过计量比Zr-Ti-V合金的组织与吸氢性能  

Microstructure and hydrogen absorption properties of over-stoichiometric Zr-Ti-V alloys

作　　者：陈思文 李若琳 江艳 张云龙 CHEN Siwen;LI Ruoin;JIANG Yan;ZHANG Yunong(School of Materials Engineering,Jiangsu University of Technology,Changzhou 213001,China)

机构地区：[1]江苏理工学院材料工程学院,江苏常州213001

出　　处：《有色金属材料与工程》2024年第5期63-69,共7页Nonferrous Metal Materials and Engineering

基　　金：2022江苏省高等学校大学生创新训练项目;江苏省中以产业技术研究院开放课题(JSIITRI202108)。

摘　　要：采用真空电弧熔炼制备ZrTi_(0.2)V_(x)(x=2.8,3.3)合金,随后进行均匀化退火处理。研究过计量比对合金的相组成、显微组织、吸氢性能及氢化产物的影响,并分析其影响机制。结果表明:均匀化退火处理可增加Laves相、减少V-BCC相、消除α-Zr相。V-BCC相含量随计量比的增大而增加。两种合金均能快速吸氢,在几十秒内达到基本饱和,吸氢速率差异不大。ZrTi_(0.2)V_(3.3)合金的压力-成分-温度(pressure-composition-temperature,PCT)曲线更加倾斜,吸氢量更低。ZrV_(2)H_(4.5)和VH_(0.81)是饱和吸氢后的主要氢化物。Laves相氢化物占比更高是ZrTi_(0.2)V_(2.8)合金具有更高吸氢性能的主要原因。ZrTi_(0.2)V_(x)(x=2.8,3.3)alloys were prepared by vacuum arc melting followed by homogenization.The effects of over-stoichiometry on phase constitution,microstructures,hydrogen absorption properties and hydrogenated products were studied,and the influence mechanism was analyzed.The results show that the homogenization increases Laves phase,reduces V-BCC phase and eliminatesα-Zr phase.The content of V-BCC phase increases with the increase of stoichiometry.Both the two alloys can absorb hydrogen quickly,and reach saturation in a few tens of seconds with little difference in the hydrogen absorption rate.The pressure-composition-temperature(PCT)curves of ZrTi_(0.2)V_(3.3) alloy are more inclined,and the hydrogen absorption capacity is lower.ZrV_(2)H_(4.5) and VH_(0.81) are the main hydrides after saturated hydrogen absorption.The higher ratio of Laves-hydride is the main reason for the higher hydrogen absorption properties of ZrTi_(0.2)V_(2.8) alloy.

关 键 词：计量比 显微组织 LAVES相 吸氢性能 

分 类 号：TG135[一般工业技术—材料科学与工程]