Functionally Graded Dual-nanoparticulate-reinforced Aluminium Matrix Bulk Materials Fabricated by Spark Plasma Sintering  

作　　者：Hansang Kwon Marc Leparoux Akira Kawasaki 

机构地区：[1]Department of Materials System Engineering,Pukyong National University,365 Sinsenro,608-759 Busan,Korea [2]Empa,Swiss Federal Laboratories for Materials Science and Technology,Advanced Materials Processing,Feuerwerkerstrasse 39,CH-3602 Thun,Switzerland [3]Department of Materials Processing Engineering,Graduate School of Engineering,Tohoku University,980-8579 Sendai,Japan

出　　处：《Journal of Materials Science & Technology》2014年第8期736-742,共7页材料科学技术（英文版）

摘　　要：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 dualnanoparticulate-reinforced Al matrix nanocomposites and can be applied to other scenarios such as polymer and ceramic systems.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 dualnanoparticulate-reinforced Al matrix nanocomposites and can be applied to other scenarios such as polymer and ceramic systems.

关 键 词：Carbon nanotubes（CNT） Silicon carbide High-energy ball milling Spark plasma sintering（SPS） Functionally graded materials（FGM） 

分 类 号：TB333[一般工业技术—材料科学与工程] TF124.5[冶金工程—粉末冶金]