摘要
通过粉末冶金法制备了(Mg_2B_2O_5w+ND)/ZK60镁基复合材料。利用X射线衍射仪、扫描电镜和金相显微镜对(Mg_2B_2O_5w+ND)/ZK60镁基复合材料组织进行观察和分析。结果表明,挤压后材料内部的大部分孔洞被消除,致密性得到了显著提高;随着增强体质量分数的增加,材料的硬度增大,最大值达到99 HB,伸长率则呈现出递减的趋势。当纳米金刚石的含量增至1 w%时,复合材料的综合力学性能较好,其极限抗拉强度和屈服强度分别为272.0和175.9 MPa。
（Mg2B2O5w＋ND）/ZK60 magnesium matrix composites were thbricated by powder metallurgy method. X-ray diffraction （XRD）, scanning electron microscope （SEM）, optical microscope （OM） were used for microstructure observation and analysis. The results show that the holes inside the materials are eliminated after extrusion, compactness is improved obviously. The hardness of the material increases with the increase of the mass fraction of the reinforcement, and the maximum value reaches 99 HB. While the elongation rate shows a decreasing trend. When the content nano-diamond increases to 1w%, the comprehensive mechanical properties of the composite are better, and the ultimate tensile strength and yield strength are 272.0 and 175.9 MPa, respectively.
出处
《铸造技术》
CAS
2018年第1期14-20,共7页
Foundry Technology
基金
青海省新型轻合金重点实验室资助项目(2017-ZJ-Y17)
关键词
镁基复合材料
微观组织
力学性能
粉末冶金
挤压
magnesium matrix composites
microstructure
mechanical properties
powder metallurgy
extrusion
