Ultra-High-Temperature Oxidation and Thermal Stability of Ti₂AlC in Air at 1600–1800 °C

详细信息    查看全文

• 作者：Jingjun Xu ; Zenghua Gao ; Yuhai Qian ; Meishuan Li
• 关键词：MAX phase ; Ti2AlC ; Ultra ; high ; temperature oxidation ; Thermal stability
• 刊名：Oxidation of Metals
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：86
• 期：3-4
• 页码：327-338
• 全文大小：1,356 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Inorganic Chemistry
  Tribology, Corrosion and Coatings
  Metallic Materials
  
• 出版者：Springer Netherlands
• ISSN：1573-4889
• 卷排序：86

文摘

The oxidation resistance and thermal stability of Ti₂AlC at 1600–1800 °C in air were studied by using induction heating method. The results showed that Ti₂AlC could survive with relatively low oxidation rate at temperatures up to 1650 °C for a short period of time due to the formation of an Al₂O₃ inner layer with certain protectiveness. However, at 1700 and 1800 °C, severe oxidation of Ti₂AlC happened, the entire Al₂O₃ inner layer no longer existed, and the whole oxide scale became porous, cracked and voluminous. In the oxidation processes, the Ti₂AlC substrate decomposed to TiC_x at 1700 °C, and transformed to Ti₃AlC₂ due to the reaction with TiC_x at 1800 °C, indicating that the massive consumption of Al in Ti₂AlC exceeded its deficiency tolerance.