摘要
CuCrZr合金作为一种性能优异的高强高导合金,是强流氘氚中子源中子靶散热基底材料的最佳选择之一。中子靶的制备需要经过长时间的高温处理,工作时需要承受高能束流轰击产生很高的热载荷,对靶基底的散热性能和力学性能提出了很高的要求。本文研究了预时效对提高CuCrZr合金高温环境下组织和性能稳定性的作用及机制。结果表明,经过预时效处理,CuCrZr合金中析出了细小、弥散的富Cr相和Cu-Zr金属间化合物,提高材料热导率的同时有效抑制了第二相的长大,从而保证了CuCrZr合金具有良好的导热性能及高温力学性能,进而为中子靶散热基底的性能及寿命提供了保障。
CuCrZr alloy is a high strength and high conductivity alloy with excellent properties,which is one of the best choices for neutron target cooling base materials.The neutron target of neutron source needs to be subjected to high-energy beam bombardment,which produces a high thermal load on the target surface,and the preparation of neutron target usually requires a long time of high temperature treatment which puts forward a high requirement on the heat dissipation and mechanical properties of the target base.This paper intends to analyze the effect and mechanism of pre-aging on improving the microstructure and property stability of CuCrZr alloy under high temperature service environment.The results show that after the pre-aging treatment,fine and dispersed Cr-rich phase and Cu-Zr are separated out from the CuCrZr alloy,which improves the thermal conductivity of the material and effectively inhibits the abnormal growth of the second phase and avoids the formation of the coarse second phase,thus ensuring the CuCrZr alloy has good mechanical properties and thermal conductivity at high temperature.
作者
李晨
黄波
信敬平
杨琪
宋勇
周涛
凤麟核团队
Li Chen;Huang Bo;Xin Jingping;Yang Qi;Song Yong;Zhou Tao;FDS Consortium(Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China;University of Science and Technology of China,Hefei 230026,China;Institute of Neutron Science(Chongqing)Co.,Ltd.,Chongqing 401331,China;International Academy of Neutron Science,Qingdao 266199,China)
出处
《核安全》
2023年第5期95-101,共7页
Nuclear Safety
基金
国家重点研发计划(项目编号:2020YFB1901901)
中国科学院A类战略性先导科技专项(项目编号:XDA22010504)
重庆市杰出青年科学基金(项目编号:CSTB2023NSCQ-JQX0010)。
关键词
中子靶
CUCRZR合金
预时效
导热性能
力学性能
Neutron target
CuCrZr alloy
Microstructure
Thermal conductivity
Mechanical property
