Strain tolerant corrosion protecting coating and spray method of application

A corrosion resistant coating (64) for gas turbine engine includes a glassy ceramic matrix (63) wherein the glassy matrix is silica-based, and includes a corrosion resistant particulate (65) selected from refractory particles and non-refractory MCrAlX particles, and combinations thereof. The corrosi...

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Bibliographische Detailangaben
Hauptverfasser:	SKOOG, ANDREW J, MURPHY, JANE A, HAZEL, BRIAN THOMAS
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING CHEMICAL SURFACE TREATMENT CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL ENGINE PLANTS IN GENERAL GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METALLURGY NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES STEAM ENGINES SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE WEAPONS
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Beschreibung
Zusammenfassung:	A corrosion resistant coating (64) for gas turbine engine includes a glassy ceramic matrix (63) wherein the glassy matrix is silica-based, and includes a corrosion resistant particulate (65) selected from refractory particles and non-refractory MCrAlX particles, and combinations thereof. The corrosion resistant particles (65) are substantially uniformly distributed within the matrix (63), and provide the coating (64) with corrosion resistance. Importantly the coating (64) of the present invention has a coefficient of thermal expansion (CTE) greater than that of alumina at engine operating temperatures. The CTE of the coating (64) is sufficiently close to the substrate material (60) such that the coating (64) does not spall after frequent engine cycling at temperatures above 1200°F.