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采用化学镀的方法在碳纳米管表面镀覆一层铜纳米颗粒,旨在改善其与铝基体之间界面结合性能,从而提高复合材料最终的力学特性,用常压烧结与高温模压、热挤加工相结合的工艺制备碳纳米管增强铝基复合材料,通过X线衍射仪、扫描电子显微镜、透射电子显微镜等对经过表面化学镀的碳纳米管粉末和复合材料的结构与性能进行表征测试。结果表明:随着碳纳米管质量分数的增加(0~4.0%),复合材料的硬度逐渐上升,抗拉强度先升高后下降;当质量分数为3.5%,分别可达到207.74HB和453.84 MPa,比纯铝提高了230.6%和326.9%,相比不经任何处理直接添加碳纳米管制备的复合材料提高了47.5%和23.55%。
Electroless plating method is used to coat a layer of copper nano-particles on the surface of the carbon nanotubes to improve the interfacial bonding property between the carbon nanotubes and the aluminum substrate so as to improve the final mechanical properties of the composites. Atmospheric pressure sintering and high temperature molding, Processing and fabrication of carbon nanotubes reinforced aluminum matrix composites by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and so on through the surface of the electroless plating of carbon nanotube powder and composite material structure and properties of the test. The results show that with the increase of the mass fraction of carbon nanotubes (0-4.0%), the hardness of the composites gradually increases and the tensile strength first increases and then decreases. When the mass fraction is 3.5%, the hardness reaches 207.74HB and 453.84 MPa , Which is 230.6% and 326.9% higher than that of pure aluminum. Compared with the pure aluminum, the composite prepared by directly adding carbon nanotubes increased by 47.5% and 23.55%, respectively.