Pack codeposition of Al and Cr to form diffusion coatings resistant to high temperature oxidation and corrosion for γ-TiAl

Autor:	Z. D. Xiang, P. K. Datta, S. R. Rose
Rok vydání:	2002
Předmět:	Materials science Coating Cementation process Mechanics of Materials Mechanical Engineering Metallurgy engineering Structural integrity General Materials Science engineering.material Condensed Matter Physics Coating deposition Corrosion
Zdroj:	Materials Science and Technology. 18:1479-1484
ISSN:	1743-2847 0267-0836
DOI:	10.1179/026708302225007817
Popis:	Thermochemical analyses were carried out for a series of pack powder mixtures formulated for codepositing Al with Cr to form diffusion coatings on γ-TiAl resistant to high temperature oxidation by the pack cementation process. Based on the results obtained, experimental studies were undertaken to identify optimum pack powder mixtures for codepositing Al with Cr to form diffusion coatings with an adherent and coherent coating structure. The results of the thermochemical calculations performed indicated that codeposition of Al and Cr is possible with CrCl3.6H2O and AlCl3 activated pack powders containing elemental Al and Cr as depositing sources. However, experimental results obtained at 1100°C revealed that CrCl3.6H2O is not suitable for use as an activator for codepositing Al with Cr on γ-TiAl. It caused a significant degree of degradation indicated by weight losses instead of coating deposition to the substrate. However, adherent coatings with excellent structural integrity consisting of an outer...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9d7a7512a625b27640471fb1cd1f6360 https://doi.org/10.1179/026708302225007817 Zobrazit plný text záznamu