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

CORC > 金属研究所 > 中国科学院金属研究所

	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 2; Xu, Jingjun 2; Zuo, Jun 2; Li, Meishuan 2
刊名	CERAMICS INTERNATIONAL
	2020-12-01
卷号	46 期号:17 页码:27150-27157
关键词	Coating Oxidation resistance Graphite Low pressure air
ISSN号	0272-8842
DOI	10.1016/j.ceramint.2020.07.195
通讯作者	Qian, Yuhai(yhqian@imr.ac.cn)
英文摘要	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.
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
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000577586400077
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/141027]
专题	金属研究所_中国科学院金属研究所
通讯作者	Qian, Yuhai
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 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.