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大块金属玻璃Al7.5Cu17.8Ni10.7Zr64的耐Ar12+离子辐照性能研究
Anti-radiation Performance Against Ar12+ Ions of Bulk Metallic Glass Al7.5Cu17.8Ni10.7Zr64
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摘要: 利用能量为3 MeV的Ar12+离子辐照金属玻璃Al7.5Cu17.8Ni10.7Zr64和金属W，研究了金属玻璃的Ar离子辐照损伤，辐照剂量分别为1×1014，1×1015和1×1016 ions/cm2。XRD分析发现在不同剂量辐照下Al7.5Cu17.8Ni10.7Zr64均保持非晶为主要结构。不同剂量辐照后的金属玻璃样品表面没有明显的辐照损伤，而金属W在剂量为1×016 ions/cm2时表面出现大面积不规则的裂纹和孔洞。AFM分析显示Al7.5Cu17.8Ni10.7Zr64的表面均方根粗糙度随辐照剂量的增大而增大；辐照后金属玻璃的表面硬度略有降低，而金属W的硬度有所升高。在低于金属玻璃的玻璃化转变温度时，金属玻璃Al7.5Cu17.8Ni10.7Zr64的耐Ar12+溅射能力好于金属W。Abstract: Ar12+ions with the energy of 3 MeV were used to irradiate the metallic glass Al7.5Cu17.8Ni10.7Zr64 and metal tungsten, in order to study the irradiation damage of metallic glasses. The irradiation dos was 1×1014, 1×1015 and 1×1016 ions/cm2, respectively. The XRD analysis showed that Al7.5Cu17.8Ni10.7Zr64 remained amor-phous structure after irradiation exposure to different doses. After irradiation, there was no obvious irradiation damage on the surface of the metallic glass, while a large area of irregular cracks and holes were found on the surface of metal tungsten when the dose is up to 1×1016 ions/cm2. The AFM result showed the surface root-mean-square roughness of Al7.5Cu17.8Ni10.7Zr64 increased with the increase of irradiation doses. The surface hardness of the metallic glass decreased slightly, while the hardness of metal tungsten increased after irradiation. It is concluded that the anti-radiation performance against Ar12+ ions of metallic glass Al7.5Cu17.8Ni10.7Zr64 was better than metal tungsten when irradiated at temperatures below the glass-transition temperature of the metallic glass Al7.5Cu17.8Ni10.7Zr64.
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