On the Competitive Growth of Alpha and Transient Aluminas During the First Stages of Thermal Oxidation of FeCrAl Alloys at Intermediate Temperatures

被引：24

作者：

Chegroune, Redouane ^{[1
,2
]}

Salhi, Essaid ^{[2
]}

Crisci, Alexandre ^{[1
]}

Wouters, Yves ^{[1
]}

Galerie, Alain ^{[1
]}

机构：

[1] SIMaP, Inst Polytechn Grenoble, F-38402 St Martin Dheres, France

[2] Ecole Natl Polytech Alger, Algiers 16200, Algeria

来源：

OXIDATION OF METALS | 2008年 / 70卷 / 5-6期

关键词：

D O I：

10.1007/s11085-008-9126-x

中图分类号：

TF [冶金工业];

学科分类号：

0806 [冶金工程];

摘要：

An oxide film formed during the initial stages of FeCrAl oxidation in the temperature range of transient-scale formation was characterized. Oxidation tests were performed on Aluchrom YHfAI, a grade from Thyssen Krupp VDM. Alloy foil thickness was 50μm and sample dimensions were kept at 15 × 30 mm 2. Oxidation kinetics were recorded in a SETARAM microbalance, under flowing Ar + 15% O 2 between 875 and 970°C. Gravimetric measurements showed the non-monotonic behavior of FeCrAl oxidation as a function of temperature, a classical observation due to the competition between more or less protective alumina phases. The curves also confirmed the sudden change in oxidation kinetics after a few hours of oxidation. The results of XRD spectra showed that the ratio of transient-to-alpha peak amplitudes was zero at 30 minutes after the beginning of oxidation, a time where only z-alumina was detected.

引用

页码：331 / 337

页数：7

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