利用机械合金化方法制备出Al-12%Sn-x%Si合金粉末，然后将其压制成型，并进行烧结得到块体合金；运用X线衍射仪(XRD)和扫描电镜(SEM)等研究Si添加量对Al-12%Sn合金组织和性能的影响。结果表明：添加Si使得Al-12%Sn合金中Sn相变得更加细小且均匀分布，并且通过形成Al-Si共晶液相能够有效改善合金的烧结活性，提高合金的致密度；随着合金中 Si 添加量增加，合金的硬度、强度和塑性都有大幅度提升。此外，添加Si的Al-12%Sn合金的摩擦磨损性能也有较大提高，Si含量为2.5%时，合金具有最优的摩擦性能。
The mechanical alloying (MA) was used to prepare Al-12%Sn-x%Si alloy powders, and then, the bulk alloy was obtained by a combination of cold pressing and conventional powder sintering. The effects of Si addition on the microstructure and properties were investigated by XRD and SEM. The results show that appropriate Si addition can achieve the uniform Sn distribution in Al-12%Sn matrix. It can also effectively facilitate sintering due to the formation of Al-Si eutectic liquid phase, and significantly improve the densification of alloy. With the Si addition increasing, the hardness, strength and ductility enhance obviously. In addition, Si addition can also develop excellent wear properties in Al-12%Sn alloys, furthermore, when the Si addition is 2.5%, Al-12%Sn-2.5%Si has the best wear properties.
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