Oxidation and thermal shock resistant properties of Si/Yb2SiO5/NdMgA11O19 coating deposited on Cf/SiC composites

被引：29

作者：

Fan, Cunyan ^{[1
,2
]}

Zou, Binglin ^{[2
]}

Zhu, Ling ^{[1
]}

Fan, Wenjuan ^{[1
,2
]}

Cai, Xiaolong ^{[2
]}

Wang, Ying ^{[2
]}

Cao, Xueqiang ^{[2
,3
]}

机构：

[1] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410114, Hunan, Peoples R China

[2] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resources Utilizat, Changchun 130022, Jilin, Peoples R China

[3] Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430070, Peoples R China

来源：

MATERIALS & DESIGN | 2017年 / 116卷

基金：

中国国家自然科学基金;

关键词：

Coating; Oxidation protection; Atmospheric plasma spraying; Thermal shock test;

D O I：

10.1016/j.matdes.2016.12.022

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Yb2SiO5 and NdMgAl11O19 (NMA) powders were synthesized by solid-state reactions. Triple-layer ceramic coatings based on the Si bond layer, Yb2SiO5 interlayer and NMA top layer were prepared on carbon fiber reinforced silicon carbide ceramic matrix (C-f/SiC) composites by atmospheric plasma spraying CAPS). The coatings were subjected to thermal shock tests at 1300 degrees C, 1400 degrees C and 1450 degrees C, respectively. The results showed that the Si! Yb2SiO5/NMA coating significantly improved the oxidation resistance of Cf/SiC composites. The failure mechanism of the Si/Yb2SiO5/NMA coating was closely related to the thermal shock temperature. Below 1400 degrees C, the failure of the coating was connected with the mismatch of thermal expansion coefficient (CTE) between the coating and substrate, the reaction between Yb2SO5 and NMA at the interface, the poor sintering property of Yb2SiO5 and NMA and the substrate itself. Above 1450 degrees C, the coating failed after only one thermal shock cycle due to the temperature higher than the melting point of the silicon. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：261 / 267

页数：7