Chemical compatibility between the α-Al2O3 tritium permeation barrier and Li4SiO4 tritium breeder

被引：12

作者：

Zhang, Wei ^{[1
]}

Zhu, Changda ^{[1
]}

Yang, Jian ^{[1
]}

Chen, Qingsong ^{[1
]}

Wang, Long ^{[2
]}

Feng, Yongjin ^{[2
]}

Feng, Kaiming ^{[2
]}

Liao, Jiali ^{[1
]}

Yang, Yuanyou ^{[1
]}

Liu, Ning ^{[1
]}

Yang, Jijun ^{[1
]}

机构：

[1] Sichuan Univ, Inst Nucl Sci & Technol, Minist Educ, Key Lab Radiat Phys & Technol, Chengdu 610064, Peoples R China

[2] Southwestern Inst Phys, Chengdu 610225, Peoples R China

来源：

SURFACE & COATINGS TECHNOLOGY | 2021年 / 410卷

基金：

中国国家自然科学基金;

关键词：

Li4SiO4; Al(2)O(3 )coating; Corrosion; Tritium breeding blanket; CERAMIC BREEDER; CORROSION SUSCEPTIBILITY; LITHIUM CERAMICS; LIQUID LITHIUM; HCCB TBM; COATINGS; BEHAVIOR; STEEL; EUROFER97; ALUMINA;

D O I：

10.1016/j.surfcoat.2021.126960

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

alpha-Al2O3 tritium permeation barriers were exposed in a 1-MPa He+0.5-MPa H-2 atmosphere to Li4SiO4 ceramic tritium breeder at 623 K for 120-1000 h, to evaluate its chemical compatibility in a simulated breeder blanket environment. The as-deposited coating is composed of the alpha-Al2O3 phase with a uniform and dense surface morphology. The short-term (below 360 h) effects of corrosion are almost negligible. However, the morphology and structure of the coating change significantly when the corrosion time reaches 1000 h, and grain boundary corrosion, delamination, holes and corrosion products of LiAlO2 are observed. A microscopic model is proposed to understand the corrosion mechanism of the alpha-Al2O3 coating in contact with the Li4SiO4 ceramic.

引用

页数：9

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