Modelling of phase distributions in MCrAlY coatings and their interactions with nickel based alloys

被引：15

作者：

Achar, DRG ^{[1
]}

Munoz-Arroyo, R ^{[1
]}

Singheiser, L ^{[1
]}

Quadakkers, WJ ^{[1
]}

机构：

[1] Forschungszentrum Julich, Inst Mat & Proc Energy Syst, D-52425 Julich, Germany

来源：

JOURNAL DE PHYSIQUE IV | 2004年 / 120卷

关键词：

D O I：

10.1051/jp4:2004120027

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

At high operating temperatures the oxidation resistant MCrAlY (M=Ni, Co) coatings and the substrate alloys are highly susceptible to phase changes, particularly, after long hours of exposure, With the advent of computational modelling involving metallurgical thermodynamics and diffusion parameters in recent times, it is now possible to follow these phase changes and interdiffusion processes through simulation. In the present work, phase changes in the temperature range between 950 and 1050 degreesC in the MCrAlY coating materials containing additions of Cobalt and Rhenium have been determined through Such an approach. Further, using a diffusion simulation software interdiffusion between a commercial NiCoCrAlY coating and a Nickel-base superalloy substrate material at 1000 degreesC has been simulated. The simulated results have been compared with the experimental findings and they are found to be in reasonable agreement with each other. Some deviations observed are discussed in the light of limited availability of thermodynamic and kinetic data.

引用

页码：231 / 238

页数：8

共 14 条

[1]

Andersson J.O., 1990, Fundamentals and Applications of Ternary Diffusion, P153

[2]

Broz P, 2002, MAT SCI ENG A-STRUCT, V324, P28, DOI 10.1016/S0921-5093(01)01278-3

[3] Theoretical and experimental study of the influence of Cr on the γ+γ′ phase field boundary in the Ni-Al-Cr system [J].

Broz, P ;

Svoboda, M ;

Bursík, J ;

Kroupa, A ;

Havránková, J .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2002, 325 (1-2) :59-65

[4]

DAYANANDA MA, 1989, MAT SCI ENG A-STRUCT, V121, P351

[5] Computer simulations of Ni-Cr-Al multiphase diffusion couples [J].

Engstrom, A ;

Morral, JE ;

Agren, J .

ACTA MATERIALIA, 1997, 45 (03) :1189-1199

[6] COMPUTER-SIMULATION OF DIFFUSION IN MULTIPHASE SYSTEMS [J].

ENGSTROM, A ;

HOGLUND, L ;

AGREN, J .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1994, 25 (06) :1127-1134

[7]

JANSSON B, 1993, COMPUTER SOFTWARE IN CHEMICAL AND EXTRACTIVE METALLURGY, P57

[8]

MUNOZARROYO R, 2003, THESIS U MADRID

[9]

QUADAKKERS WJ, 1997, P EUROMAT 97 MAASTR, P1

[10]

SAUNDERS N, 2000, NI DATA INFORMATION

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