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Abstract：
NiCrCoAlY particles and coatings were prepared by plasma spraying technique. The oxidation behavior of NiCrCoAlY particles in the plasma spraying process and the influence of shrouding gas on high-temperature oxidation resistance of NiCrCoAlY coatings were investigated. The results show that there are two oxidation mechanisms during in-flight oxidation. One is convective oxidation, and the other is diffusion oxidation. In the plasma zone whose distance to the nozzle is less than 55 mm, convective oxidation is the dominating oxidation mechanism; in the zone whose distance to the nozzle is more than 55 mm, diffusion oxidation is the principal mechanism. Besides the in-flight oxidation, the oxidation after spraying also occurs for the particles. In-flight oxidation is the main oxidation mechanism for NiCrCoAlY particles in plasma spraying. Shrouding gas can decrease the oxide content of in-flight oxidation and increase the oxidation resistance of NiCrCoAlY coatings.
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RARE METAL MATERIALS AND ENGINEERING
ISSN： 1002-185X
Year： 2010
Issue： 12
Volume： 39
Page： 2137-2141
0 . 7 0 0
JCR@2022
ESI Discipline： MATERIALS SCIENCE;
JCR Journal Grade：4
CAS Journal Grade：4
Cited Count：
WoS CC Cited Count： 1
SCOPUS Cited Count：
ESI Highly Cited Papers on the List： 0 Unfold All
WanFang Cited Count：
Chinese Cited Count：
30 Days PV： 5
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