Oxidation resistance and microstructure evolution of ZrB2-SiC-La2O3/SiC dual-layer coating on siliconized graphite at 1800 degrees C under low air pressures

doi:10.1016/j.ceramint.2020.07.195

IMR OpenIR

	Oxidation resistance and microstructure evolution of ZrB2-SiC-La2O3/SiC dual-layer coating on siliconized graphite at 1800 degrees C under low air pressures
	Ren, Yan 1,2; Qian, Yuhai 1; Xu, Jingjun 1; Zuo, Jun 1; Li, Meishuan 1
通讯作者	Qian, Yuhai(yhqian@imr.ac.cn)
	2020-12-01
发表期刊	CERAMICS INTERNATIONAL
ISSN	0272-8842
卷号	46 期号:17 页码:27150-27157
摘要	The oxidation behaviors of a ZrB2-SiC-La2O3/SiC dual-layer coating on siliconized graphite at 1800 degrees C under low air pressures (50, 5 and 0.5 kPa) were investigated. The results showed that with the decrease of air pressure, the oxidation kinetics of the coated samples changed from parabolic weight gain to linear weight loss. A protective oxide scale consisted of ZrO2 and SiO2 with La dispersed was formed on the coating surface after oxidation in 50 kPa air. The oxide scale formed in 5 kPa air was full of bubbles. Only porous ZrO2 layer was left on the coating surface after oxidation in 0.5 kPa air. At 1800 degrees C, the active oxidation of SiC occurred and gaseous SiO formed at the coating/oxide interface. The surface volatilization of SiO became severe with the decrease of air pressure, resulting in the presence of non-protective oxide scale.
关键词	Coating Oxidation resistance Graphite Low pressure air
资助者	National Natural Science Foundation of China
DOI	10.1016/j.ceramint.2020.07.195
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51571205] ; National Natural Science Foundation of China[51571203]
WOS研究方向	Materials Science
WOS类目	Materials Science, Ceramics
WOS记录号	WOS:000577586400077
出版者	ELSEVIER SCI LTD
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/141028
专题	中国科学院金属研究所
通讯作者	Qian, Yuhai
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Ren, Yan,Qian, Yuhai,Xu, Jingjun,et al. Oxidation resistance and microstructure evolution of ZrB2-SiC-La2O3/SiC dual-layer coating on siliconized graphite at 1800 degrees C under low air pressures[J]. CERAMICS INTERNATIONAL,2020,46(17):27150-27157.
APA	Ren, Yan,Qian, Yuhai,Xu, Jingjun,Zuo, Jun,&Li, Meishuan.(2020).Oxidation resistance and microstructure evolution of ZrB2-SiC-La2O3/SiC dual-layer coating on siliconized graphite at 1800 degrees C under low air pressures.CERAMICS INTERNATIONAL,46(17),27150-27157.
MLA	Ren, Yan,et al."Oxidation resistance and microstructure evolution of ZrB2-SiC-La2O3/SiC dual-layer coating on siliconized graphite at 1800 degrees C under low air pressures".CERAMICS INTERNATIONAL 46.17(2020):27150-27157.