高性能碳纳米管增强AZ91D镁基复合材料的制备（英文）

发布时间：2018-05-19 22:26

本文选题：镁合金 + 碳纳米管　；参考：《Transactions of Nonferrous Metals Society of China》2017年08期

【摘要】：采用球磨加搅拌铸造工艺制备了CNTs(质量分数为0.1%)增强的AZ91D镁基复合材料。通过光学显微镜、X射线衍射仪、傅里叶红外光谱仪、扫描电子显微镜、透射电子显微镜和室温拉伸试验对复合材料进行表征和分析。结果表明:碳纳米管在镁基体中分散很均匀,并且复合在基体中的碳纳米管结构较完整。与AZ91D基体相比,复合材料屈服强度和伸长率分别提高了47.2%和112.2%。碳纳米管在基体中的均匀分散且与基体形成的强界面结合使复合材料屈服强度和伸长率同时得到了提升。此外,晶粒细化和基体中均匀分散的β相(Mg_(17)Al_(12))也有助于复合材料力学性能的提高。
[Abstract]:AZ91D magnesium matrix composites reinforced by CNTs (0.1 mass fraction) were prepared by ball milling and agitation casting. The composites were characterized and analyzed by optical microscope X-ray diffractometer, Fourier transform infrared spectrometer, scanning electron microscope, transmission electron microscope and tensile test at room temperature. The results show that the carbon nanotubes are dispersed uniformly in magnesium matrix, and the structure of the carbon nanotubes composite in the matrix is relatively complete. Compared with AZ91D matrix, the yield strength and elongation of the composites increased by 47.2% and 112.2%, respectively. The uniform dispersion of carbon nanotubes in the matrix and the strong interfacial bonding with the matrix can increase the yield strength and elongation of the composites at the same time. In addition, grain refinement and homogeneous dispersion of 尾 -phase in the matrix also contribute to the improvement of the mechanical properties of the composites.
【作者单位】：南昌大学材料加工工程系;新余学院新能源科学与工程学院;
【基金】：Project(51464034) supported by the National Natural Science Foundation of China Projects(GJJ151309,GJJ151010) supported by the Education Department of Jiangxi Province,China
【分类号】：TB333

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