NI-BASED SUPERALLOY MEMBER HAVING HEAT-RESISTANT BOND COAT LAYER FORMED THEREIN

Title:

NI-BASED SUPERALLOY MEMBER HAVING HEAT-RESISTANT BOND COAT LAYER FORMED THEREIN

Document Type and Number:

WIPO Patent Application WO/2012/053517

Kind Code:

A1

Abstract:

A Ni-based superalloy member having a three-layered structure composed of an Ni-based superalloy base, a bond coat layer and a top coat layer, wherein the bond coat layer is composed of an alloy comprising 15.0 mass% or less of Co, 0.1-7.5 mass% inclusive of Cr, 3.0 mass% or less of Mo, 4.1-10.0 mass% inclusive of W, 6.0-10.0 mass% inclusive of Al, 2.0 mass% or less of Ti, 5.0-15.0 mass% inclusive of Ta, 1.5 mass% or less of Hf, 1.0 mass% or less of Y, 2.0 mass% or less of Nb, 2.0 mass% or less of Si, and a remainder made up by Ni and unavoidable impurities. The Ni-based superalloy member having the bond coat layer formed therein has excellent environmental resistance properties including oxidation resistance and high-temperature corrosion resistance, particularly has an excellent thermal cycle life, and is therefore suitable as a turbine blade.

Inventors:

KAWAGISHI KYOKO (JP)
MATSUMOTO KAZUHIDE (JP)
HARADA HIROSHI (JP)

Application Number:

PCT/JP2011/073949

Publication Date:

April 26, 2012

Filing Date:

October 18, 2011

Export Citation:

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Assignee:

NAT INST FOR MATERIALS SCIENCE (JP)
KAWAGISHI KYOKO (JP)
MATSUMOTO KAZUHIDE (JP)
HARADA HIROSHI (JP)

International Classes:

C23C4/08; C22C19/05; C23C4/10; F01D5/28; F01D25/00; F02C7/00

Domestic Patent References:

WO2008032806A1

2008-03-20

Foreign References:

JPH05132751A	1993-05-28
JPH09272987A	1997-10-21
JP4111555B2	2008-07-02
JP2008156744A	2008-07-10
JP2002155380A	2002-05-31
JP3862774B2	2006-12-27
JPS6230037A	1987-02-09
JPH05132751A	1993-05-28

Other References: