High-temperature oxidation of Fe-Cr alloys in air

被引：0
|
作者：
O. Yu. Goncharov
O. M. Kanunnikova
机构：
[1] Russian Academy of Sciences,Physicotechnical Institute, Ural Division
来源：
Inorganic Materials | 2007年 / 43卷
关键词：
Internal Oxidation; Chromium Oxide; Boron Oxide; Scale Layer; Chromium Nitrides;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The scales formed on the Fe-Cr (19, 29.5, and 46.8 at % Cr) and Fe70Cr15B15 alloys in the initial stages of oxidation in air at 1470 K have been analyzed using depth profiling. The results demonstrate that the Cr/(Fe + Cr) ratio in the scales on the Fe-Cr alloys is close to 30 at %, independent of the bulk chromium concentration. The top scale layers on the Fe-Cr alloys consist predominantly of M2O3 (M = Cr, Fe) solid solutions and CrO2, the intermediate layers are composed of (Fe, Cr)3O4 and FeO, and the internal oxidation and nitridation layers consist of chromium oxides and nitrides. The top scale layers on the oxidized Fe70Cr15B15 alloy contain, in addition, boron oxides, and the internal nitridation product is BN instead of chromium nitrides.
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页码：515 / 519
页数：4
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