| 陈汉,胡蓉,靳慎豹,薛飞,沙刚.Fe-Ni-Si三元合金辐照诱发的Ni-Si团簇形核及生长演变机制[J].装备环境工程,2022,19(1):26-33. CHEN Han,HU Rong,JIN Shen-bao,XUE Fei,SHA Gang.Nucleation and Growth of Irradiation-Induced Ni-Si Clusters in Fe-Ni-Si Ternary Alloy[J].Equipment Environmental Engineering,2022,19(1):26-33. |
| Fe-Ni-Si三元合金辐照诱发的Ni-Si团簇形核及生长演变机制 |
| Nucleation and Growth of Irradiation-Induced Ni-Si Clusters in Fe-Ni-Si Ternary Alloy |
| 投稿时间：2021-06-25 修订日期：2021-07-20 |
| DOI：10.7643/issn.1672-9242.2022.01.004 |
| 中文关键词: 辐照 团簇 三维原子探针 纳米压痕 Fe-Ni-Si中图分类号:TG172 文献标识码:A 文章编号:1672-9242(2022)01-0026-08 |
| 英文关键词:irradiation clusters atom probe tomography nano-indentation Fe-Ni-Si |
| 基金项目:国家重点研发计划(2017YFB0702204)；国家自然科学基金青年基金(51701097)；江苏省自然科学基金青年基金(BK20170843) |
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| Author | Institution |
| CHEN Han | Department of Materials Science and Engineering/Herbert Gleiter Institute of Nanoscience, Nanjing University of Science and Technology, Nanjing 210094, China |
| HU Rong | Department of Materials Science and Engineering/Herbert Gleiter Institute of Nanoscience, Nanjing University of Science and Technology, Nanjing 210094, China |
| JIN Shen-bao | Department of Materials Science and Engineering/Herbert Gleiter Institute of Nanoscience, Nanjing University of Science and Technology, Nanjing 210094, China |
| XUE Fei | Suzhou Nuclear Power Research Institute, Suzhou 215004, China |
| SHA Gang | Department of Materials Science and Engineering/Herbert Gleiter Institute of Nanoscience, Nanjing University of Science and Technology, Nanjing 210094, China |
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| 中文摘要: |
| 目的 探索辐照条件下Ni与Si元素的相互作用对RPV合金中团簇形成演变的影响。方法 对PRV合金的三元模型合金Fe-Ni-Si做离子辐照实验，并采用原子探针技术对团簇进行分析，采用纳米压痕技术进行硬度分析。结果 纳米压痕的结果表明，材料的硬度随辐照剂量的升高而增大。原子探针结果表明，辐照后材料中产生了Ni-Si溶质团簇，且随着辐照剂量的增加，团簇的数量密度与体积分数都呈现增大趋势。在不同的辐照剂量下，团簇中的Si/Ni不同，随着团簇尺寸的增大，Si/Ni比呈现上升趋势。结论 在低剂量时，Ni-Si团簇处于早期独立形核阶段，团簇内的Ni占比较高；高剂量时，Ni-Si团簇的合并生长占主导地位，且主要以大团簇吞并小团簇的方式生长；团簇中Si的质量分数随着团簇的尺寸增加而增大。 |
| 英文摘要: |
| In order to investigate the effects of interaction between Ni and Si on formation and evolution of clusters in RPV alloy, ion-irradiated experiments were carried out on Fe Ni Si ternary model alloy of PRV steel. The clusters were analyzed by using atom probe tomography (APT) and the hardness was analyzed by nano-indentation technology. The nano-indentation results indicated that the hardness of the samples increased with increasing in the irradiation dose. The atom probe results indicated that irradiation introduced formation of Ni-Si solute clusters in the alloy. The number density and volume fraction of the solute clusters increased with increasing dose. The Si/Ni ratio of the clusters are different under different irradiation doses. With the increase of cluster size, the Si/Ni ratio shows an upward trend. In conclusion, at the low dose, the Ni-Si clusters are in their early stage formation with a high Ni concentration; at the high dose, the growth of Ni-Si clusters is predominant, and mainly via large clusters merging with small clusters. Furthermore, the mass fraction of Si in clusters increases with the increase of cluster size. |
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