(哈尔滨工业大学 材料科学与工程学院，哈尔滨150001)
摘 要: 借助SEM和差热分析研究Ti-ZrO2(CaO)和TiAl-ZrO2(CaO)体系在不同加热速率时的界面显微组织和反应温度，并利用Kissinger方程对反应动力学参数进行计算。结果表明：随着加热速率的提高，Ti-ZrO2(CaO)和TiAl-ZrO2(CaO)体系的化学反应逐渐减弱，初始反应温度逐渐升高；Al元素的加入使Ti和ZrO2(CaO)的初始反应温度提高近170 ℃，从而弱化Ti与ZrO2(CaO)的界面反应；Ti-ZrO2(CaO)体系和TiAl-ZrO2(CaO)体系反应活化能分别为1 348 kJ/mol和1 675 kJ/mol，反应级数分别为1.51和1.59。
关键字: 氧化锆；差热分析；反应；显微组织
（School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China）
Abstract:The microstructures and the reaction temperatures of Ti-ZrO2(CaO stabilized) and TiAl-ZrO2(CaO stabilized) systems were researched at different heating rates by SEM and differential thermal analysis(DTA), and the reaction kinetics parameters in the two systems were calculated by means of Kissinger equation. The results show that, with the increase of heating rates, the chemical reactions of the two systems are weakened gradually, and the initial reaction temperatures increase. Compared to Ti-ZrO2(CaO stabilized) system, the initial reaction temperature in the TiAl-ZrO2(CaO stabilized) system increases about 170 ℃ and the interfacial reaction between Ti and ZrO2(CaO stabilized) is weakened. The activation energies of the two systems are 1 348 kJ/mol and 1 675 kJ/mol, and the reaction orders are 1.51 and 1.59, respectively.
Key words: zirconia; differential thermal analysis; reaction; microstructure
