THE OXIDATION BEHAVIOR OF NIAL .1. PHASE-TRANSFORMATIONS IN THE ALUMINA SCALE DURING OXIDATION OF NIAL AND NIAL-CR ALLOYS

被引：595
|
作者：
BRUMM, MW
GRABKE, HJ
机构：
[1] Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf
来源：
CORROSION SCIENCE | 1992年 / 33卷 / 11期
关键词：
D O I：
10.1016/0010-938X(92)90002-K
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The oxide phases formed on NiAl and NiAl-Cr and their oxidation kinetics have been studied in the temperature range 973-1673 K using TGA, XRD, SEM and TEM. The oxidation rate depends on the oxide phase formed on the alloy. Gamma-Al2O3, theta-Al2O3, and alpha-Al2O3 have been observed and different k(p) values were correlated to their growth. Cr in NiAl accelerates the theta-alpha transformation and leads to a higher k(p) value. Cr2O3 formed in the initial stage of oxidation acts as nuclei for the formation of alpha-Al2O3.
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页码：1677 / &
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