【摘要】 Ti₃AlC₂属于三元层状化合物MAX相，兼具金属的韧性和陶瓷的耐高温、耐氧化、耐腐蚀的综合性能，可用作高温结构材料。本工作研究了Ti₃AlC₂MAX相块材的抗高温氧化和耐热盐腐蚀性能。结果表明，750℃时，Ti₃AlC₂样品的氧化168 h,氧化产物主要是α-Al₂O₃, TiO₂-Rutile和TiO₂-Anatase,氧化增重为2.4 mg/cm²;在伴有NaCl和水的条件下腐蚀240 h,腐蚀产物主要是α-Al₂O₃, TiO₂-Rutile, TiO₂-Anatase和Na₂TiO₃腐蚀增重为4.4 mg/cm²。Ti₃AlC₂的氧化和腐蚀动力学均遵循线性率。更多还原

【Abstract】 Ti₃AlC₂ is the ternary layered compound. MAX phase can be used as a high-temperature structural material, which combines the toughness of metal and the comprehensive performance of high-temperature resistance, oxidation resistance and corrosion resistance of ceramics. The oxidation resistance and hot corrosion resistance of Ti₃AlC₂ were studied. The results showed that the oxidation production were α-Al₂O₃, TiO₂-Rutile and TiO₂-Anatase. The oxidation mass gain of Ti₃AlC₂ sample was 2.4 mg/cm² for 168 h at 750 ℃. The corrosion production were α-Al₂O₃, TiO₂-Rutile, TiO₂-Anatase and Na₂TiO₃. The corrosion mass gain was 4.4 mg/cm² for 240 h under the NaCl and water. Both oxidation and corrosion kinetics of Ti₃AlC₂ followed a linear rate.更多还原