Oxidation Behavior and Oxide Transformation of a Pt-Modified Aluminide Coating at Moderate High Temperature

doi:10.3390/cryst11080972

IMR OpenIR

	Oxidation Behavior and Oxide Transformation of a Pt-Modified Aluminide Coating at Moderate High Temperature
	Li, Yanyan 1,2; Li, Shuai 1,2; Zhang, Chao 3; Xu, Na 1; Bao, Zebin 1,2
通讯作者	Xu, Na(naxu@imr.ac.cn) ; Bao, Zebin(zbbao@imr.ac.cn)
	2021-08-01
发表期刊	CRYSTALS
卷号	11 期号:8 页码:14
摘要	The 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.
关键词	Pt-modified aluminide coating alumina scale single crystal superalloy microstructure isothermal oxidation
资助者	R & D Program in Key Fields of Guangdong Province ; National Engineering Laboratory for Marine and Ocean Engineering Power System-Laboratory for Ocean Engineering Gas Turbine
DOI	10.3390/cryst11080972
收录类别	SCI
语种	英语
资助项目	R & 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研究方向	Crystallography ; Materials Science
WOS类目	Crystallography ; Materials Science, Multidisciplinary
WOS记录号	WOS:000688860900001
出版者	MDPI
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/166832
专题	中国科学院金属研究所
通讯作者	Xu, Na; Bao, Zebin
作者单位	1.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
推荐引用方式 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.