Influence of Ti₃AlC₂ on microstructure and thermal mechanical properties of Al₂O₃-Ti₃AlC₂-C refractories

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• 作者：Junfeng Chen ; ^{chenjunfengref@163.com" class="auth_mail" title="E-mail the corresponding author} ; Nan Li ; ^{linan@wust.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Wen Yan ; Yaowu Wei ; Bingqiang Han
• 关键词：Ti3AlC2 ; Low carbon-refractories ; Microstructures ; Thermal shock
• 刊名：Ceramics International
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：42
• 期：12
• 页码：14126-14134
• 全文大小：4020 K

文摘

Al₂O₃-Ti₃AlC₂-C refractories with different carbon content were prepared by using Ti₃AlC₂ as substitute for partially graphite. The influences of Ti₃AlC₂ on microstructure and thermal mechanical properties of Al₂O₃-Ti₃AlC₂-C refractories were investigated. The drastic deterioration in thermal mechanical properties of Al₂O₃-Ti₃AlC₂-C refractories was effectively prevented by reducing carbon content from 10 to 4 wt%. Particular attention was paid to the microstructure evolution of Ti₃AlC₂, the formations of Al₂TiO₅, SiAlON and Al-Si-C-O whiskers were developed to explain the limited fall in strength after thermal shock test in our works. The formation mechanism of the new bonded phases in the specimen with Ti₃AlC₂ was explained in this paper.