材料期刊网

以化学共沉淀法制备出纳米Fe-Cu复合粉末并对其性能进行了表征．分别以此纳米Fe-Cu粉末和电解Cu粉与铁粉进行混合获得铁基粉末混合料，成形压坯在H2气氛中于不同温度下进行烧结，测定其加入不同形态Cu(合金)粉末铁基烧结坯的烧结性能．结果表明，在相同的Cu添加量及烧结条件下，添加纳米Fe-Cu粉末较加入电解Cu粉于铁基压坯中可以明显地提高压坯烧结后的密度、硬度及强度等性能；而添加纳米Fe-Cu粉末压坯在较低温度下烧结即可达到添加电解Cu粉压坯在较高温度下烧结后的性能水平，说明采用纳米Fe-Cu粉末形式向铁基压坯中引入Cu有利于制备高密度、高性能的铁基烧结材料．

The Fe-Cu nanopowder is prepared by a hquid chemical coprecipitation route and the properties of thepowder, such as phase conmposition, morphology and particle size are characterized by means of XRD and TEM. Subse-quent ferrous cormpacts with same Cu contents are pressed from mixtures of Fe powder with the addition of Fe - Cu nan-opowder and Cu electrolytic powder respectively. The compacts are then sintered in H2 atmosphere in a temperaturerange from 1 050 ℃ to 1 150 ℃ and the physical and mechanical properties of the sintered parts are detected. It isshown that the density, hardness and tensile strength of the sintered parts added with Fe - Cu nanopowder are obviouslysuperior to those added with Cu electrolytic powder, and a lower sintering temperature is needed when the Fe -Cu nan-opowder is employed than that with the Cu electrolytic powder. So the addition of Fe -Cu nanopowder can enhance thefabrication of sintering ferrous materials with higher density and improved mechanical properfes.