带样的放氢量接近于未甩带样。
The effects were investigated of melt-spinning velocity on microstructure and hydrogen storage properties of 40Ti-40V-10Cr-10 Mn.The phase analysis shows that the original sample consists of V-based solid solution with body centered structure（BCC phase）.The melt-spun samples at 10 m/s and 30 m/s consist of BCC phase and C14-Laves phase.The melt-spun sample at 20m/s consists of BCC phase and C15-Laves phase.Kinetic mechanism research shows that hydrogen absorption kinetic process can be described by chemical reaction mechanism for the original sample and melt-spun samples at 10m/s and 30m/s and described by 3-D diffusion mechanism for the melt-spun sample at 20m/s.Moreover,with the increase of melt-spinning velocity,hydrogen absorption capacity of the sample at room temperature decreases at first and then increases,getting the minimum at 20 m/s.All the melt-spun samples have higher hydrogen desorption capacity at room temperature than the original sample,and the melt-spun sample at 10 m/s has the maximum with improved hydrogen absorption and desorption hysteresis.With melt-spinning velocity increasing,hydrogen desorption capacity of the sample at 373 Kfirstly decreases and then increases,getting the minimum at 20m/s,and the melt-spun sample at 10m/s and the original sample have the close value.
出处
《稀有金属与硬质合金》
CAS
CSCD
北大核心
2016年第2期35-40,共6页
Rare Metals and Cemented Carbides
基金
江苏省科技支撑计划--工业部分(BE2012047)
