Coatings for turbine parts

Patent metadata

Field	Value
Publication number	US-2016160354-A1
Application number	US-201615046533-A
Country	US
Kind code	A1
Filing date	Feb 18, 2016
Priority date	Dec 20, 2012
Publication date	Jun 9, 2016
Grant date	—

Abstract

A method and a turbine part having a coating with a matrix layer that includes a high temperature resistant hydrophobic polysiloxane filler, wherein the coating has superior mechanical strength and temperature resistance.

First claim

1 - 10 . (canceled)

11 . A method for coating a part for an axially rotating machine with an erosion resilience and coating, the method comprising:
providing a part of an axially rotating machine; coating the part with a coating comprising a metal matrix with a polysiloxane filler distributed throughout a thickness of the metal matrix; and stoving the part prior to installation of the part in the axially rotating machine so as to change the temperature resistance of the polysiloxane filler.

12 . The method of claim 11 wherein the stoving is performed before the step of coating of the part.

13 . The method of claim 11 wherein the stoving step is performed after the coating step.

14 . The method of claim 11 wherein the method of coating includes electrolytic nickel plating and/or electroless chemical coating.

15 . The method of claim 11 wherein the coating comprises an electrolytic nickel plating.

16 . The method of claim 11 wherein the coating comprises an electroless chemical coating.

17 . The method of claim 11 wherein the coating comprises an outer layer and an inner layer, the inner layer configured to be between the axially rotating machine part and the outer layer.

18 . The method of claim 17 wherein the outer layer has the metal matrix comprising the polysiloxane filler distributed throughout an entire thickness of the outer layer, the filler being the stoved filler that was stoved to change a temperature resistance of the polysiloxane filler.

19 . The method of claim 18 wherein the inner layer is a corrosion resistant layer that does not have any of the polysiloxane filler such that the polysiloxane filler is only within the outer layer of the coating.

20 . The method of claim 19 wherein the filler is stoved such that the polysiloxane filler underwent controlled partial pyrolysis such that the polysiloxane filler includes polymeric hydrophobic filler particles suitable where temperatures exceed 400° C.

21 . The method of claim 11 wherein the polysiloxane filler is stoved such that the polysiloxane filler underwent controlled partial pyrolysis such that the polysiloxane filler includes polymeric hydrophobic filler particles suitable where temperatures exceed 400° C.

22 . The method of claim 11 wherein the polysiloxane filler is catalyst free.

23 . The method of claim 11 wherein the metal matrix comprises Nickel or alloys thereof.

24 . The method of claim 11 wherein the polysiloxane filler has a form of particles.

25 . The method of claim 24 wherein the particles have a size distribution as measured by laser diffraction of d10=0.37 micrometers, D50=1.07 micrometers and D90=2.31 micrometers.

26 . The method of claim 24 wherein the particles are homogenously distributed throughout a thickness of the coating.

27 . The method of claim 11 wherein the polysiloxane filler comprises between 5 volume % to 50 volume % of the coating.

28 . The method of claim 11 wherein the polysiloxane filler comprises between 25 volume % to 45 volume % of the coating or the filler comprises between 35 volume % to 45 volume % of the coating.

Assignees

• Alstom Technology Ltd

Inventors

• Widmer Thomas
• Olliges Sven
• Stankowski Alexander
• Grasso Piero-Daniele
• Melas Mauro
• Baumann Thomas

Classifications

• C09D183/04

  Polysiloxanes · CPC title

• F05D2230/31

  Layer deposition · CPC title

• Y10T428/31663

  As siloxane, silicone or silane · CPC title

• C25D5/50

  by heat-treatment · CPC title

• C25D15/00

  Electrolytic or electrophoretic production of coatings containing embedded materials, e.g. particles, whiskers, wires · CPC title