In this study, in-situ Al₂O_3p/Al composite was prepared by the exothermic dispersion method from Al-calcined kaolin system. Thermodynamic analysis was carried out by calculating Gibbs free energy. The reaction kinetics of the system was studied by differential scanning calorimetry and Kissinger equation. The effects of heating temperature and holding time on the microstructure of the composites were analysed. The results showed that the reaction activation energy of the system continued to increase with the progress of the reaction. With the extension of the reaction time at 800°C, the particle size of Al₂O₃ increased slowly. When the holding time was 50 min, the density and hardness of the composite material were 2.7 g cm⁻³ and 64HV respectively.

在本研究中，采用放热分散法从铝煅烧高岭土体系原位制备Al ₂ O _3p /Al 复合材料。通过计算吉布斯自由能进行热力学分析。通过差示扫描量热法和Kissinger方程研究了体系的反应动力学。分析了加热温度和保温时间对复合材料微观结构的影响。结果表明，体系的反应活化能随着反应的进行而不断增加。随着 800°C 反应时间的延长，Al ₂ O ₃的粒径缓慢增加。当保温时间为50 min 时，复合材料的密度和硬度分别为2.7 g cm ^-3和64HV。