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核技术  2015 

氦离子辐照对镍基合金硬度的影响

DOI: 10.11889/j.0253-3219.2015.hjs.38.070605, PP. 70605-70605

Keywords: 镍基合金,氦离子,辐照,硬度

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Abstract:

在室温下对镍基合金进行了氦离子辐照,利用纳米压痕仪测试了微观硬度,利用慢正电子多普勒展宽谱(DopplerBroadeningSpectrum,DBS)和透射电子显微镜(TransmissionElectronMicroscope,TEM)分析了微观缺陷,利用离子束分析弹性反冲探测(ElasticRecoilDetection,ERD)技术测量了氦的浓度深度分布。结果显示合金样品的硬度随剂量而增大,退火后合金样品硬度增量有所减小,并观测到氦泡生成。合金硬化的主要原因是由于氦离子辐照产生了1?7nm的缺陷团簇,而退火后不稳定缺陷的回复及氦-空位复合体数量的减少造成了硬化强度减弱。

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