Mechanistic aspects of Pt-modified beta-NiAl alloy oxidation

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	Mechanistic aspects of Pt-modified beta-NiAl alloy oxidation
	G. Smola; W. Wang; J. Jedlinski; B. Gleeson; K. Kowalski; A. Bernasik; M. Nocun
	2009
发表期刊	Materials at High Temperatures
ISSN	0960-3409
卷号	26 期号:3 页码:273-280
摘要	The effects of Pt addition (5, 10 and 15 at.%) on the high temperature oxidation behaviour of the intermetallic compound beta-NiAl were studied at 1150 degrees C under both isothermal and thermal cycling conditions. The scale growth mechanism was assessed using two-stage oxidation exposures with (18)O(2) as a tracer in conjunction with high-resolution secondary ion mass spectrometer analysis of isotopic distributions. The scale morphologies were further characterized using secondary electron microscopy, Pt was found to reduce slightly the scale growth rate and improve considerably its resistance to spallation but it did not affect the sequence of scale development. Instead, it slowed the rate at which the scale developed. The alpha-Al(2)O(3) scales that were eventually established were duplex in structure, consisting of a compact inner layer and a thinner outer layer. This outer layer consisted of ridges and grew by the coarsening of these and/or by a dislocation climb mechanism.
部门归属	[smola, grzegorz; jedlinski, jerzy; nocun, m.] agh univ sci & technol, surface engn & anal lab, fac mat sci & ceram, pl-30059 krakow, poland. [wang, wen] chinese acad sci, inst met res, shenyang 110016, peoples r china. [gleeson, brian] univ pittsburgh, dept mech engn & mat sci, pittsburgh, pa 15261 usa. [kowalski, k.] agh univ sci & technol, fac met engn & ind comp sci, pl-30059 krakow, poland. [bernasik, a.] agh univ sci & technol, fac phys & appl comp sci, pl-30059 krakow, poland.;smola, g (reprint author), agh univ sci & technol, surface engn & anal lab, fac mat sci & ceram, ul reymonta 23, pl-30059 krakow, poland;jedlinsk@uci.agh.edu.pl
关键词	Alumina Formers Beta-nial Oxidation Kinetics Thermal Shocks Two-stage Oxidation Secondary Ion Mass Spectrometry Secondary Electron Microscopy Thermal Barrier Coatings Alumina Scales Oxide Scales Bond Coats Behavior Stress
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WOS记录号	WOS:000269737100007
引用统计	被引频次：14[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32284
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	G. Smola,W. Wang,J. Jedlinski,et al. Mechanistic aspects of Pt-modified beta-NiAl alloy oxidation[J]. Materials at High Temperatures,2009,26(3):273-280.
APA	G. Smola.,W. Wang.,J. Jedlinski.,B. Gleeson.,K. Kowalski.,...&M. Nocun.(2009).Mechanistic aspects of Pt-modified beta-NiAl alloy oxidation.Materials at High Temperatures,26(3),273-280.
MLA	G. Smola,et al."Mechanistic aspects of Pt-modified beta-NiAl alloy oxidation".Materials at High Temperatures 26.3(2009):273-280.