Defect evolution in heavy ion irradiated nanotwinned Cu with nanovoids
Defect evolution in heavy ion irradiated nanotwinned Cu with nanovoids
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DOI：
10.1016/j.jnucmat.2017.09.031
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发表时间：
2017-12
影响因子：
3.1
通讯作者：
C. Fan;Youxing Chen;Jin Li;Jie Ding;Haiyan Wang;Xinghang Zhang
中科院分区：
文献类型：
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作者：
C. Fan;Youxing Chen;Jin Li;Jie Ding;Haiyan Wang;Xinghang Zhang
在透射电子显微镜内以不同的剂量率对外延纳米孪晶铜膜进行 Kr++ 离子照射，该薄膜在畴边界周围具有丰富的纳米空隙。在辐射早期阶段，辐射引起的缺陷簇优先分布在域边界附近。与此同时，预先存在的纳米空隙不断缩小。这项研究表明，纳米孪晶和纳米空隙的独特组合所形成的缺陷网络可以显着增强金属材料的耐辐射性。
Epitaxial nanotwinned Cu film with abundant nanovoids surrounding domain boundaries was subjected to Kr++ion irradiation inside a transmission electron microscope at various dose rates. Irradiation-induced defect clusters distributed preferentially near domain boundaries during the early stage of radiation. Meanwhile, the pre-existing nanovoids continuously shrank. This study suggests that the defect network enabled by the unique combination of nanotwins and nanovoids may significantly enhance the radiation tolerance of metallic materials.