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碳纳米管具有超强的力学性能和优异的物理性能(弹性模量达1.0~1.8 TPa,抗拉强度达150 GPa,密度可达0.8 g/cm~3,热膨胀系数几乎为零),是复合材料的理想增强体。通过正交试验设计研究了多壁碳纳米管(MWCNT)的添加量、烧结温度、热压压力对CuSn-Co系胎体力学性能的影响,并分别通过直接分析法和方差分析法分析了3因素对胎体力学性能的影响程度及对胎体性能影响的显著性,采用扫描电镜观察其断口形貌。结果表明:碳纳米管的添加量对胎体的硬度和抗弯强度有非常显著的影响,其次是热压压力有显著影响,而烧结温度影响较小,最终的优选方案为:MWCNT添加质量分数为0.8%,热压温度为850℃,热压压力为35 MPa。
Carbon nanotubes have superior mechanical properties and excellent physical properties (elastic modulus of 1.0 to 1.8 TPa, tensile strength of 150 GPa, density up to 0.8 g / cm 3, thermal expansion coefficient is almost zero), is a composite The ideal material reinforcement. The effects of the addition amount of multi-walled carbon nanotubes (MWCNTs), sintering temperature and hot pressing pressure on the mechanical properties of CuSn-Co-based carcass were studied by orthogonal design. The effects of 3 The influence of factors on the mechanical properties of the carcass and the significant influence on the carcass performance were observed by scanning electron microscopy. The results show that the addition of carbon nanotubes has a very significant effect on the hardness and flexural strength of the matrix, followed by the hot-press pressure has a significant impact, but the sintering temperature has little effect on the final optimization program: MWCNT added mass fraction Is 0.8%, hot pressing temperature is 850 ° C, hot pressing pressure is 35 MPa.