Microstructure and mechanical properties of bulk carbon nanotubes compacted by spark plasma sintering

Zhao Hui Zhang*, Long Qi, Xiang Bo Shen, Fu Chi Wang, Shu Kui Lee

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

22 引用 (Scopus)

摘要

Multi-walled carbon nanotube bulk materials were prepared by spark plasma sintering at 1700-2000°C. The effect of the sintering temperature on the microstructure and mechanical properties of the bulk materials were investigated. The results indicated that with increasing sintering temperatures, the density, electrical conductivity, bending strength and fracture toughness of the compacts all increase. However, when the sintering temperature exceeds 1900°C, the density slowly increases, resulting in a slow increase in bending strength. The multi-walled carbon nanotube bulk material sintered at 2000°C exhibits the highest density of 1.56×103Kg/m3 with an electrical conductivity of 5.23×105S/m, bending strength of 77.9MPa and fracture toughness of 4.06MPam1/2. The formation of the graphene nanosheets is the main factor that greatly improves the electrical conductivity of the bulk materials. In addition, graphitization was observed and the surface of the bulk material became covered by the interlocked graphene layers when the surface was polished.

源语言英语
页(从-至)12-17
页数6
期刊Materials Science and Engineering: A
573
DOI
出版状态已出版 - 20 6月 2013

指纹

探究 'Microstructure and mechanical properties of bulk carbon nanotubes compacted by spark plasma sintering' 的科研主题。它们共同构成独一无二的指纹。

引用此

Zhang, Z. H., Qi, L., Shen, X. B., Wang, F. C., & Lee, S. K. (2013). Microstructure and mechanical properties of bulk carbon nanotubes compacted by spark plasma sintering. Materials Science and Engineering: A, 573, 12-17. https://doi.org/10.1016/j.msea.2013.03.001