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Oxidation Behavior and Oxide Transformation of a Pt-Modified Aluminide Coating at Moderate High Temperature
Li, Yanyan1,2; Li, Shuai1,2; Zhang, Chao3; Xu, Na1; Bao, Zebin1,2
Corresponding AuthorXu, Na(naxu@imr.ac.cn) ; Bao, Zebin(zbbao@imr.ac.cn)
2021-08-01
Source PublicationCRYSTALS
Volume11Issue:8Pages:14
AbstractThe oxidation performance of a single-phase Pt-modified aluminide coating was assessed in oxidation test at 980 degrees C in comparison with the single crystal superalloy. The results suggested that the Pt-modified aluminide coating exhibited superior oxidation resistance. During oxidation, the oxide scale formed on bare alloy changed constantly followed by the constitution of the multi-layer scale structure: An outer scale mainly consisted of Cr2O3 + NiCr2O4 + TiO2 with scarce protection, and an internal scale mainly consisted of Al2O3. The thickness of the outer oxide scale increased with time, where the scale became looser and more porous. Meanwhile, the internal scale was discontinuous. Oxygen and nitrogen inwardly diffused into substrate, forming Ta2O5 and TiN particles. In contrast to the complex constitution of oxide scale, a uniform and continuous Al2O3 scale formed on Pt-modified aluminide-coated samples after oxidation at 980 degrees C for 1500 h, which showed no spallation and cracking. Interestingly, theta-Al2O3 and alpha-Al2O3 phases remained after such a long oxidation time. It is the relatively lower temperature and the presence of Pt retarded theta-alpha transformation. The degradation rate from beta-NiAl to gamma '-Ni3Al was very slow in the coating. The various development of oxide scale on the coating and substrate was individually studied.
KeywordPt-modified aluminide coating alumina scale single crystal superalloy microstructure isothermal oxidation
Funding OrganizationR & D Program in Key Fields of Guangdong Province ; National Engineering Laboratory for Marine and Ocean Engineering Power System-Laboratory for Ocean Engineering Gas Turbine
DOI10.3390/cryst11080972
Indexed BySCI
Language英语
Funding ProjectR & D Program in Key Fields of Guangdong Province[2019B010936001] ; National Engineering Laboratory for Marine and Ocean Engineering Power System-Laboratory for Ocean Engineering Gas Turbine
WOS Research AreaCrystallography ; Materials Science
WOS SubjectCrystallography ; Materials Science, Multidisciplinary
WOS IDWOS:000688860900001
PublisherMDPI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/166832
Collection中国科学院金属研究所
Corresponding AuthorXu, Na; Bao, Zebin
Affiliation1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Wencui Rd 62, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Wenhua Rd 72, Shenyang 110016, Peoples R China
3.703 Res Inst CSSC, Natl Engn Lab Marine & Ocean Engn Power Syst, Honghu Rd 35, Harbin 150078, Peoples R China
Recommended Citation
GB/T 7714
Li, Yanyan,Li, Shuai,Zhang, Chao,et al. Oxidation Behavior and Oxide Transformation of a Pt-Modified Aluminide Coating at Moderate High Temperature[J]. CRYSTALS,2021,11(8):14.
APA Li, Yanyan,Li, Shuai,Zhang, Chao,Xu, Na,&Bao, Zebin.(2021).Oxidation Behavior and Oxide Transformation of a Pt-Modified Aluminide Coating at Moderate High Temperature.CRYSTALS,11(8),14.
MLA Li, Yanyan,et al."Oxidation Behavior and Oxide Transformation of a Pt-Modified Aluminide Coating at Moderate High Temperature".CRYSTALS 11.8(2021):14.
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