Development of a NiW in-situ diffusion barrier on a fourth generation nickel-base superalloy

被引：8

作者：

Cavaletti, E. ^{[1
]}

Mercier, S. ^{[1
]}

Boivin, D. ^{[1
]}

Bacos, M. -P. ^{[1
]}

Josso, P. ^{[1
]}

Monceau, D. ^{[2
]}

机构：

[1] Off Natl Etud & Rech Aerosp, Met Mat & Proc Dept, F-92322 Chatillon, France

[2] ENSIACET, CIRIMAT CNRS, UPS, INPT, F-31077 Toulouse, France

来源：

HIGH TEMPERATURE CORROSION AND PROTECTION OF MATERIALS 7, PTS 1 AND 2 | 2008年 / 595-598卷

关键词：

Thermal barrier system; diffusion barrier; secondary reaction zone; bondcoating; diffusion; electrolytic coating; ALLOYS; COATINGS; SCALE;

D O I：

10.4028/www.scientific.net/MSF.595-598.23

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A diffusion barrier based on a NiW electrolytic coating has been developed to limit interdiffusion between a Ni-base superalloy (MCNG) and a beta-NiAl bondcoating. Isothermal oxidation tests of 50h at 1100 degrees C confirmed that W-rich layer formed with NiW coating modifies the oxidation behaviour of the bondcoat and lit-nits interdiffusion. The diffusion barrier reduced beta-NiAl -> gamma'-Ni(3)Al transformation in the bondcoating and prevented SRZ formation.

引用

页码：23 / 32

页数：10

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