中文摘要：

采用电流直加热动态热压烧结工艺制备陶瓷颗粒增强铁基复合材料,研究高体积分数（25%,30%,35%）下,单一类型颗粒（SiC,TiC,TiN）及混合类型颗粒（TiC＋TiN,SiC＋TiN,SiC＋TiC）作为增强相对铁基复合材料磨损性能的影响。结果表明：单一类型粒子强化时,TiNP/Fe复合材料的耐磨性最好,TiCP/Fe次之,SiCp/Fe最差。混合粒子作为增强体时,（TiC＋TiN）P/Fe复合材料磨损性能显著优于其对应的单一颗粒增强材料;其中粒子含量为30%时,（TiC＋TiN）P/Fe复合材料磨损性能提高最大,其磨损量比TiCP/Fe降低了51.9%,比TiNp/Fe复合材料降低了44.1%,体现出可贵的混合增强价值。（SiC＋TiC）_P/Fe和（SiC＋TiN）P/Fe复合材料的磨损性能分别处于对应的两个单一颗粒增强材料之间。磨损表面观察表明,耐磨性好的（TiC＋TiN）P/Fe复合材料的磨损机理为磨粒磨损,而（SiC＋TiC）_P/Fe和（SiC＋TiN）P/Fe复合材料除磨粒磨损外还存在明显的疲劳磨损现象。

英文摘要：

Ceramic particles reinforced iron matrix composites were prepared by the dynamic tempera-ture resistant hot press technology. The wear resistance of the iron matrix composites reinforced by monolithic particles （SiC, TiC, TiN） and hybrid particles mixture （TiC＋TiN,SiC＋TiN,SiC ＋ TiC） under high volume fraction of 25 % , 30 % and 35 % were investigated. The results show that when using monolithic particle as reinforcement, the wear resistance of the TiNp/Fe composite is the best among the three monolithic composites, the TiCP/Fe is the second and the SiCP/Fe is the worst. The wear resistance of （TiC＋TiN）P/Fe is better than that of the composites reinforced by corresponding monolithic particles, which represents the great effect of hybrid strengthening. When the volume frac-tion of particles is 30%, the wear resistance of the （TiC＋TiN）P/Fe composite increases the most and the wear loss decreases by 51. 9 % and 44. 1 % than that of the TiCP/Fe and TiNp/Fe, respectively. However, the wear resistance of （SiC ＋ TiC）P/Fe and （SiC＋TiN）P/Fe composites are between that of the two corresponding monolithic composites. The microstructure of worn surfaces shows that the wear mechanism of the （TiC＋TiN）P/Fe composite is abrasive wear, while that of the （SiC＋TiN）P/Fe and （SiC＋TiC）P/Fe are fatigue and abrasive wear.