通过等离子体和高速氧燃料喷涂成型制备碳纳米管增强铝纳米复合材料

Carbon nanotube reinforced aluminum nanocomposite via plasma and high velocity oxy-fuel spray forming.

作者信息

Laha T, Liu Y, Agarwal A

机构信息

Department of Mechanical and Materials Engineering, Florida International University, Miami, Florida, USA.

出版信息

J Nanosci Nanotechnol. 2007 Feb;7(2):515-24.

PMID:17450788

Abstract

Free standing structures of hypereutectic aluminum-23 wt% silicon nanocomposite with multiwalled carbon nanotubes (MWCNT) reinforcement have been successfully fabricated by two different thermal spraying technique viz Plasma Spray Forming (PSF) and High Velocity Oxy-Fuel (HVOF) Spray Forming. Comparative microstructural and mechanical property evaluation of the two thermally spray formed nanocomposites has been carried out. Presence of nanosized grains in the Al-Si alloy matrix and physically intact and undamaged carbon nanotubes were observed in both the nanocomposites. Excellent interfacial bonding between Al alloy matrix and MWCNT was observed. The elastic modulus and hardness of HVOF sprayed nanocomposite is found to be higher than PSF sprayed composites.

摘要

通过两种不同的热喷涂技术，即等离子喷涂成型（PSF）和高速氧燃料（HVOF）喷涂成型，成功制备了具有多壁碳纳米管（MWCNT）增强的过共晶铝 - 23 wt% 硅纳米复合材料的独立结构。对两种热喷涂成型的纳米复合材料进行了微观结构和力学性能的对比评估。在两种纳米复合材料中均观察到Al-Si合金基体中存在纳米尺寸的晶粒，以及物理上完整且未受损的碳纳米管。观察到铝合金基体与MWCNT之间具有优异的界面结合。发现HVOF喷涂的纳米复合材料的弹性模量和硬度高于PSF喷涂的复合材料。