碳纤维增强铁基复合材料的制备及其耐磨性能研究

Study on Preparation and Wear Resistance of Carbon Fiber Reinforced Iron Matrix Composite

以碳纤维和铁粉为原材料,采用粉末冶金方法分别制备碳纤维质量分数为0%、0.5%和1%的碳纤维增强铁基复合材料。用MM-200试验机测试该复合材料的磨损性能。用光学显微镜和扫描电镜来表征复合材料的显微结构以及磨损表面。结果表明:碳纤维在铁基复合材料中分布均匀。在碳纤维含量为0.5%的铁基复合材料中,碳纤维呈点状分布,周围有许多小孔,表面疏松;在碳纤维含量为1%的复合材料中,碳纤维与铁基结合成片状向外延伸,周围小孔较少,表面致密。随碳纤维含量的增加,该复合材料的磨损率降低,硬度增加。

Using carbon fiber and iron powder as the material, carbon fiber reinforced iron matrix composite containing carbon fiber at weight fractions in the range of 0%,0.5%,1% were fabricated by P/M method, respectively. The wear property of the composite was investigated on MM-200. Optical microscopy（OM） and scanning electron microscopy（SEM） were used to characterize the microstructure and worn surface of the composite. The results indicate that the carbon fibers uniformly distribute in the iron matrix. In the 0.5wt% carbon fiber/Fe composite, the carbon fiber generates spotty distribution, surrounded by many small holes. In the lwt% carbon fiber/Fe composite, carbon fiber and iron combine into sheet, extending outwardly, and the numbers of the small holes in the surrounding are less and the surface of the composite is denser. With the increase of carbon fiber content, the wear rate of the composite decreases and the hardness increases.