Paper Title:
Compositional Factors Affecting the Oxidation Behavior of Pt-Modified γ-Ni+γ’-Ni3Al-Based Alloys and Coatings
  Abstract

Many high-temperature coatings rely on the formation of a continuous and adherent thermally grown oxide (TGO) scale of α-Al2O3 for extended resistance to degradation. For instance, the durability and reliability of thermal barrier coating (TBC) systems in gas turbines are critically linked to the oxidation behavior and stability of an alumina-forming β-NiAl-based bond coat. This study focuses primarily on the development of unique Pt+Hf-modified γ′-Ni3Al+γ-Ni coating compositions that form highly adherent, slow-growing TGO scales during both isothermal and cyclic oxidation at high temperature. Recent findings on the isothermal and cyclic oxidation behavior of γ′+γ alloys and coatings will be discussed, with particular emphasis on the effects of Pt, Al and Hf contents and distributions. Inferred reasons for the observed “Pt effect” will also be presented.

  Info
Periodical
Materials Science Forum (Volumes 595-598)
Edited by
Pierre Steinmetz, Ian G. Wright, Alain Galerie, Daniel Monceau and Stéphane Mathieu
Pages
239-247
DOI
10.4028/www.scientific.net/MSF.595-598.239
Citation
N. Mu, T. Izumi, L. Zhang, B. Gleeson, "Compositional Factors Affecting the Oxidation Behavior of Pt-Modified γ-Ni+γ’-Ni3Al-Based Alloys and Coatings", Materials Science Forum, Vols. 595-598, pp. 239-247, 2008
Online since
September 2008
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: X.J. Zhang, Yan Niu
Abstract:Small amounts of silver have been added to the intermetallic compound β-NiAl for the purpose of improving its mechanical properties. Four...
775
Authors: Eric Cavaletti, Sebastien Mercier, Denis Boivin, Marie Pierre Bacos, Pierre Josso, Daniel Monceau
Abstract:A diffusion barrier based on a NiW electrolytic coating has been developed to limit interdiffusion between a Ni-base superalloy (MCNG) and a...
23
Authors: Jerzy Jedlinski, Zbigniew Żurek, Martah Homa, G. Smoła, J. Camra
Abstract:The oxidation mechanism of FeCrAl (+RE), RE: reactive elements: Y and Hf) thin foils was studied at temperatures ranging from 1093 K to 1173...
541
Authors: Biao Zhou, Feng Jin, Qun Luo, Qian Li, Kuo Chih Chou
Chapter 13: Surface Engineering/Coatings
Abstract:The high temperature oxidation and microstructure evolution of 55%Al-Zn-Si coated sheets were studied by scanning electron microscopy (SEM)...
1998
Authors: Amalia Soare, Ioana Csáki, Cristina Oprea, Sorin Soare, Cristian Predescu, Mirela Sohaciu
Chapter 3: Surface Engineering, Corrosion and Coatings
Abstract:The main objective of this work is the development of new Ru-based Bond Coats (BC) as part of Thermal Barrier Coating Systems (TBC).So far,...
229