Oxidation behaviors of low carbon MgO-C refractories: Roles of Ti2AlC and Ti2AlN,Journal of the American Ceramic Society

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Oxidation behaviors of low carbon MgO-C refractories: Roles of Ti2AlC and Ti2AlN
Journal of the American Ceramic Society ( IF 3.5 ) Pub Date : 2023-03-15 , DOI: 10.1111/jace.19100
Junfeng Chen ₁ , Yifei Du ₁ , Yu Zhang ₁ , Mithun Nath ₁ , Wen Yan ₁ , Yaowu Wei ₁ , Shaowei Zhang ₂ , Nan Li ₁

Affiliation

In this study, Ti₂AlC/Ti₂AlN powders were first incorporated to fabricate low-carbon MgO-C refractories, and their oxidation behaviors were investigated. Computed tomography (CT) results indicated that stress cracks only occurred in the Ti₂AlC-added sample after exposure to 1100°C, and the anomalous oxidation behavior of Ti₂AlC powder at 578°C worsened the oxidation result at 1100°C for MgO-C refractories with Ti₂AlC. At 1500°C, the oxidation behaviors of MgO-Ti₂AlC/Ti₂AlN-C samples revealed a slight mass gain due to the disintegration of Ti₂AlC/Ti₂AlN, and their oxidation resistances increased by 18% as compared to their counterparts. In addition, the role of Ti₂AlC/Ti₂AlN was elucidated. The oxidation process was comprehensive and was mainly determined by the deterioration of carbon and MAX phases. The obtained results indicated that Ti₂AlN was more suitable for fabricating low-carbon MgO-C refractories as compared with Ti₂AlC.

中文翻译：

低碳 MgO-C 耐火材料的氧化行为：Ti2AlC 和 Ti2AlN 的作用

在这项研究中，首先将 Ti ₂ AlC/Ti ₂ AlN 粉末掺入以制造低碳 MgO-C 耐火材料，并研究了它们的氧化行为。_{计算机断层扫描 (CT) 结果表明，在暴露于 1100°C 后，仅在添加 Ti 2} AlC 的样品中出现应力裂纹，并且 Ti ₂ AlC 粉末在 578°C的异常氧化行为使 1100°C 的氧化结果恶化了MgO-C耐火材料与Ti ₂ AlC。_{在 1500°C 时，MgO-Ti 2} AlC/Ti ₂ AlN-C 样品的氧化行为表明，由于 Ti ₂ AlC/Ti _{2的分解，质量略有增加}AlN，与同类产品相比，它们的抗氧化性提高了 18%。此外，阐明了Ti ₂ AlC/Ti _{2 AlN的作用。}氧化过程是全面的，主要由碳和 MAX 相的劣化决定。所得结果表明，与Ti _{2 AlC相比，Ti}₂ AlN更适合制备低碳MgO-C耐火材料。

更新日期：2023-03-15

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