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Phase evolution of reactive sputtering synthesized holmium silicate coatings
Hu, Wanpeng; Zhang, Jie; Nian, Hongqiang; Wang, Jingyang
2019-01-01
Source PublicationJOURNAL OF THE AMERICAN CERAMIC SOCIETY
ISSN0002-7820
Volume102Issue:1Pages:490-497
AbstractHolmium 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.
Keywordenvironmental barrier coatings holmium silicates phase evolution stoichiometry
Indexed BySCI
Language英语
WOS IDWOS:000459932500051
PublisherWILEY
Citation statistics
Document Type期刊论文
Identifierhttp://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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