Damage induced by helium ion irradiation in Fe-based metallic glass
Damage induced by helium ion irradiation in Fe-based metallic glass
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氦离子辐照对铁基金属玻璃的损伤
DOI：
10.1016/j.jnucmat.2017.03.021
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发表时间：
2017
影响因子：
3.1
通讯作者：
Wang Younian
中科院分区：
文献类型：
--
作者：
Zhang Xiaonan;Mei Xianxiu;Zhang Qi;Li Xiaona;Qiang Jianbing;Wang Younian
研究了能量为300 keV的He离子辐照前后Fe_（80）Si_（7.43）B_（12.57）和Fe_（68）Zr_（7 B）_（25）金属玻璃的结构和表面形貌的变化，并与钨的结构和表面形貌进行了比较。结果表明，经He 2+辐照后，非晶合金Fe 68 Zr 7 B 25仍保持非晶状态。当注量为4.0 × 1017 ions/cm ~ 2（19 dpa）时，Fe_（80）Si_（7.43）B_（12.57）金属玻璃中形成了少量的亚稳β-Mn型纳米晶。当注量增加到1.0 × 1018 ions/cm ~ 2（47 dpa）时，纳米晶转变为α-Fe相和四方Fe_2B相。当注量进一步增加时，出现新的正交Fe 3B相和β-Mn型相纳米晶，纳米晶的数量增加。当辐照能量密度为1.0 × 1018 ions/cm ~ 2时，钨表面出现鼓泡和裂纹，而只有当辐照能量密度达到1.6 × 1018 ions/cm ~ 2时，金属玻璃表面才出现裂纹和剥落。
The changes in structure and surface morphology of metallic glasses Fe80Si7.43B12.57and Fe68Zr7B25before and after the irradiation of He ions with the energy of 300 keV were investigated, and were compared with that of the tungsten. The results show that after the He2+irradiation, metallic glass Fe68Zr7B25still maintained amorphous. While a small amount of metastable β-Mn type phase nanocrystals formed in metallic glass Fe80Si7.43B12.57at the fluence of 4.0 × 1017ions/cm2(19dpa). The nanocrystals transformed into α-Fe phase and tetragonal Fe2B phase as the fluence increased to 1.0 × 1018ions/cm2(47dpa). Then the new orthogonal Fe3B phase and β-Mn type phase nanocrystals appeared when the fluence increased further, and the quantities of nanocrystals increased. Blisters and cracks appeared on the surface of tungsten under the irradiation fluence of 1.0 × 1018ions/cm2, however only when the fluence was up to 1.6 × 1018ions/cm2, could cracks and spalling appear on the surfaces of metallic glasses.