NDLI: Vacuum plasma coatings for turbine blades

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Vacuum plasma coatings for turbine blades

Content Provider	NASA Technical Reports Server (NTRS)
Author	Holmes, R. R.
Copyright Year	1985
Description	Turbine blades, vacuum plasma spray coated with NiCrAlY, CoCrAlY or NiCrAlY/Cr2O3, were evaluated and rated superior to standard space shuttle main engine (SSME) coated blades. Ratings were based primarily on 25 thermal cycles in the MSFC Burner Rig Tester, cycling between 1700 F (gaseous H2) and -423 F (liquid H2). These tests showed no spalling on blades with improved vacuum plasma coatings, while standard blades spalled. Thermal barrier coatings of ZrO2, while superior to standard coatings, lacked the overall performance desired. Fatigue and tensile specimens, machined from MAR-M-246(Hf) test bars identical to the blades were vacuum plasma spray coated, diffusion bond treated, and tested to qualify the vacuum plasma spray process for flight hardware testing and application. While NiCrAlY/Cr2O3 offers significant improvement over standard coatings in durability and thermal protection, studies continue with an objective to develop coatings offering even greater improvements.
File Size	1199078
Page Count	17
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19850018558
Archival Resource Key	ark:/13960/t3nw4bm1p
Language	English
Publisher Date	1985-04-01
Access Restriction	Open
Subject Keyword	Nonmetallic Materials Metal Coatings Sprayed Coatings Thermal Control Coatings Turbine Blades Nickel Alloys Space Shuttle Main Engine Yttrium Alloys Thermal Cycling Tests Plasma Spraying Chromium Alloys Engine Parts Vacuum Deposition Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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