氮、氧杂质对V_(40)Ti_(26)Cr_(26)Fe_(8)合金化学成分、微观组织和贮氢性能的影响  

Effect of Nitrogen and Oxygen Impurities on Chemical Composition,Microstructure,and Hydrogen Storage Performance of V_(40)Ti_(26)Cr_(26)Fe_(8) Alloy

作　　者：朱鹏飞 王倩 吴朝玲[1,3] 陈云贵 严义刚 王尧 Zhu Pengfei;Wang Qian;Wu Chaoling;Chen Yungui;Yan Yigang;Wang Yao(College of Materials Science and Engineering,Sichuan University,Chengdu 610064,China;Institute of New-Energy and Low-Carbon Technology,Sichuan University,Chengdu 610065,China;Engineering Research Center of Alternative Energy Materials&Devices,Ministry of Education,Chengdu 610064,China)

机构地区：[1]四川大学材料科学与工程学院,四川成都610064 [2]四川大学新能源与低碳技术研究院,四川成都610065 [3]后续能源材料与器件教育部工程研究中心,四川成都610064

出　　处：《稀有金属材料与工程》2022年第5期1582-1588,共7页Rare Metal Materials and Engineering

基　　金：International/Hongkong,Macao&Taiwan Scientific and Technological Innovation Cooperation Project(2019YFH0148)。

摘　　要：采用X射线衍射、扫描电子显微镜、光学显微镜和压力-成分-温度(PCT)等手段研究了氮、氧杂质对V-Ti-Cr-Fe合金微区化学成分、微观结构和贮氢能力的协同影响。V_(40)Ti_(26)Cr_(26)Fe_(8)合金的贮氢能力随着氮、氧杂质含量的增加而明显降低,主要作用机理如下:氧在V基合金中的溶解抑制了二氢化物相的形成,导致氢容量的降低(主要效应),而氮与钛结合形成了新的富氮钛相,导致了主相成分的变化和晶格参数的减小(二次效应)。The synergetic effects of nitrogen and oxygen impurities on the micro-area chemical composition,microstructure,and hydrogen storage performance of V-Ti-Cr-Fe alloys were investigated through X-ray diffraction,scanning electron microscopy,optical microscopy,and pressure-composition-temperature(PCT)analyses.Results show that the hydrogen storage capacity of V_(40)Ti_(26)Cr_(26)Fe_(8)alloy is obviously decreased with increasing the nitrogen and oxygen impurities.The mechanism for the decrease is as follows:the oxygen dissolved in V-based alloys suppresses the formation of the dihydride phase,resulting in the decrease in hydrogen capacity(primary effect);while the nitrogen is bound with titanium forming a new nitrogen-titanium-enriched phase,which results in composition change of the main phase and decreases the lattice parameter(secondary effect).

关 键 词：V-Ti-Cr-Fe合金 贮氢性能 氮氧杂质 晶格常数 

分 类 号：TG113[金属学及工艺—物理冶金]