Microstructural characterization of the protective oxide scale forming on Ni-25Cr-xMn (x=0.5, 1 and 1.5% wt) in a 200 Pa O2 environment at 1050 °C

SCRIPTA MATERIALIA

卷:178

Article

Perez, T.¹  Ghanbaja, J.¹  Mathieu, S.¹  Latu-Romain, L.²  Vilasi, M.²  Wouters, Y.² 

[1] Univ Lorraine, CNRS, IJL, F-54000 Nancy, France

[2] Univ Grenoble Alpes, CNRS, SIMaP, F-38000 Grenoble, France

关键词: Oxidation;    Nickel alloys;    Spinel;    Microstructure;    High-resolution electron microscopy (HREM);   

DOI  :  10.1016/j.scriptamat.2019.11.030

来源: Elsevier

【 摘 要 】

To clarify the influence of manganese on the oxidation behavior of Ni-Cr alloys, high resolution transmission electron microscopy was used to examine the microstructure and chemistry of oxide scales forming at 1050 degrees C on Ni-25Cr-xMn (x = 0.5, 1 and 1.5% wt) in 200 Pa O-2. The scales consisted of two layers of chromia and one layer of spinel Mn1+xCr2-xO4. The internal layer exhibited an equiaxed grain structure, whereas columnar grains developed in the outer layer. The results demonstrated that the spinel composition at the chromia-spinel interface was similar regardless of the manganese concentration. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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