【摘要】 利用工业粉尘作为硅源与镁合金进行化学反应,通过铸造方法原位制备了Mg2Si颗粒增强镁基复合材料,通过金相分析、XRD分析,研究了复合材料的组织结构和力学性能。结果表明,镁合金和硅粉发生原位反应生成了分布均匀粗大树枝状的Mg2Si,经过T6热处理后,粗大的树枝状Mg2Si转化成细小的颗粒状。制备的复合材料室温抗拉强度平均为254 MPa,屈服强度约为119 MPa,伸长率接近4%。更多还原

【Abstract】 The industrial silicon dust and magnesium alloy were used to prepare Mg2Si particulate reinforced magnesium matrix composites by casting.The structures of the composites and mechanical properties were studied by using of metallographic and XRD analysis.The results show that the in-situ reaction between magnesium alloy and silica produced uniformly distributed coarse dendrite Mg2Si phases,and after T6 heat treatment,the coarse dendrite Mg2Si phases transformed to small particles.Finally,the composite obtained has an average tensile strength of 254 MPa,the yield strength of about 119 MPa,and the elongation rate of nearly 4%.更多还原