期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 41, 期 1, 页码 38-53出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2020.09.011
关键词
Ablation performance; WSi2; ZrSi2; Coating; Ultrahigh temperature ceramic
资金
- National Natural Science Foundation of China [U19A2099]
- CAS key Laboratory of carbon Materials [KLCMKFJJ2005]
A WSi2-ZrSi2 composite-reinforced coating prepared via patterning strengthening method was found to protect C/C composite materials from failure under high temperatures, significantly improving ablation performance by forming a dense oxide layer and expelling oxidation products while analyzing using volatility diagrams.
To improve the ablation performance of carbon/carbon (C/C) composite materials, a WSi2-ZrSi2 composite-reinforced ZrxHf1-xC/SiC coating was prepared on the substrate surface via patterning strengthening method. The results show that this coating can protect the substrate from failure for 300 s under an oxyacetylene flame at 2600 degrees C. Owing to the presence of W, an extremely dense oxide layer was formed on the surface of the coating during initial ablation, which progressively led to the expulsion of the product of oxidation (WO3) from the inner layer, as well as to holes and cracks on healing the coating surface, thereby significantly improving the ablation performance of the C/C composites. In addition, the excellent ablative performance and mechanism of the coating were analysed using volatility diagrams.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据