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Resistance to Molten Superalloy at 1550 degrees C for Molybdenum Metal Core with a Silica/Silicide Coating
Zhang, Chong1,2; Liu, Enze2; Zheng, Zhi2; Ning, Likui2; Tong, Jian2; Tan, Zheng2; Li, Haiying2
Corresponding AuthorLiu, Enze(nzliu@imr.ac.cn)
2021-03-01
Source PublicationCOATINGS
Volume11Issue:3Pages:11
AbstractThis work designs a silica (SiO2) layer on a molybdenum metal core to provide new insights on the corrosion resistance of the silica/silicide coating in the Ni-based superalloy. The molybdenum substrate coated with MoSi2 by pack cementation was pre-oxidized to fabricate a cristobalite scale on the surface and the preoxidation specimens were chosen to examine the corrosion-resistant property by using a DSM11 superalloy at 1550 degrees C. In order to prepare a cristobalite layer, the microstructure evolution of a 40- mu m MoSi2 coating with the different oxidation parameters (temperature and time) was investigated. After casting test, the different casting results showed that the silicide layer was dissolved in the molten superalloy. However, the molybdenum matrix was found to be protected by the cristobalite layer, as well as accompanied by the cristobalite layer partially destroyed at the core/superalloy interfaces. Furthermore, the reason for the destruction of cristobalite layer was analyzed. The failure mechanism of the cristobalite layer was proposed during the cast process.
Keywordmolybdenum metal core SiO2 layer Superalloy interfacial reactions
DOI10.3390/coatings11030275
Indexed BySCI
Languageen
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Materials Science, Coatings & Films ; Physics, Applied
WOS IDWOS:000633586400001
PublisherMDPI
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/161693
Collection中国科学院金属研究所
Corresponding AuthorLiu, Enze
Affiliation1.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China
2.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Chong,Liu, Enze,Zheng, Zhi,et al. Resistance to Molten Superalloy at 1550 degrees C for Molybdenum Metal Core with a Silica/Silicide Coating[J]. COATINGS,2021,11(3):11.
APA Zhang, Chong.,Liu, Enze.,Zheng, Zhi.,Ning, Likui.,Tong, Jian.,...&Li, Haiying.(2021).Resistance to Molten Superalloy at 1550 degrees C for Molybdenum Metal Core with a Silica/Silicide Coating.COATINGS,11(3),11.
MLA Zhang, Chong,et al."Resistance to Molten Superalloy at 1550 degrees C for Molybdenum Metal Core with a Silica/Silicide Coating".COATINGS 11.3(2021):11.
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