中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
Vol. 11 No. 4 August 2001 |
NiCoCrAlYTa coatings for gas turbine engine
(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