中文摘要：

用自发熔渗法制备了TiC基Fe40Al金属间化合物复合材料。用氧化增重方法，研究了Fe40Al／80vol％-88vol％TiC复合材料在700℃-1100℃的恒温空气中的氧化动力学，并借助SEM／EDS和XRD等手段研究了氧化过程中材料微观组织结构的演变及材料表面粗糙度对氧化特性的影响。复合材料的氧化增重和氧化时间呈幂函数关系，幂指数约为0．63—0．75，氧化速率随着氧化时间的延长而降低。氧化层主要由致密的TiO2组成，TiO2颗粒的尺寸与氧化温度和材料表面粗糙度有关。

英文摘要：

TiC matrix Fe40Al intermetallic composites were made by spontaneous infiltration. The oxidation kinetics of Fe40Al/80vol%-88vol%TiC composites were investigated by means of conducting the oxidation experiments in air at temperature of 700 ℃ - 1100 ℃ for up to 65 hours, and measuring the variations of the weight gains of the composites with the oxidation times. The microstructure evolution of the composites during the oxidation processing was studied by using SEM/EDS and XRD. The effect of the surface roughness of the composites on the oxidation behavior was also studied. The results show that, the weight gain data were fitted a power type law with the oxidation time with power coefficients ranging 0.63 - 0.75, the oxidation rate decreased with increasing the oxidation time. The oxidation layer was mainly composed of dense crystalline TiO2, the crystalline size of TiO2 was effected by the oxidation temperature and the surface roughness of the composites.