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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 11    No. 4    August 2001

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Preparation and characterization of LPPS
NiCoCrAlYTa coatings for gas turbine engine
HONG Rui-jiang(洪瑞江), ZHOU Ke-song(周克崧),
WANG De-zheng(王德政), ZHU Hui-zhao(朱晖朝), KUANG Zi-qi(邝子奇)

Guangzhou Research Institute of Non ferrous Metals,
Guangzhou 510651, P.R.China

Abstract:NiCoCrAlYTa coatings have been deposited onto an aircraft gas turbine engine blade using a LPPS unit equipped with a computerized robot. Optimal processing conditions, including spray parameters, the trajectory of the robot, and the synchronized movements between the torch and the blade, have been developed for superior coating properties. Transferred-arc treatment, providing a preheating and a cleaning of the substrate surface, enhances the adherence of the coatings to the substrate. The resulting LPPS coatings show dense and uniform characteristics with ideal hardness, and good corrosion resistance to cycle oxidation.

 

Key words: low pressure plasma spraying; hot corrosion; coating; gas turbine engine; MCrAlY

ISSN 1672-7029
CN 43-1423/U

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