碳纳米管和氧化铝混杂增强铝基复合材料的制备及力学性能

发布时间：2018-06-30 08:15

本文选题：碳纳米管 + 氧化铝　；参考：《材料工程》2016年07期

【摘要】：采用化学气相沉积结合机械球磨的方法制备了碳纳米管(CNTs)和Al_2O_3颗粒混杂增强铝基复合材料,研究了球磨时间、Al_2O_3含量对复合材料组织和力学性能的影响。结果表明:本方法可以获得CNTs和Al_2O_3颗粒在铝基体内的均匀分散。随球磨时间的增加,复合材料的硬度随之增大;当球磨时间为180min时,复合材料硬度达纯铝的2.1倍。此外,随Al_2O_3颗粒含量的增加,复合材料的硬度和压缩屈服强度均不断提高。当Al_2O_3的质量分数为4%时,CNTsAl_2O_3/Al复合材料的硬度达112.1HV,为纯铝的2.8倍;压缩屈服强度达416MPa,为纯铝的4.6倍,说明CNTs和Al_2O_3的混杂加入发挥了良好的协同增强效果。
[Abstract]:Carbon nanotubes (CNTs) and Al _ 2O _ 3 particle hybrid reinforced aluminum matrix composites were prepared by chemical vapor deposition (CVD) combined with mechanical ball milling. The effect of Al _ 2O _ 3 content during milling time on the microstructure and mechanical properties of the composites was studied. The results show that the homogeneous dispersion of CNTs and Al2O3 in aluminum matrix can be obtained by this method. The hardness of the composite increases with the increase of ball milling time, and when the milling time is 180min, the hardness of the composite is 2.1 times as high as that of pure aluminum. In addition, with the increase of Al _ 2O _ 3 particle content, the hardness and compressive yield strength of the composite increase continuously. When the mass fraction of Al2O3 is 4, the hardness of CNTsAl2O3 / Al composite is 112.1 HVV, which is 2.8 times that of pure aluminum, and the compressive yield strength is 416 MPa, 4.6 times that of pure aluminum, indicating that the mixed addition of CNTs and Al2O3 plays a good synergistic strengthening effect.
【作者单位】：中国民航大学中欧航空工程师学院;中国民航大学天津市民用航空器适航与维修重点实验室;
【基金】：国家自然科学基金(51301198) 中央高校基本科研业务费中国民航大学专项(3122014H005) 中国民航大学天津市民用航空器适航与维修重点实验室开放基金资助(CAAM01)
【分类号】：TB333;TB383.1

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