NiCrAlYSi-BaF2/CaF2-Polyester material was developed for abradable seal of high-pressure compressor in gas turbine. The NiCrAlYSi-BaF2/CaF2-Polyester coatings were deposited on Ni-based superalloy substrates with an air plasma spray system. Friction and wear properties of the coatings were investigated in view of friction coefficient and wear morphologies of the coatings. The morphologies of the coatings were evaluated by field emission scanning electron microscopy. The results showed that NiCrAlYSi-7%BaF2/CaF2-10%Polyester coating exhibits lower macrohardness, lower friction coefficient and excellent abradability.

air plasma spraying, barium fluoride-polyester coating, calcium fluoride-polyester coating, field emission scanning electron microscopy, friction properties, nickel-chromium-aluminum-yttrium-silicon coating, tribological properties, wear properties
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2017
DVS Media GmbH
Topics
Nickel-chromium alloys Plasma spray coating Scanning electron microscopy Friction and wear properties
Issue Section:
Aerospace and Power Generation Applications
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