Investigation on Oxidation Resistance of NiCoCrAlY Coating Irradiated by High Current Pulsed Electron Beam

Abstract:

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In this paper, the NiCoCrAlY bond-coats was deposited onto the DZ4 nickel-based superalloy substrate by using low-pressure Plasma Spraying (LPPS) process, and then the coats were irradiated by high-current pulsed electron beam (HCPEB). Phase structures and microstructure of the HCPEB-treated NiCoCrAlY coating were analyzed by SEM, XRD and EDAX. The present results showed that the coating surface was remelted after HCPEB treatments, became smooth, had crater eruption, and the coating hadn’t produced distinct residual stresses. The results of the isothermal oxidations experiment performed in 900°C static air revealed that the oxidation resistance of the coating was enhanced obviously after HCPEB-treated and the oxides were mainly Aluminum-oxides, but without HCPEB-treated, the oxides of coating also had Nickel-oxides.

Info:

Periodical:

Materials Science Forum (Volumes 654-656)

Main Theme:

Edited by:

Jian-Feng Nie and Allan Morton

Pages:

1936-1939

DOI:

10.4028/www.scientific.net/MSF.654-656.1936

Citation:

X. X. Mei et al., "Investigation on Oxidation Resistance of NiCoCrAlY Coating Irradiated by High Current Pulsed Electron Beam", Materials Science Forum, Vols. 654-656, pp. 1936-1939, 2010

Online since:

June 2010

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Price:

$35.00

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