High temperature reactivity of nickel aluminide diffusion coatings

被引：25
作者：
Choux, C. [1 ]
Kulinska, A. J. [1 ,2 ]
Chevalier, S. [1 ]
机构：
[1] Univ Bourgogne, CNRS, Inst Carnot Bourgogne, UMR 5209, F-21078 Dijon, France
[2] AGH Univ Sci & Technol, Fac Mat Sci & Ceram, Dept Solid State Chem, PL-30059 Krakow, Poland
来源：
INTERMETALLICS | 2008年 / 16卷 / 01期
关键词：
aluminides; miscellaneous; oxidation; coatings; intermetallic and otherwise; vapour deposition (physical and chemical); secondary ion mass spectrometry;
D O I：
10.1016/j.intermet.2007.07.014
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The high-temperature oxidation behaviour of nickel aluminides has been studied at 900 degrees C in air under atmospheric pressure. Yttria doped and undoped specimens of nickel were aluminised and then oxidised for 100 h under isothermal and cycling conditions. The results showed that when yttria is added by metal-organic chemical vapour deposition technique prior to the aluminisation process, it increased the oxidation rate of aluminised nickel, but improved the oxide scale adherence under cyclic conditions. The effects of yttria on the scale morphology, oxidation behaviour and scale spallation tendency are discussed based on the experimental results, using X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray analyses (EDX). (c) 2007 Elsevier Ltd. All rights reserved.
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页码：1 / 9
页数：9
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