Exploring the effects of Mn content in the Mn-Co spinel coating on its formation and slowing the outward Cr diffusion

被引：4

作者：

Gao, Jianwei ^{[1
]}

Si, Xiaoqing ^{[1
]}

Wang, Xiaoyang ^{[1
]}

Li, Chun ^{[1
]}

Qi, Junlei ^{[1
]}

Cao, Jian ^{[1
]}

机构：

[1] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Peoples R China

来源：

CORROSION SCIENCE | 2023年 / 217卷

基金：

中国国家自然科学基金;

关键词：

Solid oxide fuel cell; Crofer; 22; H; Mn-Co spinel coating; Diffusion; Area -specific resistance; OXIDE FUEL-CELLS; METALLIC INTERCONNECTS; ELECTRICAL-PROPERTIES; THERMAL-EXPANSION; PROTECTIVE-COATINGS; STAINLESS-STEEL; MANGANESE OXIDE; DOPED MNCO2O4; FE; CATHODE;

D O I：

10.1016/j.corsci.2023.111158

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Effects of Mn content on the performance of Mn-Co spinel coatings are clarified systematically. Two dense spinel coatings are fabricated on Crofer 22 H by microwave sintering and subsequent oxidation. After oxidation at 800 degrees C in air for 400 h, the thickness of the Cr-containing layer of MnCo2O4-coated sample is significantly lower than that of (Mn, Co)3O4-coated sample. The growth mechanism of Cr-containing layer is elucidated from aspects of stabilizing energy and configurational entropy. Controlling Mn3+ content reduces the outward diffusion channels for Cr and avoids the excessive growth of the Cr-containing layer, achieving a lower resistance as well.

引用

页数：11

共 30 条

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