Functionally Graded Dual-nanoparticulate-reinforced Aluminium Matrix Bulk Materials Fabricated by Spark Plasma Sintering
Functionally Graded Dual-nanoparticulate-reinforced Aluminium Matrix Bulk Materials Fabricated by Spark Plasma Sintering
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DOI：
10.1016/j.jmst.2014.03.003
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发表时间：
2014-08
影响因子：
10.9
通讯作者：
H. Kwon;M. Leparoux;A. Kawasaki
中科院分区：
文献类型：
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作者：
H. Kwon;M. Leparoux;A. Kawasaki
采用高能球磨结合固态放电等离子烧结工艺成功制备了碳纳米管（CNT）和纳米碳化硅（nSiC）增强铝基复合材料。使用nSiC作为固体混合剂，碳纳米管在Al颗粒中分散良好。使用两种不同类型的多壁CNT以在相同体积中添加不同量的CNT。球磨的Al-CNT-nSiC和Al-CNT粉末混合物被完全致密化，并表现出良好的粘附性，在FG多层复合材料内没有严重的微裂纹和孔隙。每层含有不同量的CNT，并且nSiC添加剂显示出不同的显微结构和硬度。可以通过Al-CNT-nSiC梯度层的有效设计来控制FG多层复合材料的特性。这一概念为制备双纳米颗粒增强铝基纳米复合材料提供了一种可行的方法，并可应用于聚合物和陶瓷体系等其他场合。
Functionally graded (FG) carbon nanotubes (CNT) and nano-silicon carbide (nSiC) reinforced aluminium (Al) matrix composites have been successfully fabricated using high-energy ball milling followed by solid-state spark plasma sintering processes. The CNTs were well-dispersed in the Al particles using the nSiC as a solid mixing agent. Two different types of multi-walled CNTs were used to add different amounts of CNTs in the same volume. The ball milled Al–CNT–nSiC and Al–CNT powder mixtures were fully densified and demonstrated good adhesion with no serious microcracks and pores within an FG multilayer composite. Each layer contained different amounts of the CNTs, and the nSiC additions showed different microstructures and hardness. It is possible to control the characteristics of the FG multilayer composite through the efficient design of an Al–CNT–nSiC gradient layer. This concept offers a feasible approach for fabricating the dual-nanoparticulate-reinforced Al matrix nanocomposites and can be applied to other scenarios such as polymer and ceramic systems.