多壁碳纳米管对CuSn-Co系胎体力学性能的影响

发布时间：2018-05-31 08:32

  本文选题：金刚石钻头 + 多壁碳纳米管　； 参考：《粉末冶金工业》2017年05期

【摘要】：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。
[Abstract]:Carbon nanotubes (CNTs) have excellent mechanical properties and excellent physical properties (elastic modulus is 1.0 ~ 1.8 TPA, tensile strength is 150 GPA, density is up to 0.8 g / cm ~ (-3), thermal expansion coefficient is almost zero), and carbon nanotubes are ideal reinforcements of composites. The effects of the amount of MWCNT, sintering temperature and hot pressing pressure on the mechanical properties of CuSn-Co matrix were studied by orthogonal design. The influence of three factors on the mechanical properties of the matrix and its significance were analyzed by direct analysis and variance analysis respectively. The fracture morphology was observed by scanning electron microscope (SEM). The results showed that the addition of carbon nanotubes had a significant effect on the hardness and bending strength of the matrix, followed by the hot pressing pressure, while the sintering temperature had little effect on the hardness and bending strength of the matrix. The final optimal selection scheme is as follows: the mass fraction of w / MWCNT is 0.8, the hot pressing temperature is 850 鈩，

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