Extend CoCrAlY and Pt Sputter-Deposition Technology to Provide Coatings on FT4 Turbine Vanes for at-Sea Evaluation.

reportActive / Technical Report | Accession Number: ADA046761 | Open PDF

Abstract:

The application of high-rate dc triode sputtering technology to the deposition of CoCrAlY alloy and Pt coatings on first-stage FT4 and LM-2500 blades and FT4 vanes for sulfidation protection in marine gas turbines is described. The CoCrAlY coatings were approximately 0.005 inch thick and were applied directly to superalloy blades and vanes and to burner rig test pins. In addition, a approximately equal to 0.0002 inch thick layer of Pt was sputter deposited both as an overlayer on the CoCrAlY and as an interlayer between the superalloy airfoil andor test pin and the CoCrAlY. The Pt coatings were applied on both sputter-deposited CoCrAlY and electron beam evaporated CoCrAlY. Features of the sputter-deposition technology applied are discussed. Microstructural, chemical composition, and thickness distribution results are presented. FT4 vanes coated with CoCrAlY of two Al contents and Pt were delivered to the Navy for at-sea testing. Author

Author(s):
Patten, J. W. ; Moss, R. W. ; Hays, D. D. ; Mcclanahan, E. D. ; Lundgren, R. A.
Author Organization(s):
BATTELLE PACIFIC NORTHWEST LABS RICHLAND WASH
Descriptive Note:
Technical rept. 16 Jan-31 Dec 76,
Pagination:
0032

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Contract/Grant Number(s):
N00024-75-C-4332
 Subject Terms
Joint Capability Areas:
JCA_1.2.7_Experimentation; JCA_5_Command and Control; JCA_5.3_Planning; JCA_3.2_Engagement; JCA_3_Force Application; JCA_3.2.1_Kinetic Means; JCA_6.4.1_Secure Information Exchange
Communities of Interest:
Ground and Sea Platforms
Descriptor(s):
*METAL COATINGS, *DEPOSITION, *GAS TURBINE BLADES, *SPUTTERING, *MARINE ENGINES, *GUIDE VANES, MICROSTRUCTURE, HIGH RATE, ALUMINUM ALLOYS, LAYERS, DIRECT CURRENT, TRIODES, SEA TESTING, COBALT ALLOYS, CHROMIUM ALLOYS, PLATINUM ALLOYS, YTTRIUM ALLOYS
Field(s)/Group(s):
Coatings, Colorants and Finishes, Fabrication Metallurgy, Marine Engineering
Keyword(s):
FT 4 engines
Report Date:
1976 Dec 16