研究了Mn-Cr-O和Mn-Al-O尖晶石的碳化行为，探索不同金属元素计量比对碳化行为的影响。研究表明，当Mn过量时Mn-Cr-O尖晶石可以保持尖晶石结构，但是当Cr过量时则出现Cr2O3第二相。Mn-Al-O尖晶石中MnO和Al2O3的溶解度都很小，无论Mn还是Al过量都会产生第二相氧化物。Mn-Cr-O和Mn-Al-O 尖晶石在碳化气氛下都会发生明显的碳化。成分对尖晶石的抗碳化能力有明显影响，偏离化学计量比会造成抗碳化能力的降低。相对而言Mn-Al-O尖晶石具有更强的抗碳化能力。
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.
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