Transient oxidation of Al-deposited Fe-Cr-Al alloy foil

被引：5

作者：

Andoh, A

Taniguchi, S

Shibata, T

机构：

[1] Nisshin Steel Co LTD, Steel & Technol Dev Lab, Osaka 592, Japan

[2] Osaka Univ, Fac Engn, Dept Mat Sci & Proc, Osaka 565, Japan

来源：

HIGH TEMPERATURE CORROSION AND PROTECTION OF MATERIALS 4, PTS 1 AND 2 | 1997年 / 251-2卷

关键词：

Al deposition; Fe-Cr-Al alloy foil; Al2O3; scales; BEHAVIOR;

D O I：

10.4028/www.scientific.net/MSF.251-254.785

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The oxide phases formed on an Al-deposited Fe-Cr-Al alloy foil and an Fe-Cr-Al alloy foil of the same levels of Al and (La+Ce) contents, and their oxidation kinetics have been studied in air at 1173 and 1373 K using TGA, XRD and SEM. Al deposition promotes the growth of metastable aluminas (theta-Al2O3, gamma-Al2O3). Scales consisting of theta-Al2O3 and a small amount of alpha-Al2O3 develop on the Al-deposited foil at 1173 K and exhibit the whisker-type morphology. In the early stage of oxidation at 1373K, thick scales consisting of theta-Al2O3 and alpha-Al2O3 grow rapidly on the Al-deposited foil. The transformation from theta-Al2O3 to alpha-Al2O3 is very fast, and the scales result in only alpha-Al2O3. In contrast, alpha-Al2O3 scales containing a minor amount of FeAl2O4 develop on the alloy foil. The growth rate of alpha-Al2O3 scales on the Al-deposited foil is smaller than that on the alloy foil and very close to that on NiAl at 1373 K.

引用

页码：785 / 792

页数：8

共 13 条

[1]

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