A novel Cr-doped Al2O3-SiC-ZrC composite coating for ablative protection of C/C-ZrC-SiC composites

被引：25

作者：

Peng, Zheng ^{[1
]}

Sun, Wei ^{[1
]}

Xiong, Xiang ^{[1
]}

Xu, Yonglong ^{[1
]}

Chen, Yuntian ^{[1
]}

机构：

[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2018年 / 38卷 / 07期

基金：

美国国家科学基金会;

关键词：

C/C-ZrC-SiC; Al2O3-SiC-ZrC composite coating; Cr doped; Ablation; CARBON/CARBON COMPOSITES; OXIDATION BEHAVIOR; MICROSTRUCTURE; INFILTRATION; RESISTANCE; SYSTEM;

D O I：

10.1016/j.jeurceramsoc.2018.02.015

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：

A novel Cr-doped Al2O3-SiC-ZrC coating systemis proposed to further improve the ablation resistance of C/CZrC-SiC composites. Our approach combines low pressure plasma spray method with slurry impregnation of ZrCr-Si-C to achieve a specially tailored oxide-carbide structure. Results show that the as-prepared coating was dense and crack-free, which effectively promoted the ablation resistance of C/C-ZrC-SiC with the mass and linear ablation rates decreased by 66% and 76% respectively, involving a highly dense protective structure of AlxCr2-xO3-SiO2-ZrO2 formed during ablation. The compact and continuous multi-oxide scale with "ZrO2-rosette" skeleton intricated with A1(1.96)Cr(0.04)O(3) was evidenced in the ablation center.

引用

页码：2897 / 2902

页数：6

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