Resistance to He2+ induced irradiation damage in metallic glass Zr64Cu17.8Ni10.7Al7.5

Resistance to He2+ induced irradiation damage in metallic glass Zr64Cu17.8Ni10.7Al7.5
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金属玻璃 Zr64Cu17.8Ni10.7Al7.5 的抗 He2 诱导辐照损伤性能

DOI:
10.1016/j.jnucmat.2013.09.058
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发表时间:
2014
影响因子:
3.1
通讯作者:
梅显秀
梅显秀
中科院分区:
工程技术2区
文献类型:
--
作者:
梅显秀

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本文采用能量为500 keV的He ~(2+)离子辐照金属玻璃Zr_(64)Cu_(17. 8)Ni_(10. 7)Al_(7. 5)和金属W,辐照剂量分别为2 × 10 ~(17)、5 × 10 ~(17)、1 × 10 ~(18)和2 × 10 ~(18)ions/cm ~ 2。Zr基非晶合金在不同的注量下主要保持非晶状态。当辐照能量密度为2 × 1018 ions/cm ~ 2时,在表面离子的作用范围内出现了通道状的损伤层。当注量为1 × 1018 ions/cm 2时,金属W表面发生沿晶界沿着方向的开裂和剥落,当注量为2 × 1018 ions/cm 2时,甚至发生多层剥落。透射电镜分析表明,在氦离子射程末端有大量的氦泡。观察了氦泡的连接和合并生长过程。Zr基金属玻璃表面均方根粗糙度ρ rms随注量的增加先增大后减小。Zr基金属玻璃的抗He ~(2+)辐照性能比金属钨的好上级。
This paper used He2+ion-irradiated metallic glass Zr64Cu17.8Ni10.7Al7.5and metallic W with an energy of 500 keV at fluences of 2 × 1017, 5 × 1017, 1 × 1018and 2 × 1018ions/cm2. Zr-based metallic glass remained mainly amorphous at different fluences. At the irradiation fluence of 2 × 1018ions/cm2, there was a channel-like damage layer appeared within the range of the surface ions. Cracking and peeling along the grain boundary occurred on the surface of metallic W at the fluence of 1 × 1018ions/cm2; or even multi-layer peeling occurred at the fluence of 2 × 1018ions/cm2. TEM analysis revealed that there were a lot of helium bubbles at the end of the range of helium ion. The connection and coalescence growth process of a helium bubble was observed. The surface rms roughnessρrmsof Zr-based metallic glass increased first and then decreased with the increase in fluence. The resistance to He2+irradiation in Zr-based metallic glass was superior to the one in metallic tungsten.
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