Helium ions irradiation-induced surface damage in Fe-based melt-spun ribbons

作     者：Yu-hang Wei Kun Zhang Zi-qiang Zhao Yan-sen Li Bing-chen Wei 

作者机构：Key Laboratory of Microgravity (National Microgravity Laboratory) Institute of Mechanics Chinese Academy ofSciences Beijing 100190 China School of Engineering Science University of Chinese Academy of Sciences Beijing 101408 China School of Physics Peking University Beijing 100871 China 

出 版 物：《Journal of Iron and Steel Research International》 (Journal of Iron and Steel Research, International)

年 卷 期：2018年第25卷第3期

页      面：268-274页

核心收录：

学科分类：080706[工学-化工过程机械] 07[理学] 0806[工学-冶金工程] 08[工学] 0807[工学-动力工程及工程热物理] 070203[理学-原子与分子物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：Acknowledgements The authors would like to acknowledge the support by the National Natural Science Foundation of China (Grant Nos. 51401028  51271193  11402277) and the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB22 040303). The authors also thank to the support of Opening Fund of State Key Lab of Nuclear Physics and Technology at Peking University 

主　　题：Melt-spinning Ion irradiation Fe-based melt-spun ribbon Damage Precipitate phase 

摘      要：The Fe78Si8B14 and Fe78P8B14 ribbons with different wheel speeds were prepared by melt-spinning, and their responses to He＋ ion irradiation were investigated. Previous studies had shown that the ion beam resistance capability of amorphous ribbons was better than their corresponding crystalline counterparts. However, no significant changes on the surface at low fluence are observed. At a relatively higher fluence, both the ribbons prepared at low and high wheel speeds behave the similar irradiation responses： peeling, flaking and multi-layer damages occur. The fully amorphous ribbons prepared at a high wheel speed can accommodate partial incident ions owing to the inherent disordered structure. As the irradiation fluence increases, they fail to accommodate the excess incident ions, which easily aggregate to result in the surface damage. While the partial amorphous ribbons prepared at a low wheel speed possess lots of unstable crystalline grain boundaries owing to the precipitation of Si-or P-rich phase, which may act as the source for the irradiation-induced defects annihilation. Results show that the size and the fraction of precipitate phases in amorphous matrix may play a dominated role in resisting the ion irradiation.