氦对Fe-Cr-Ni合金和Fe-Cr-Mn合金辐照损伤的影响  

Effects of Helium on Behaviour of Irradiation Damage in Fe-Cr-Ni and Fe-Cr-Mn Alloys

作　　者：胡本芙[1] 余泉茂[1] 高桥平七郎[2] 木下博嗣[2] 

机构地区：[1]北京科技大学材料科学及工程学院,北京100083 [2]北海道大学新能源工学研究中心

出　　处：《核科学与工程》2003年第2期145-151,共7页Nuclear Science and Engineering

摘　　要：利用超高压电镜与高能离子加速器连接装置 ,研究了氦 (He)对Fe Cr Ni和Fe Cr Mn两类奥氏体型合金辐照损伤行为的影响。观察了辐照过程中二次点缺陷的演变、空洞的形成以及辐照诱导晶界处溶质元素浓度的变化。实验结果表明 :He能促进两类合金空洞核心的增加 ,但空洞尺寸和密度不同 ;He能有效抑制辐照诱起晶界元素偏析 ,但对不同原子尺寸的溶质原子抑制效果不同。Investigation on the effects of helium on the behaviour of irradiation damage in Fe-Cr-Ni and Fe-Cr-Mn alloys during three kinds of irradiation mod in situ observation was carried out using a super-high voltage electron microscope connected with an ion accelerater. Observation of void formation and irradiation induced grain boundary segregation was performed in alloys.The experimental results indicated that helium can promote the formation of void nucleus,increase void size and void density;effectively suppress the segregation of Cr,Mn on the grain boundaries.However helium weakly suppress the enrichment degree of Ni on the grain boundaries. The cause of differences of irradiation damage behaviour between both alloys is that the helium increases the activation energy for void migration and changes the interaction between the point defects and the solute atoms.

关 键 词：氦 FE-CR-NI合金 Fe-Cr-Mn合金 辐照损伤 影响 空洞 溶质原子 点缺陷 核聚变堆 材料 

分 类 号：TL627[核科学技术—核技术及应用]