Ability of a MoSi2 coating to resist erosion-corrosion from the impact of atomic oxygen

doi:10.1016/j.ceramint.2024.11.158

IMR OpenIR

	Ability of a MoSi2 coating to resist erosion-corrosion from the impact of atomic oxygen
	Liu, Jianxue 1; Wang, Na 1; Sun, Yanbo 1; Yan, Xubo 1; Wei, Shi 1; Kang, Li 1; Du, Baoxian 1; Yang, Wenwen 2; Ma, Ke 3
通讯作者	Liu, Jianxue(1654060931@qq.com) ; Ma, Ke()
	2025
发表期刊	CERAMICS INTERNATIONAL
ISSN	0272-8842
卷号	51 期号:2 页码:1821-1830
摘要	Atomic oxygen (AO), in the residual atmosphere of low-Earth-orbit space, may violently collide with spacecraft at a relative speed of up to 8 km/s and an impact energy of nearly 5 eV/atom. These collisions can lead to a series of physical and chemical reactions that may result in increased sputtering-erosion and corrosion of the exposed surface with performance degradation. This work examined the behavior of MoSi2, a commonly used coating, when exposed to AO using a ground-based space environment simulator. The erosion-corrosion kinetics and evolution of the microstructure and element distributions were analyzed. After MoSi2 was subjected to a total gas fluence of 9.72 x 1022 atoms/cm2 in 675 h, the erosion yield reached an exceptionally low value of 10-28 cm3/ atom, indicative of its superior AO resistance, and XRD, SEM, XPS and EPMA were applied to analyze the phase transition of the coating surface: first it was released of adsorbed gas molecules and contaminants on the coating surface; then outside Mo and Si atoms were also sputtered, and the remaining Mo and Si atoms were gradually oxidized; finally, a continuous protective oxide film was generated which effectively resisting AO collisions. After AO impact, an ultrathin defensive granular oxide layer of MoO3 and SiO2 generated from the original smooth MoSi2 coating. Density functional theory calculations were conducted to clarify the thermodynamic and electronic structure mechanisms underlying the AO oxidation of the MoSi2 coating.
关键词	Atomic oxygen MoSi2 Coating Erosion yield Spacecraft
资助者	Key Project of Beijing Polytechnic College
DOI	10.1016/j.ceramint.2024.11.158
收录类别	SCI
语种	英语
资助项目	Key Project of Beijing Polytechnic College[BGY2020KY-22Z]
WOS研究方向	Materials Science
WOS类目	Materials Science, Ceramics
WOS记录号	WOS:001407690000001
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/321006/180585
专题	中国科学院金属研究所
通讯作者	Liu, Jianxue; Ma, Ke
作者单位	1.Aerosp Res Inst Mat & Proc Technol, Beijing 100076, Peoples R China 2.Beijing Polytech Coll, Sch Basic Educ, Beijing 100042, Peoples R China 3.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	Liu, Jianxue,Wang, Na,Sun, Yanbo,et al. Ability of a MoSi2 coating to resist erosion-corrosion from the impact of atomic oxygen[J]. CERAMICS INTERNATIONAL,2025,51(2):1821-1830.
APA	Liu, Jianxue.,Wang, Na.,Sun, Yanbo.,Yan, Xubo.,Wei, Shi.,...&Ma, Ke.(2025).Ability of a MoSi2 coating to resist erosion-corrosion from the impact of atomic oxygen.CERAMICS INTERNATIONAL,51(2),1821-1830.
MLA	Liu, Jianxue,et al."Ability of a MoSi2 coating to resist erosion-corrosion from the impact of atomic oxygen".CERAMICS INTERNATIONAL 51.2(2025):1821-1830.