Applying bond coat to engine components using cold spray

(19)

(11)

EP 1 705 266 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	17.01.2007 Bulletin 2007/03

(43)	Date of publication A2:
	27.09.2006 Bulletin 2006/39

(21)	Application number: 06251532.5

(22)	Date of filing: 22.03.2006

(51)

International Patent Classification (IPC):

C23C 24/04^(2006.01)

F01D 5/00^(2006.01)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
	Designated Extension States:
	AL BA HR MK YU

(30)

Priority:

23.03.2005 US 88380

(71)	Applicant: UNITED TECHNOLOGIES CORPORATION
	Hartford Connecticut 06101 (US)

(72)	Inventors:
	DeBiccari, Andrew North Branford, CT 06471 (US) Freling, Melvin West Hartford, CT 06117 (US) Haynes, Jeffrey D. Stuart, FL 33496 (US)

(74)	Representative: Leckey, David Herbert
	Frank B. Dehn & Co. St Bride's House 10 Salisbury Square London EC4Y 8JD London EC4Y 8JD (GB)

(54)	Applying bond coat to engine components using cold spray

(57) A process for applying a coating to a component (10) used in an engine is provided. The process includes the steps of providing a component (10) with at least one surface (24) to be coated, and depositing at least one layer of powder coating material onto the at least one surface (10) using a non-oxidizing carrier gas so that the powder coating material plastically deforms without melting and bonds to the at least one surface upon impact with the at least one surface. The process of the present invention has particular utility in applying bond coats to airfoil portions of turbine blades or vanes and to applying bond coats to combustion chamber liners.

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