Analytical study of the evolution of alumina scales formed on an ODS alloy

被引：8

作者：

Maréchal, L ^{[1
]}

Lesage, B

Huntz, AM

Molins, R

机构：

[1] Univ Paris 11, LEMHE, CNRS, UMR 8647, F-91405 Orsay, France

[2] ENSMP, Ctr Mat, CNRS, UMR 7633, F-91003 Evry, France

来源：

MATERIALS AT HIGH TEMPERATURES | 2003年 / 20卷 / 03期

关键词：

alumina scales; oxide dispersion strengthened alloys;

D O I：

10.3184/096034003782748793

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An original deflection technique, in association with TEM observations, allowed study of the transformation of metastable alumina phases to a phase. This transformation is mainly characterised by a 14% volume decrease. Deflection experiments were performed on PM 2000 after pre-oxidation, in order to create a 3 mum alumina scale, and subsequent mechanical oxide removal of one large sample face. This technique allowed evaluation of the kinetics of transformation. The microstructural and chemical evolutions of the oxide, the interface (morphology, segregation) and the alloy (aluminium depletion, oxide dispersion) were characterised using TEM analyses and thermogravimetric measurements were done in the same conditions as the deflection tests to determine the oxidation rate constants.

引用

页码：295 / 301

页数：7

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