Microstructure Characteristics after combustion and fireproof mechanism of TiAl-based alloys

作者：Ouyang, Peixuan; Mi, Guangbao^*; Cao, Jingxia; Huang, Xu; He, Liangju; Li, Peijie

来源：Materials Today Communications, 2018, 16: 364-373.

DOI：10.1016/j.mtcomm.2018.07.012

• Intermetallics
• Microstructure
• Oxidation
• Diffusion
• Thermodynamic properties

TiAl-based alloys were combusted by friction in oxygen-enriched atmosphere. The microstructures and elemental distributions of the combusted specimens were investigated. The fireproof mechanism of TiAl alloys was revealed through discussing the combustion process in thermodynamics and kinetics. The results show that there are regional variations in microstructures of the combusted TiAl alloys, including heat affected zone, fusing zone and combustion zone. The excellent fireproof performance of TiAl alloys results from the formation of Al2O3-enriched microstructures in the combustion zone, which is attributed to the selective oxidation of Al during the combustion process.

• 出版日期2018-9
• 单位清华大学; 中国航发北京航空材料研究院