Behavior of plasma sprayed Cr coatings and FeCrAl coatings on Zr fuel cladding under loss-of-coolant accident conditions

被引：107

作者：

Wang, Yiding ^{[1
]}

Zhou, Wancheng ^{[1
]}

Wen, Qinlong ^{[1
]}

Ruan, Xingcui ^{[1
]}

Luo, Fa ^{[1
]}

Bai, Guanghai ^{[2
]}

Qing, Yuchang ^{[1
]}

Zhu, Dongmei ^{[1
]}

Huang, Zhibin ^{[1
]}

Zhang, Yanwei ^{[2
]}

Li, Tong ^{[3
]}

Li, Rui ^{[3
]}

机构：

[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Sch Mat Sci & Engn, Xian 710072, Shaanxi, Peoples R China

[2] Suzhou Nucl Power Res Inst, Suzhou 215004, Peoples R China

[3] China Nucl Power Technol Res Inst, Shenzhen 518026, Peoples R China

来源：

SURFACE & COATINGS TECHNOLOGY | 2018年 / 344卷

基金：

中国国家自然科学基金;

关键词：

Accident tolerance fuel cladding; Plasma spraying; Cr coatings; FeCrAl coatings; Loss-of-coolant accident; HIGH-TEMPERATURE OXIDATION; SILICON-CARBIDE; ALLOYS; STEAM; IRON; ENVIRONMENTS; CHROMIUM;

D O I：

10.1016/j.surfcoat.2018.03.016

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

To fabricate the oxidation resistance accident tolerance fuel cladding, Cr layer and FeCrAl alloys were deposited on Zircaloy-4 using atmospheric plasma spraying technology. The specimens were exposed under a simulated loss-of-coolant accident condition. XRD, SEM and EDS techniques were carried out to explore their high temperature behavior. According to the analysis results, both Cr coating and FeCrAl coating were successfully prepared by atmospheric plasma spraying system. Cr coating had superior oxidation resistance. Compact Cr2O3 scale forming on Cr coating acted as an oxygen diffusion barrier, whereas FeCrAl coating degraded due to inter-diffusion, leading to its poor protection for the cladding. Difference in standard Gibbs free energy of formation of Fe and Zr caused the prior oxidation of Zr. Accordingly, Zr-rich and Zr-depleted zones occurred in FeCrAl-coated specimens.

引用

页码：141 / 148

页数：8

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