Low-Cost Protective Layer Coatings on Thermal Barrier Coatings via CCVD. Final Report

Hendrick, Michelle

MicroCoating Technologies, Inc. (United States)

关键词: Combustion;    Sintering;    Testing;    X-Ray Diffraction;    Oxygen;   

DOI  :  10.2172/821712
RP-ID  :  DOE/ER/83500-1
RP-ID  :  FG02-02ER83500
RP-ID  :  821712

美国|英语

来源: UNT Digital Library

【 摘 要 】

MicroCoating Technologies, Inc., investigated the use of the Combustion Chemical Vapor Deposition (CCVD) process to deposit oxygen or sintering barrier coatings for thermal barrier coating (TBC) applications. In addition, it looked at the use of its nanopowders by the NanoSpray process for developing smoothing layers on TBCs. Testing and analysis of coated substrates included heat treatments, scanning electron microscopy, x-ray diffraction and profilometry. Coatings on TBC-coated superalloy coupons were tested by an outside collaborator. Results from the investigations indicated that the thin film coatings were not well-suited as barrier layers on the rough bond coat or TBC. Subsequent investigations considered smoothing layers on the TBC, as suggested by the collaborator, using nanopowder-based coatings. Smoothing of substrate surfaces by 50% was observed by profilometry.