摘要
研究了U-Cu金属间化合物的制备与性能。利用纳米压痕、SEM、能谱仪等表征了化合物的形貌、成分和力学性质,如弹性模量、硬度等。结果显示在一定压力和温度作用下,在金属U和Cu界面获得了一定厚度的金属间化合物。扩散层成分为Cu和U,Cu/U比例约为78:22。对界面化合物进行了微区纳米压痕测试,结果显示U-Cu化合物弹性模量为121 GPa,压入硬度为5.2 GPa,热膨胀系数为7.3×10^(-5)K^(-1)。U-Cu化合物的应变硬化效应比金属U明显。金属U应变率效应比U-Cu化合物明显。
Preparation and characterization of U-Cu intermetallic compound was investigated. The microstructure,phase transformation and mechanical properties such as elastic modulus and hardness of the compounds have been studied by nanoindentation,XRD,SEM and EDX. The microstructure of the compounds displays a new phase with more than 10 μm in thickness,which has a U/Cu ratio 1：4. The nanoindentation tests on sample indicate that hardness of uranium intermetallic compounds is higher than that of metal U and Cu. Uranium intermetallic compounds have a Young＇s modulus of 121 GPa,and a thermal expansion coefficient of 7.3×10^-5 K^-1. The strain hardening effect of U-Cu compound is more obvious than that of U,while the strain rate effect of U is more distinct than that of U-Cu compound.
作者
李瑞文
莫川
廖益传
Li Ruiwen Mo Chuan Liao Yichuan(China Academy of Engineering Physics, Mianyang 621907, China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2017年第9期2714-2719,共6页
Rare Metal Materials and Engineering
基金
中物院发展基金资助(2015B0301046)
国家重大科学仪器设备开发专项"短波长X射线体应力无损分析仪开发及应用"(2012YQ130234)资助
关键词
铀
金属间化合物
纳米压痕
uranium
intermetallic compounds
nanoindentation
