用粉末冶金法制备C_fAl复合材料研究

Study on C_f-Al Composite Material Prepared by Powder Metallurgy Process

以镀铜碳纤维和铝粉作原料,采用粉末冶金法制备了碳纤维增强铝基复合材料,并研究了压制力、烧结温度和碳纤维含量对复合材料性能的影响。结果表明,碳纤维含量为5%(质量分数)、压制力小于150 MPa时,坯体的密度随着压制力的增大而快速增大;若压制力超过150 MPa,则坯体密度随着压制力增大而缓慢上升;低温下,随着烧结温度的上升,复合材料的密度缓慢增大,强度也上升;但高温下,随着烧结温度的上升,材料密度上升速度加快,强度略降。复合材料烧结前后的密度均随着碳纤维含量的增加而降低。

Using copper-plated carbon fiber and aluminum powder as raw material, an aluminum base composite reinforced by carbon fiber was made by means of powder metallurgy process. The influence of pressing force, sintering temperature and carbon fiber content on the property of composite was investigated. The results indicate that when the carbon fiber content reaches 5 wt% , the density of composite blank will rise quickly under the pressing force less than 150 MPa and rise slowly under the pressing force higher than 150 MPa as the pressing force increases. As the sintering temperature of composite rises, the density will increase slowly and the strength will raise in the low-temperature zone, and the density will rise quickly and the strength will decrease slightly in the hightemperature zone. The densities of composite before and after sintering will all decrease with the increase of carbon fiber content in the composite.