Hydrothermal corrosion behavior of Ti3SiC2 MAX phase at atomic scale under simulated PWR conditions

被引：11
|
作者：
Zhu, Wenjie [1 ]
Li, Xiaoqiang [1 ]
Zheng, Ce [1 ]
Zhang, Congcong [2 ]
Mao, Qingping [1 ]
Bi, Yichun [1 ]
机构：
[1] Northwestern Polytech Univ, Sci & Technol Thermostruct Composite Mat Lab, Xian 710072, Peoples R China
[2] Jilin Univ, Coll Biol & Agr Engn, Changchun 130025, Peoples R China
来源：
CORROSION SCIENCE | 2022年 / 209卷
基金：
中国国家自然科学基金;
关键词：
MAX phase; Accident tolerant fuel cladding; Hydrothermal corrosion; Nuclear materials; X-RAY-DIFFRACTION; ELECTRONIC-STRUCTURE; M(N+1)AX(N) PHASES; RAMAN-SPECTRA; PRIMARY WATER; MECHANISMS; OXIDATION; KINETICS; EXFOLIATION; STABILITY;
D O I：
10.1016/j.corsci.2022.110728
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Corrosion-induced Si-layer escape of Ti3SiC2 and transformation from Ti3SiC2 MAX phase to Ti3C2 nanosheets at atomic scale under simulated PWR conditions were directly observed using double CS-corrected STEM, over-writing the conventional opinion that MAX phase corrodes in the form of corresponding parent MX ceramic. Bipyramidal anatase and nanocuboid rutile particles were confirmed to coexist in the corrosion layer by SAED and HRTEM. Long-term hydrothermal corrosion of Ti3SiC2 indicated its operational reliability in PWR conditions simulated by increasing dissolved oxygen content to accelerate corrosion. This work proposes a reference for the application of Ti3SiC2 in PWR fuel cladding.
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收藏
页数：12
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