储氚合金ZrCo(0.8)M(0.2)(M=Co,Cu,Cr,Mn,Al)的性能研究  

Study of the Properties of ZrCo0.8M0.2(M=Co,Cu,Cr,Mn,Al)Alloys for Tritium Storage

作　　者：吕丽君[1] 程宏辉 钱渊[1] 杨果[1,3] 李晓林 吴胜伟[1] 韩兴博[1] 刘卫[1] Lv Lijun;Cheng Honghui;Qian Yuan;Yang Guo;Li Xiaolin;Wu Shengwei;Han Xingbo;Liu Wei(Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China;Yangzhou University,Yangzhou 225127,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院上海应用物理研究所,上海201800 [2]扬州大学,江苏扬州225127 [3]中国科学院大学,北京100049

出　　处：《稀有金属材料与工程》2020年第8期2658-2664,共7页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(11705266,11575104);Natural Science Foundation of Shanghai(16ZR1443500)。

摘　　要：采用电弧熔炼的方法在氩气气氛中熔炼了ZrCo(0.8)M(0.2)(M=Co,Cu,Cr,Mn,Al)合金。合金的主相均为ZrCo相,但Cr、Mn和Al部分替代Co后形成了第二相。Cr替代形成了Zr2Co和ZrCr2相,Mn替代形成了Zr2Co和ZrMn2相,Al替代形成Zr3Co和Zr6CoAl2相。Cr和Mn的替代使合金的晶胞体积减小,而Cu和Al的替代使晶胞体积增大。Cu、Cr、Mn和Al替代后,ZrCo(0.8)M(0.2)合金的平台压变化不明显,但吸氢量出现了不同程度的降低。Cr和Mn元素的替代明显改善了ZrCo合金在室温下的活化性能。Cr和Mn元素的替代降低了高温下ZrCo合金发生歧化反应的速率,这主要是由于Cr和Mn元素的掺杂减少了氢原子占据不稳定位置8f2和8e的数量,从而降低了歧化反应发生的驱动力。ZrCo0.8M0.2(M=Co,Cu,Cr,Mn,Al)alloys were prepared via the arc melting method in an argon atmosphere.The major phase of the alloys is ZrCo structure.The partial addition of Cr,Mn,and Al leads to the formation of a secondary phase.The Zr2Co and ZrCr2 phases,the Zr2Co and ZrMn2 phases,and the Zr3Co and Zr6CoAl2 phases are formed upon Cr,Mn,and Al substitution,respectively.The cell volume of the alloys decreases upon the Cr and Mn substitution,but increases upon the Cu and Al replacement.Moreover,the hydrogen storage capacity of the alloys decreases when Cu,Cr,Mn,or Al are present in the alloy.However,the plateau of the desorption pressure remains nearly unchanged for all the alloys.The ZrCo alloy activation performance drastically improves upon Cr and Mn addition at room temperature.The disproportionation reaction rate of ZrCo0.8M0.2 alloy decreases,due to the decrease in its driving force.A modification of the 8f2 and 8e sites results in a change in the disproportionation driving force in all the investigated alloys.

关 键 词：ZrCo合金 相结构 储氢性能 歧化反应 

分 类 号：TG139[一般工业技术—材料科学与工程]