Ni^(10+)离子辐照Ni-Mo-Cr合金微观结构演变和硬化的研究  

Microstructural Evolution and Hardening of Ni-Mo-Cr Alloy After Ni^(10+) Ion Irradiation

作　　者：黄鹤飞[1] 李健健[1] 雷冠虹 刘仁多[1] 李德辉[1] 黄庆[1] 闫隆[1] 

机构地区：[1]中国科学院上海应用物理研究所堆材料与工程技术部,上海201800

出　　处：《材料导报》2014年第4期1-3,6,共4页Materials Reports

基　　金：国家重点基础研究发展计划项目(2010CB832903)

摘　　要：室温下对钍基熔盐堆(TMSR)中候选合金结构材料Ni-Mo-Cr合金进行了能量为132MeV的Ni 10+离子辐照研究,辐照剂量分别为1dpa、3dpa和9dpa。X射线衍射仪(XRD)分析显示离子辐照后Ni-Mo-Cr合金发生晶格畸变,维氏显微硬度的测量结果表明高剂量的离子辐照造成Ni-Mo-Cr合金的硬化,这主要归因于辐照导致材料内部形成大量缺陷。当辐照剂量为9dpa时,维氏硬度测试结果表明损伤的峰值出现的深度介于8.1~12.3μm之间,此结果与理论计算相吻合。Ni-Mo-Cr alloy, as a candidate structural material for thorium-based molten salt reactor（TMSR）, was irradiated at 1 dpa, 3 dpa and 9 dpa respectively by 132 MeV Ni^10＋ ions in order to research its radiation resistant property. The results of XRD analyses and micro-indentation tester show the lattice distortion and hardening of Ni- Mo-Cr alloy after ion irradiation, which was believed due to the formation of massive defects in materials induced by irradiation. Moreover, in the case of 9 dpa, the micro-indentation results reveal the peak of ionirradiation damage oc- cur at a depth ranging from 8. 1 to 12. 3 ~m, which is consistent with the theoretical results calculated with TRIM.

关 键 词：Ni-Mo-Cr合金 Ni离子辐照 晶格畸变 硬化 

分 类 号：TL341[核科学技术—核技术及应用]