不同烧结温度下火花等离子烧结铝-碳纳米管复合材料的挤压
Extrusion of spark plasma sintered aluminum-carbon nanotube composites at various sintering temperatures.
作者信息
Kwon Hansang, Kawasaki Akira
机构信息
Department of Materials Processing, Graduate School of Engineering, Tohoku University, 6-6-2 Aramaki Aza Aoba-ku, Sendai 980-8579, Japan.
出版信息
J Nanosci Nanotechnol. 2009 Nov;9(11):6542-8. doi: 10.1166/jnn.2009.1357.
The combined processes of spark plasma sintering and hot extrusion were used to fabricate a multi-walled carbon nanotube (MWCNT) reinforced aluminum (Al) matrix composite. The structural defects of carbon nanotubes (CNT) at various sintering temperatures were investigated by Raman spectroscopy. A small amount of Al liquid phase was generated and it reacted with disordered CNTs, even during the solid-state spark plasma sintering process. The influence of Al carbides generated by the reaction between Al and disordered CNTs is discussed from a microstructural viewpoint and in relation to tensile strength. We conclude that structurally controlled CNTs could potentially be attractive for metal matrix applications, and could significantly improve the mechanical properties of AI-CNT composites.
采用放电等离子烧结和热挤压相结合的工艺制备了多壁碳纳米管（MWCNT）增强铝（Al）基复合材料。通过拉曼光谱研究了不同烧结温度下碳纳米管（CNT）的结构缺陷。即使在固态放电等离子烧结过程中，也会产生少量的Al液相，并且它会与无序的CNT发生反应。从微观结构的角度并结合拉伸强度，讨论了Al与无序CNT反应生成的碳化物的影响。我们得出结论，结构可控的CNT在金属基应用中可能具有吸引力，并且可以显著提高Al-CNT复合材料的力学性能。
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