利用不同凝固速率和等通道挤压法制备不同组织结构的Sn3.8Ag0.7Cu合金,使其包含不同形貌、大小及分布的Ag3Sn金属间化合物;拉伸曲线的比较分析和变形后组织的电镜观察表明,大的针状化合物对合金起着纤维增强的作用,但自身脆性断裂造成空洞,降低了材料的塑性;微细颗粒状化合物起着弥散强化作用,分布在小的等轴晶粒晶界上的化合物颗粒能够阻碍晶界的滑动,起到增强的作用.
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