High temperature oxidation behavior of plasma sprayed chromium boride-chromium carbide composite coatings

被引：2

作者：

Guo, Ming-yan ^{[1
]}

Yang, Yong ^{[1
,3
]}

Li, Ke-ran ^{[1
]}

Ren, Xian-xing ^{[1
]}

Tian, Wei ^{[2
]}

Wang, Yan-wei ^{[1
]}

机构：

[1] Hebei Univ Technol, Sch Mat Sci & Engn, State Key Lab Reliabil & Intelligence Elect Equipm, Tianjin Key Lab Mat Laminating Fabricat & Interfac, Tianjin 300132, Peoples R China

[2] AECC Sichuan Gas Turbine Estab, Chengdu 610500, Sichuan, Peoples R China

[3] Xiping Rd 5340, Tianjin 300401, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2023年 / 49卷 / 14期

基金：

中国国家自然科学基金;

关键词：

Plasma spraying; CrB 2-Cr 3 C 2 composite Coating; In -situ synthesis; High temperature oxidation; RESISTANCE; DIBORIDE; CRB2; HVOF; PERMEATION; DEPOSITION;

D O I：

10.1016/j.ceramint.2023.04.172

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The high temperature oxidation behavior of plasma sprayed chromium boride-chromium carbide composite coatings had been studied in this work. In-situ and ex-situ CrB2-Cr3C2 composite coatings were prepared by plasma spraying Cr-B4C and CrB2-Cr3C2 composite powders, respectively. The changes of microstructure and phase of two coatings after oxidation at different temperature and time were studied. After oxidation at 850 & DEG;C for 10 h, the in-situ Cr-B4C coating had a thinner oxide layer (8-10 & mu;m) and a lower weight gain rate (0.023%) than ex-situ CrB2-Cr3C2 coating. This is because the density of Cr-B4C coating was high, and the oxidized glass phase B2O3 gradually filled the pores of the coating at 850 & DEG;C. For oxidation of CrB2-Cr3C2 coating at 1000 & DEG;C for 10 h, since the evaporation rate was higher than the generation rate of liquid oxide layers, a large penetration cracks damaged the integrity of the coating surface, which would not hinder oxygen into the coating. The Cr-B4C coating had better oxidation resistance after oxidation at 1000 & DEG;C for 10 h, because more phases with low oxygen permeability were formed in the coating, and the generation rate of the oxide film was higher than the evaporation rate.

引用

页码：23399 / 23409

页数：11

共 36 条

[1] The effect of pulsed magnetron sputtering on the structure and mechanical properties of CrB2 coatings [J].