纳米SiC颗粒增强铝镁复合材料的制备与性能研究

发布时间：2018-03-30 09:19

  本文选题：铝镁复合材料　切入点：纳米SiC_p　出处：《粉末冶金技术》2017年03期

【摘要】：采用放电等离子体烧结(spark plasma sintering,SPS)技术制备了含质量分数为0%、0.5%、1.0%、2.0%和5.0%的纳米SiC颗粒(SiC_p,平均粒径为40 nm)增强铝镁复合材料,通过扫描电镜(scanning electron microscope,SEM)观察铝镁复合材料微观组织形貌,并对复合材料进行了力学性能测试,研究了不同质量分数纳米SiC_p对复合材料相对密度和力学性能的影响规律,确定了制备复合材料最佳SiCp添加量。研究表明:随着纳米SiC_p质量分数的增加,复合材料的硬度逐渐增加,抗拉强度呈现先增加后降低的变化趋势,质量分数为1.0%的SiC_p增强铝镁复合材料的性能最好,相对密度和抗拉强度分别达到了98.36%和301.5 MPa。
[Abstract]:Aluminum-magnesium composites were prepared by spark plasma sintering (Spark plasma interning) technique. The nano-sized SiC particles containing 1.0% and 5.0% SiC particles were prepared by SICP technique. The microstructure and morphology of Al-Mg composites were observed by scanning electron microscopeSEM (SEM).The mechanical properties of the composites were tested and the effects of different mass fraction of nano-sized SiC_p on the relative density and mechanical properties of the composites were studied. The optimum addition amount of SiCp was determined.The results show that with the increase of SiC_p content, the hardness of the composites increases gradually, the tensile strength of the composites increases first and then decreases. The properties of the Al / mg composites reinforced by SiC_p with 1.0% mass fraction are the best.The relative density and tensile strength are 98.36% and 301.5 MPA, respectively.
【作者单位】： 北京科技大学新材料技术研究院;海安鹰球集团有限公司;
【基金】：国家自然科学基金资助项目(51471023)
【分类号】：TB333
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本文编号：1685294