Low Pressure Plasma Coatings (LPPS), also known as Vacuum Plasma Spraying (VPS), is the process of applying plasma
Low Pressure Plasma Coatings (LPPS), also known as Vacuum Plasma Spraying (VPS), is the process of applying plasma spray coatings in a low pressure argon atmosphere chamber. These coatings are well suited for bond coats on advanced thermal barrier coatings and thick, oxidation resistant, clearance control coatings for high-pressure turbine seals. They include an almost complete absence of pores or oxide inclusions and an applicable thickness of up to 0.35 mm.
Elcoat 2086 is a nickel base LPPS overlay coating of the MCrAIY type. Elcoat 2185 is a cobalt base MCrAIY composition. Next to nickel and/or cobalt, both coating compositions have high percentages of chromium and aluminum. The element yttrium is generally known for its beneficial effect on the oxidation resistance.
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