纳米Mg2Sn增强镁基复合材料组织与性能

Microstructure and Properties of Mg2Sn Nanoparticle-reinforced Mg Matrix Composites

摘要:

利用纳米Sn粉高的表面活性,通过微米Mg粉与纳米Sn粉的机械合金化高效合成了含原位纳米Mg₂Sn相的复合粉末,将所得复合粉末热压烧结,获得高性能纳米Mg₂Sn增强镁基复合材料。对比研究了不同机械合金化时间对镁基复合材料组织、性能的影响,结果表明：随着机械合金化时间的延长,由纳米Mg₂Sn相组成的团簇尺寸不断减小,分布更加均匀,烧结态Mg₂Sn/Mg复合材料的各项力学性能也得到不断提高。

Abstract:

Due to high surface activity of nano Sn powder, the mixture powders containing in-situ nano Mg₂Sn phase were synthesized efficiently by milling micro Mg powders and nano Sn powders. High-performance Mg₂Sn/Mg composites were then prepared by hot-press sintering from the milled mixture powders. Effect of milling time on microstructure and properties of Mg₂Sn/Mg composites were investigated comparatively. The results show that, with the increase of milling time, the size of Mg₂Sn clusters consisting of Mg₂Sn nanophase decreases continuously, and Mg₂Sn clusters are distributed uniformly in the matrix. Moreover, the mechanical properties of sintered Mg₂Sn/Mg composites are also gradually improved.