Hot Corrosion Resistant NiAl Coating Formed by Chemical Vapor Deposition for Gas Turbine Bucket

Autor:	Yoshitaka Kojima, Yamaguchi Shizuka
Rok vydání:	1992
Předmět:	Nial Materials science Diffusion Metallurgy General Engineering Chemical vapor deposition engineering.material Chemical reaction Superalloy Coating engineering Deposition (phase transition) Layer (electronics) computer computer.programming_language
Zdroj:	Journal of the Surface Finishing Society of Japan. 43:839-843
ISSN:	1884-3409 0915-1869
DOI:	10.4139/sfj.43.839
Popis:	NiAl was deposited by reduced pressure CVD to form hot corrosion resistant coatings for the cooling pessages of heavy duty gas turbine buckets.AlCl3 and AlCl were used as chemical reaction gases with H2 gas as carrier gas. An NiAl coating layer was formed by deposition and subsequent diffusion of Al into Ni base superalloy. Optimum coating conditions were surveyed to obtain a uniform coating thickness for the complex shaped cooling passage utilizing a simulation model.It was found that in the model bucket cooling passage the ratio of NiAl layer thickness at the outlet to that at the inlet was about 45% under coating conditions of 950-1000°C and 20-40Torr and using a reverse flow prevention device.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1a681d9439a8ac01a9f0b5092ffd5e7e https://doi.org/10.4139/sfj.43.839 Zobrazit plný text záznamu