Oxidation of single crystal PWA 1483 at 950 °C in flowing air

被引：70
作者：
Pfennig, A. [1 ]
Fedelich, B. [2 ]
机构：
[1] FHTW Univ Appl Sci Berlin, D-10318 Berlin, Germany
[2] BAM Fed Inst Mat Res & Testing, D-12205 Berlin, Germany
来源：
CORROSION SCIENCE | 2008年 / 50卷 / 09期
关键词：
Superalloys; Weight loss; Oxidation; High temperature corrosion; Kinetic parameters;
D O I：
10.1016/j.corsci.2008.06.033
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The oxidation behaviour of single crystal PWA 1483 at 950 degrees C was investigated by means of XRD, SEM and EDS. The Parabolic oxidation behaviour, as defined by mass gain and the respective oxide layer thicknesses, is characterized by a parabolic rate constant of about 4 x 10(-6) mg(2)/(cm(4) x s) and the formation of a multi-layered oxide scale. An outer scale contains a Ti-bearing thin film composed of TiO2 and NiTiO3 but mostly Cr in Cr2O3 and (Ni/Co)Cr2O4 besides NiTaO4. This outer scale is connected to a discontinuous layer of Al2O3 and an area of gamma'-depletion within the base material. (c) 2008 Elsevier Ltd. All rights reserved.
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页码：2484 / 2492
页数：9
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