Life Prediction of High-Temperature MCrAlY Coatings Based on Microstructural Observations

Robert Eriksson; Kang Yuan; Sten Johansson; Ru Lin Peng; Xin Hai Li

doi:10.4028/www.scientific.net/AMR.922.143

Paper Titles

Hall-Petch Relationship in an Al-Mg-Sc Alloy Subjected to ECAP
p.120

In Situ Synchrotron Diffraction Studies on Hot Deformation of Austenite in a High Strength Quenched and Tempered Structural Steel
p.126

Electrothermomechanical Processing of High Carbon Steels
p.132

Effect of Zr Addition on Martensitic Transformation in TiMoSn Alloy
p.137

Life Prediction of High-Temperature MCrAlY Coatings Based on Microstructural Observations
p.143

Occurrence of Dynamic Alpha-Phase Nucleation in Ti-5553 during Hot Deformation
p.149

Evolution of Laves-Phase Particles in a Low Carbon 9%Cr Martensitic Steel during Creep at 650°C
p.155

Embrittlement of Steels by Liquid Zinc: Crack Propagation after Grain Boundary Wetting
p.161

X-Ray Residual Stress Analysis of Stainless Steel Using cosα Method
p.167

HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 922Life Prediction of High-Temperature MCrAlY...

Life Prediction of High-Temperature MCrAlY Coatings Based on Microstructural Observations

Abstract:

Thermal barrier coatings are commonly used in gas turbines for protection against high tem-perature and oxidation. Life prediction of oxidation protective coatingsmay be done bymicrostructure-based techniques such as -depletion based life criteria. In this study, a thermal barrier coating sys-tem, with an overlay NiCoCrAlY coating as bond coat, was oxidised up to 10000 h at 900 C. Themicrostructure was studied and related to Al depletion. It was found that a -depletion based lifecriterion could not be used for the studied coating composition and temperature as it would be tooconservative. A 0-depletion based model was instead suggested and supported by interdiffusion sim-ulation.

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Periodical:

Advanced Materials Research (Volume 922)

Pages:

143-148

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.922.143

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Online since:

May 2014

Authors:

Robert Eriksson*, Kang Yuan, Sten Johansson, Ru Lin Peng, Xin Hai Li

Keywords:

MCrAlY, Al Depletion, Life Prediction, Microstructure, TBC, Thermal Barrier Coating (TBC)

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