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| HIGH TEMPERATURE OXIDATION BEHAVIOR OF Fe40Al/TiC COMPOSITES |
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| 浙江大学材料与化工学院材料系 |
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Abstract TiC matrix Fe40Al intermetallic composites were made by spontaneous infiltration. The oxidation ki?鄄netics of Fe40Al/80vol%-88vol%TiC composites were investigated by means of conducting the oxidation experi?鄄ments 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 oxida?鄄tion 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 in?鄄creasing 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.
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Received: 28 February 2006
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