Effect of CNT distribution on tribological behavior of alumina-CNT composites
Effect of CNT distribution on tribological behavior of alumina-CNT composites
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DOI：
10.1016/j.wear.2005.02.031
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发表时间：
2005-07-01
期刊：
影响因子：
5
通讯作者：
Jang, H
中科院分区：
文献类型：
--
作者：
Lim, DS;You, DH;Jang, H
采用两种不同的制备方法制备了不同碳纳米管体积分数的氧化铝-碳纳米管（CNT）复合材料，研究了CNT在陶瓷基体中的分布对复合材料摩擦学性能的影响。CNT含量高达12重量%的氧化铝-CNT复合材料通过流延、随后层压和热压来制造。为了比较，通过热压制备具有相同组成的复合材料。采用球-往复式摩擦磨损试验机研究了碳纳米管增强复合材料在室温无润滑条件下的摩擦磨损性能。热压试样的磨损率随添加量的增加而降低，但随着CNT的进一步添加而增加。流延复合材料的磨损率随着CNT添加量的增加而稳步下降，最高可达12重量%。测量取决于CNT添加的密度和机械性能。用扫描电镜观察磨损和未磨损表面。结果表明，流延成型工艺显著改善了碳纳米管在氧化铝中的均匀分布，从而提高了复合材料的耐磨性。(c)2005年爱思唯尔B. V.保留所有战斗。
Alumina-carbon nanotube (CNT) composites with a different volume fraction of CNTs were fabricated by two different processing methods to investigate the effect of the distribution of CNT in the ceramic matrix on the tribological behavior. Alumina-CNT composites with CNT content up to 12 wt.% were fabricated by tape casting, followed by lamination and hot pressing. For the comparison, composites with the same composition were prepared by hot pressing. The friction and wear behaviors of the CNT reinforced composites were investigated using a ball-on-reciprocating wear tester under an unlubricated condition at room temperature. The wear rate of hot-pressed samples decreased with increasing up to 4 wt.%, but increased with further addition of CNT. The wear rate of the tape casted composites decreased steadily with increasing CNT addition up to 12 wt.%. Density and mechanical properties depending on CNT addition were measured. SEM was employed to observe worn and unworn surface. All the results demonstrated that tape casting process significantly improved the uniform distribution of CNT in the alumina, resulting in enhanced wear resistance of composites. (c) 2005 Elsevier B.V. All fights reserved.