ZrB2 particles reinforced glass coating for oxidation protection of carbon/carbon composites

被引：0

作者：

Cuiyan LI ^{[1
]}

Guibiao LI ^{[1
]}

Haibo OUYANG ^{[1
]}

Jing LU ^{[1
]}

机构：

[1] School of Materials Science & Engineering, Shaanxi University of Science & Technology

来源：

Journal of Advanced Ceramics | 2019年 / 01期

基金：

中国国家自然科学基金;

关键词：

ZrB2/SiO2; coating; silica sol; dipping; oxidation resistance;

D O I：

暂无

中图分类号：

TB306 [];

学科分类号：

0805 ; 080502 ;

摘要：

A dense ZrBparticles reinforced glass(ZrB/SiO) coating was prepared on the SiC coated carbon/carbon composites by a facile sol-dipping approach. The prepared ZrB2/SiO2 coating could protect the composites from being oxidized for 160 h at 1773 K with a weight loss of 6.9 mg/cm~2. The flexural strength retention ratio of the ZrB/SiOcoated composites is 87% after oxidation for 160 h at1773 K. The continuous SiOglass layer embedded with the submicron ZrSiOparticles was formed during oxidation. This was helpful to lower the diffusion rate of oxygen and improve the stability of SiOglass film, thus improving the oxidation resistance of the coated samples. After thermal cycles between 1773 K and room temperature for 15 times, penetrated cracks formed in the coating. The weight loss of the ZrB/SiOcoated sample presented linear relationship, and the final weight loss per unit area was 6.35 mg/cm~2. The generation of the penetrative cracks and the debonded coating interface resulted in the failure of the ZrB/SiOcoating.

引用

页码：102 / 111

页数：10

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