High temperature oxidation of Ni70Cr30 alloy:: Determination of oxidation kinetics and stress evolution in chromia layers by Raman spectroscopy

被引：47

作者：

Kemdehoundja, M. ^{[1
]}

Dinhut, J. F. ^{[1
]}

Grosseau-Poussard, J. L. ^{[1
]}

Jeannin, M. ^{[1
]}

机构：

[1] Univ La Rochelle, EA 317, LEMMA, F-17042 La Rochelle 01, France

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2006年 / 435卷

关键词：

high temperature oxidation; NiCr alloy; chromia; residual stress; stress relaxation; Raman spectroscopy;

D O I：

10.1016/j.msea.2006.07.083

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this work, the oxidation of Ni70Cr30 alloy has been produced at a temperature of 900 degrees C in air. The parabolic behaviour of oxidation was established ex situ and the corresponding kinetic constant was deduced. Microscopic observations have shown that chromia grain size does not exceed 1 mu m. Raman spectroscopy was used to determine stresses in chromia (Cr2O3) layers. Stresses are found to be compressive and increase with the chromia thickness before reaching a "plateau" at -2.9 GPa. The stress relaxation phenomenon discussed here takes into account theoretical modelling that can be found in literature. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：666 / 671

页数：6

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