Phase evolution of reactive sputtering synthesized holmium silicate coatings

IMR OpenIR

	Phase evolution of reactive sputtering synthesized holmium silicate coatings
	Hu, Wanpeng; Zhang, Jie; Nian, Hongqiang; Wang, Jingyang
	2019
Source Publication	JOURNAL OF THE AMERICAN CERAMIC SOCIETY
ISSN	0002-7820
Volume	102 Issue:1 Pages:490-497
Abstract	Holmium silicates are promising environmental barrier coatings (EBCs) materials for Si-based non-oxide ceramics due to their excellent thermal and mechanical properties. In the present work, the phase evolution of holmium silicate coatings synthesized by reactive sputtering was systematically studied. The monosilicate crystallized in an X1-Ho2SiO5 phase at 1000 degrees C and transformed to an X2-Ho2SiO5 phase at 1200 degrees C. The phase transition is not problematic for the coating process because the X1- and X-2-Ho2SiO5 phases have similar coefficients of thermal expansion (CTEs). For the holmium disilicates, the stoichiometry obviously influenced polymorphic phase evolutions. Relatively Ho2O3-rich compounds promoted the formation of gamma-Ho2Si2O7 phase at lower temperatures. This study on phase evolution vs temperature and stoichiometry can provide a guideline to optimize the processing and the properties of advanced holmium silicate EBCs.
Keyword	environmental barrier coatings holmium silicates phase evolution stoichiometry
Indexed By	SCI
Language	英语
WOS ID	WOS:000459932500051
Publisher	WILEY
Citation statistics	Cited Times:1[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.imr.ac.cn/handle/321006/81481
Collection	中国科学院金属研究所
Recommended Citation GB/T 7714	Hu, Wanpeng,Zhang, Jie,Nian, Hongqiang,et al. Phase evolution of reactive sputtering synthesized holmium silicate coatings[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY,2019,102(1):490-497.
APA	Hu, Wanpeng,Zhang, Jie,Nian, Hongqiang,&Wang, Jingyang.(2019).Phase evolution of reactive sputtering synthesized holmium silicate coatings.JOURNAL OF THE AMERICAN CERAMIC SOCIETY,102(1),490-497.
MLA	Hu, Wanpeng,et al."Phase evolution of reactive sputtering synthesized holmium silicate coatings".JOURNAL OF THE AMERICAN CERAMIC SOCIETY 102.1(2019):490-497.

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