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完成了不同注量或温度下100 keV的He离子注入高纯钨的实验,并利用纳米压痕技术测量了材料的微观力学性能。所有注入样品的纳米硬度值都高于未注入样品的纳米硬度值。对于室温注入样品,随着注量的增加,样品抗弹性变形能力下降;当注量不高于5×1017 ions/cm2时,钨的纳米硬度峰值随着注量的增加而增加;注量为1×1018 ions/cm2的钨样品的纳米硬度峰值反而降低。高温注入样品的抗弹性变形能力优于室温注入样品的抗弹性变形能力;随着注入温度的增加,样品的平均纳米硬度值和弹性模量略有下降。分析讨论了He注入钨硬化和抗弹性形变能力降低的可能原因。

10.11804/NuclPhysRev.30.02.206

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