In situ study on heavy ion irradiation induced microstructure evolution in single crystal Cu with nanovoids at elevated temperature

被引：4

作者：

Niu, Tongjun ^{[1
]}

Rayaprolu, Sreekar ^{[1
]}

Shang, Zhongxia ^{[1
,7
]}

Sun, Tianyi ^{[1
]}

Fan, Cuncai ^{[2
]}

Zhang, Yifan ^{[1
,3
]}

Shen, Chao ^{[1
]}

Nasim, Md ^{[4
]}

Chen, Wei-ying ^{[5
]}

Li, Meimei ^{[5
]}

Xue, Yexiang ^{[4
]}

Wang, Haiyan ^{[1
,6
]}

El-Azab, Anter ^{[1
]}

Zhang, Xinghang ^{[1
]}

机构：

[1] Purdue Univ, Sch Mat Engn, W Lafayette, IN 47907 USA

[2] Univ Hong Kong, Dept Mech Engn, Hong Kong 999077, Peoples R China

[3] Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545 USA

[4] Purdue Univ, Dept Comp Sci, W Lafayette, IN 47907 USA

[5] Argonne Natl Lab, Nucl Engn Div, Argonne, IL 60439 USA

[6] Sch Elect & Comp Engn, W Lafayette, IN 47907 USA

[7] Purdue Univ, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USA

来源：

MATERIALS TODAY COMMUNICATIONS | 2022年 / 33卷

关键词：

In situ radiation; Nanovoids; Thin films; Phase field simulations; Radiation damage; STACKING-FAULT TETRAHEDRA; NEUTRON; ALLOYS; DAMAGE; FCC; SHRINKAGE; CLUSTERS; METALS; COPPER;

D O I：

10.1016/j.mtcomm.2022.104418

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Understanding the response of nanovoids to irradiation damage advances our capability to design radiation tolerant materials. Recent in situ studies reveal the shrinkage of hexagon-shaped nanovoids in (110) textured Cu. However, the evolution of voids with irregular geometries under irradiation is less well understood. Here, in situ Kr ion irradiation was performed at 100 degrees C on single-crystal Cu (112) that possesses nanovoids with high aspect ratio. In situ studies show these elongated voids fragment into smaller voids and shrink gradually with increasing dose. Phase field simulations confirm that fragmentation of the void is governed by the competing kinetics between atoms diffusing toward and away from the elongated nanovoid. Post irradiation analysis reveals the formation of high-density defect clusters.

引用

页数：7

共 41 条

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