Effect of Ar Ion Irradiation on Microstructure and Corrosion Resistance of Zr-0.75Sn-1Nb-0.35Fe-0.15Cr Alloy

被引：0

作者：

Gu, Zhiyuan ^{[1
]}

Wu, Yue ^{[1
]}

Lin, Xiaodong ^{[1
,2
]}

Yao, Meiyi ^{[1
]}

Hu, Lijuan ^{[1
]}

Liang, Xue ^{[1
]}

Li, Yifeng ^{[1
,2
]}

Peng, Jianchao ^{[1
,2
]}

Xie, Yaoping ^{[1
]}

Zhou, Bangxin ^{[1
]}

机构：

[1] Shanghai Univ, Inst Mat, Shanghai 200072, Peoples R China

[2] Shanghai Univ, Lab Microstruct, Shanghai 200444, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2024年 / 53卷 / 06期

关键词：

zirconium alloy; irradiation; corrosion; oxide film; second phase particle; ZIRCONIUM ALLOY; AMORPHIZATION; EVOLUTION; PRECIPITATE; BEHAVIOR; PROTON;

D O I：

10.12442/j.issn.1002-185X.20230206

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Zr-0.75Sn-1Nb-0.35Fe-0.15Cr (wt%) alloy plates were prepared by smelting, hot rolling, cold rolling and annealing techniques successively. The samples were then irradiated on an electrostatic accelerator with Ar+ + to a influence of 1.02x1015 15 and 5.1x1015 15 ions/cm2 2 (corresponding to 1 dpa and 5 dpa, respectively) at 300 degrees C. Both the unirradiated and irradiated samples were exposed to 360 degrees C/18.6 MPa/ 0.01 mol/L LiOH aqueous solution for 90 d. The microstructures of the alloy matrix before and after irradiation and the oxide film formed after corrosion were characterized by SEM and TEM. The results show that before irradiation the alloy is fully recrystallized and the grains are equiaxed. The second phase particles are mainly Zr(Fe,Cr,Nb)2 2 with a fcc or hcp structure, and their size is within the range of 50 100 nm. After irradiation, -type dislocation loops were observed in the irradiated region of the alloy, and the second phase particles are completely amorphous, but the element diffusion from the second phase particles to the matrix is not found. After corrosion for 90 d, the oxide film of the irradiated samples is thinner than that of the unirradiated sample, indicating that Ar+ + irradiation decreases the corrosion rate of the alloy to some extent at early stage of corrosion. This can be explained by the fact that Ar+ + irradiation could delay the microstructural evolution of oxide film, including reducing the proportion of equiaxed grains and the number of cracks in the oxide film, as well as slowing down the oxidation of amorphous second phase particles induced by irradiation, thus enhancing the protectiveness of the oxide film.

引用

页码：1642 / 1653

页数：12

共 26 条

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