Al₂O₃–C refractories are potential candidates for use in gasifiers, and they are Cr₂O₃-free. However, the oxidation of the carbon species and ceramic phases within the high-temperature water vapor environment may deteriorate the integrity of the working lining. Ti₃AlC₂ has been verified as an effective antioxidant for Al₂O₃–C refractories in air. In this study, the structural transformation of Ti₃AlC₂ during heat treatment and the water vapor resistance of Ti₃AlC₂-containing Al₂O₃–C refractories are investigated. The results show that the oxidation of Ti₃AlC₂ and Si in the matrix contributes to the in situ formation of a multilayer core–shell structure of TiC–AlTi₂O₅–Al₆Si₂O₁₃. These structural evolutions improve densification and stimulate pore size refinement, which enhances the mechanical properties and thermal stress resistance of the specimens. In particular, the refined pore size contributes to the significantly improved water vapor resistance at high temperatures.

中文翻译：

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添加Ti3AlC2对低碳Al2O3-C耐火材料耐水蒸气性能的影响

Al ₂ O ₃ –C 耐火材料是用于气化器的潜在候选材料，并且它们不含 Cr ₂ O ₃。然而，高温水蒸气环境中碳物质和陶瓷相的氧化可能会破坏工作衬里的完整性。Ti ₃ AlC _{2已被证实是空气中Al 2} O ₃ –C耐火材料的有效抗氧化剂。本研究对热处理过程中Ti ₃ AlC ₂的结构转变和含Al ₂ O _{3的Ti 3} AlC _{2的耐水蒸气性进行了研究。}–C耐火材料进行了调查。结果表明，Ti ₃ AlC _{2和Si在基体中的氧化有助于TiC-AlTi 2} O ₅ -Al ₆ Si ₂ O ₁₃多层核壳结构的原位形成。这些结构演变改善了致密化并刺激孔径细化，从而增强了样品的机械性能和耐热应力。特别是，细化的孔径有助于显着提高高温下的耐水蒸气性。