郭熠佳,曹兴忠,李奕鹏,叶超,冉广,黄金池,周哲辉

• 1:厦门大学能源学院
• 2:福建省核能工程技术研究中心
• 3:中国科学院高能物理研究所

摘要(Abstract)：

采用400 keV的H~+在400℃对纯Mo和含0.25%质量分数La的Mo合金(Mo-0.25La)进行了辐照;采用慢正电子湮灭技术和纳米压痕技术对辐照前后的样品分别进行了辐照缺陷分析和纳米压痕硬度与弹性模量测试。结果表明:Mo-0.25La合金块体的抗H~+辐照性能优于纯Mo,La元素抑制了辐照缺陷的产生、降低了辐照硬化值,即提高了抗辐照硬化能力。H~+辐照导致样品的辐照缺陷浓度增加,S参数随辐照剂量的增加而增加,W参数则相反。在相同辐照损伤量下,Mo-0.25La合金的S参数小于纯Mo的相应值。H~+辐照导致纯Mo和Mo-0.25La合金块体与管材的压痕硬度均增加、弹性模量均降低;但是在相同辐照损伤量下,Mo-0.25La合金块体的硬度值增加量最小。3种材料的H_(Irr)/H_(Unirr)值随辐照深度的增加而显著降低,硬度增加量与辐照损伤量呈幂函数关系。

关键词(KeyWords)： 钼镧合金;离子辐照;燃料包壳;慢正电子湮灭;辐照硬化

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(U1967211,11975191和U1832112)

作者(Author): 郭熠佳,曹兴忠,李奕鹏,叶超,冉广,黄金池,周哲辉

DOI: 10.13289/j.issn.1009-6264.2020-0229

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