CARBURIZATION BEHAVIORS OF Mn-Cr-O AND Mn-Al-O SPINELS

J Chin Soc Corr Pro

2011, Vol. 31

Issue (1): 18-22 DOI:

Research Articles

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CARBURIZATION BEHAVIORS OF Mn-Cr-O AND Mn-Al-O SPINELS

YUAN Bifei¹, ZHENG Yanjun¹, JING Dong¹, CUI Lishan¹, LU Guiwu²

1. Department of Materials Science and Engineering, China University of Petroleum (Beijing), Beijing 102249
2. Department of Physics, China University of Petroleum (Beijing), Beijing 102249

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Abstract The carburization behaviors of Mn-Cr-O and Mn-Al-O spinels were studied in this paper. Metal stoichiometric ratio was found to have significant effect on the carburization behaviors. A higher amount of Mn than the stoichiometric ratio keeps the spinel structure stable, however a higher amount of Cr than the stoichiometric ratio induces the appearance of secondary Cr₂O₃ phase. In Mn-Al-O system, both MnO and Al₂O₃ have little solubility and excess Mn or Al induces the appearance of secondary phase. In carburization atmosphere both Mn-Cr-O and Mn-Al-O spinel were carburized. It is found when the chemical composition deviates the stoichiometric ratio the carburization resistance ability decreases. Mn-Al-O shows a better carburization resistance than Mn-Cr-O.

Key words: spinel carburization MnCr₂O₄,MnAl₂O₄ coking

Received: 26 July 2010

ZTFLH:

TG174.451

Corresponding Authors: YUAN Bifei E-mail: yuanbifei@gmail.com

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YUAN Bifei, ZHENG Yanjun, JING Dong, CUI Lishan, LU Guiwu. CARBURIZATION BEHAVIORS OF Mn-Cr-O AND Mn-Al-O SPINELS. J Chin Soc Corr Pro, 2011, 31(1): 18-22.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2011/V31/I1/18

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