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采用搅拌摩擦加工法在Al基体中添加粒度30~40μm,8~10μm,2~3μm的Ni粉,制备Ni(400)/Al、Ni(1500)/Al及Ni(6500)/Al复合材料。采用SEM、EDS以及XRD对复合区微观结构及相组成进行分析。结果表明,Ni粉粉末粒度对生成的产物形态有较大影响,随着粉末尺寸增大,团聚效应减弱,破碎效果增强,Ni(6500)/Al、Ni(1500)/Al和Ni(400)/Al中Ni团体依次呈独特叠层状组织、类椭圆形结构和近圆形结构;粉末尺寸的增大对金属间化合物的生成更有利;与基体相比,Ni(6500)/Al、Ni(1500)/Al和Ni(400)/Al的抗拉强度依次提高了50%、59%和71.9%。
The Ni (400) / Al, Ni (1500) / Al and Ni (6500) / Al composites were prepared by adding friction stir process to Al matrix with Ni powders with grain sizes of 30-40μm, 8-10μm and 2-3μm. The microstructure and phase composition of the composite zone were analyzed by SEM, EDS and XRD. The results show that the particle size of Ni powder has a great effect on the morphology of the product. With the increase of powder size, the agglomeration effect is weakened and the crushing effect is enhanced. The Ni (6500) / Al, Ni (1500) / Al and Ni / Al in the Ni group was a unique laminated structure, oval-like structure and nearly circular structure; powder size increases the formation of intermetallic compounds more favorable; compared with the substrate, Ni (6500) / Al, Ni The tensile strength of (1500) / Al and Ni (400) / Al increased by 50%, 59% and 71.9% respectively.