碳离子辐照对纯钨组织结构及表面硬度的影响  

Effects of Carbon Ion Irradiation on Microstructure and Surface Hardness of Pure Tungsten

作　　者：罗春阳 崔博 徐流杰[1] 申华海 宗乐 周晓松[2] 魏世忠[1,3] LUO Chun yang;CUI Bo;XU Liu-jie;SHEN Hua-hai;ZONG Le;ZHOU Xiao-song;WEI Shi-zhong(School of Materials Science and Enginecring,Henan University of Science and Technology,Luoyang 471003,China;Institute of Nuclear Physics and Chemistry,China Academy of Engineering Physics,Mianyang 621900,China;National and Local Joint Engineering Research Center for Abrasion Control and Molding of Metal Materials,Henan University of Science and Technology,L uoyang 471003,China)

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471003 [2]中国工程物理研究院核物理与化学研究所,四川绵阳621900 [3]河南科技大学金属材料磨损控制与成型技术国家地方联合工程研究中心,河南洛阳471003

出　　处：《稀有金属与硬质合金》2022年第4期39-45,共7页Rare Metals and Cemented Carbides

基　　金：国家自然科学基金项目(U1704152);长江学者和高校创新团队项目(IRT1234)。

摘　　要：采用扫描电子显微镜、透射电子显微镜及纳米压痕仪研究了700℃下碳离子辐照对钨的表面形貌、组织结构和表面硬度的影响。结果表明,碳离子辐照会导致样品表面出现辐照蚀坑,且随着辐照剂量的增加,辐照蚀坑尺寸变大。碳离子辐照在样品内部产生了大量位错环,且随辐照剂量增加,位错环数密度和尺寸均增大。碳离子辐照使钨表面发生严重的辐照硬化效应,样品表面硬度随辐照剂量增加明显增大。当辐照剂量达到8.0dpa时,钨表面平均硬度达到15.85GPa。辐照产生的位错环是辐照硬化的主要原因。The effects of carbon ion irradiation at 7oo C on the surface morphology,microstructure and surface hardness of pure tungsten were studied by scanning electron microscopy,transmission electron microscopy and nanoindenter.The results show that carbon ion irradiation can lead to irradiated pits on the surface of the samples,and the size of the pits increases with the increase of irradiation dose.Carbon ion irradiation produces a large number of dislocation loops inside the sample,and the size and number density of the loops increase with the increase of radiation dose.Also,carbon ion irradiation causes a severe irradiation hardening effect on the tungsten surface,and the surface hardness of the samples increases significantly with the increases of irradiation dose.The average hardness of the tungsten surface reaches 15.85 GPa when the irradiation dose reaches 8.0 dpa.The dislocation loops generated by irradiation are the main cause of the irradiation hardening.

关 键 词：钨 碳离子辐照 表面形貌 组织结构 位错环 辐照硬化 硬度 

分 类 号：TG146.411[一般工业技术—材料科学与工程]