Grain boundary engineering for control of tellurium diffusion in GH3535 alloy

被引：25

作者：

Fu, Cai-Tao ^{[1
]}

Wang Yinling ^{[2
]}

Chu, Xiang-Wei ^{[1
]}

Li Jiang ^{[3
]}

Zhang, Wen-Zhu ^{[4
]}

Qin Bai ^{[4
]}

Shuang Xia ^{[4
]}

Bin Leng ^{[3
]}

Li, Zhi-Jun ^{[3
]}

Ye, Xiang-Xi ^{[3
]}

Fang Liu ^{[1
]}

机构：

[1] Univ Shanghai Sci & Technol, Sch Mat Sci & Engn, Shanghai 200093, Peoples R China

[2] Huanghuai Univ, Coll Mech & Energy Engn, Zhumadian 463000, Peoples R China

[3] Chinese Acad Sci, Shanghai Inst Appl Phys, Thorium Molten Salts Reactor Ctr, Shanghai 201800, Peoples R China

[4] Shanghai Univ, Sch Mat Sci & Engn, Shanghai 200072, Peoples R China

来源：

JOURNAL OF NUCLEAR MATERIALS | 2017年 / 497卷

基金：

中国国家自然科学基金;

关键词：

Grain-clusters; Tellurium diffusion; EPMA; EBSD; Grain boundary engineering; GH3535; alloy; LOW-OXYGEN POTENTIALS; MOLTEN-SALT REACTOR; MO-CR SUPERALLOY; CARBIDE PRECIPITATION; SUPERCRITICAL WATER; OXIDATION BEHAVIOR; STAINLESS-STEEL; M6C CARBIDE; CORROSION; TEMPERATURE;

D O I：

10.1016/j.jnucmat.2017.10.052

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of grain boundary engineering (GBE) on the Te diffusion along the surface grain boundaries was investigated in GH3535 alloy. It can be found that GBE treatment increases obviously the fraction of low-Sigma coincidence site lattice (CSL) boundaries, especially the Sigma 3 ones, and introduces the large-size grain clusters. When the as-received (AR) and GBE-treated (GBET) specimens were exposed to Te vapor, only Sigma 3 boundaries were found to be resistant to Te diffusion. From the cross section and the surface, the fewer Te-attacked grain boundaries and the thinner corrosion layer can be observed in the GBET sample. The improvement of resistance to Te diffusion in the GBET sample can be attributed to the large size grain-clusters associated with high proportion of the Sigma 3(n) boundaries. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：76 / 83

页数：8

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