Strength and strain hardening of aluminum matrix composites with randomly dispersed nanometer-length fragmented carbon nanotubes
Strength and strain hardening of aluminum matrix composites with randomly dispersed nanometer-length fragmented carbon nanotubes
复制标题
DOI：
10.1016/j.scriptamat.2013.01.013
复制
发表时间：
2013-05
影响因子：
6
通讯作者：
S. Yoo;Seunghee Han;W. Kim
中科院分区：
文献类型：
--
作者：
S. Yoo;Seunghee Han;W. Kim
采用球磨与轧制相结合的方法制备了碳纳米管增强铝基复合材料。该复合材料具有高强度和高应变硬化能力，这两者的组合很少有报道。在球磨过程中，碳纳米管被破坏，成为低长径比管。经过处理的复合材料中的碳纳米管（几十纳米大小）随机均匀地分散在其颗粒内部。这种类型的CNT分布有助于通过Orowan机制进行加工硬化和强化。
Carbon nanotube (CNT)-reinforced aluminum composites were fabricated through ball milling combined with rolling. The composites exhibit high strength and high strain-hardening ability, the combination of which has been rarely reported. During the ball-milling process, CNTs were broken and became low aspect ratio tubes. The processed composites had the CNTs (a few dozen nanometers in size) randomly and uniformly dispersed in their grain interiors. This type of CNT distribution contributed to work hardening and strengthening by the Orowan mechanism.