Accelerated phase transformation of thermally grown alumina on Ni2Al3: Effect of dispersion of hcp-oxides with various content and particle size and chemistry

doi:10.1016/j.surfcoat.2020.125861

IMR OpenIR

	Accelerated phase transformation of thermally grown alumina on Ni2Al3: Effect of dispersion of hcp-oxides with various content and particle size and chemistry
	Khan, A.; Dong, Z.; Peng, X.
	2020-07-25
Source Publication	SURFACE & COATINGS TECHNOLOGY
Volume	394
Abstract	A promotion in theta-to-a phase transformation of thermally grown alumina on a nickel aluminide coating by dispersing Cr2O3 nanoparticles inside has been reported most recently. In the present work, the nickel aluminide coating has been deliberately dispersed with hexagonal closed pack (hcp)-structured alpha-Al2O3 or Cr2O3 particles which vary in size from nano range to micron range and in content from 2.4 wt% to 6.5 wt%, respectively. The oxidation in air at 900 degrees C leads to several findings: 1) either the finer the size or the higher the content of the oxide particle dispersion, the faster the theta-to-alpha phase transformation, and the lower the oxidation rate, 2) alpha-Al2O3 appears to be more effective than Cr2O3 in facilitating the theta-to-alpha phase transformation; 3) faster theta-to-alpha phase transformation helps to form more adherent thermally grown alumina. The reasons for the results are interpreted.
DOI	10.1016/j.surfcoat.2020.125861
WOS ID	WOS:000542100500038
Citation statistics
Document Type	期刊论文
Identifier	http://ir.imr.ac.cn/handle/321006/82684
Collection	中国科学院金属研究所
Recommended Citation GB/T 7714	Khan, A.,Dong, Z.,Peng, X.. Accelerated phase transformation of thermally grown alumina on Ni2Al3: Effect of dispersion of hcp-oxides with various content and particle size and chemistry[J]. SURFACE & COATINGS TECHNOLOGY,2020,394.
APA	Khan, A.,Dong, Z.,&Peng, X..(2020).Accelerated phase transformation of thermally grown alumina on Ni2Al3: Effect of dispersion of hcp-oxides with various content and particle size and chemistry.SURFACE & COATINGS TECHNOLOGY,394.
MLA	Khan, A.,et al."Accelerated phase transformation of thermally grown alumina on Ni2Al3: Effect of dispersion of hcp-oxides with various content and particle size and chemistry".SURFACE & COATINGS TECHNOLOGY 394(2020).

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