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Volume 6

Research & Reviews: Journal of Material Sciences

ISSN: 2321-6212

Advanced Materials 2018

September 04-06, 2018

September 04-06, 2018 | Zürich, Switzerland

International Conference on

Advanced Materials & Nanotechnology

The role of CNTs on the characteristics of mechanically alloyed and spark plasma sintered CNT-Fe

nanocomposites

Jongsuk Nam

and

Chansun Shin

Myongji University, South Korea

etal composites reinforced by carbon nanotube (CNT) often show improved mechanical properties along with various

interesting properties associated with the interfaces between CNTs and metal matrix. For example; ion irradiation

experiments on CNT-aluminum composite demonstrate that the CNT-metal interfaces can act as efficient defect recombination

sites and as a result reduce void generation and radiation hardening. Most of the metal matrices studied so far are non-ferrous

metals, e.g., Al, Cu, Ni etc., and there are only few studies on CNT-ferrous alloy. A recent research paper concerning the

fabrication of 304LSS–CNT composites using mechanical alloying combined with hot pressing and melting has also been

found. Recently, we fabricated and investigated a 304 stainless steel and carbon nanotube (304SS-CNT) composite with an

aim to study its microstructures and high-temperature tensile properties. 304SS powders were mixed with carbon nanotubes

using ball milling and consolidated using the spark plasma sintering technique. Tensile specimens made from the consolidated

samples of 304SS-CNT were tested in a temperature range from 299 K to 773 K. The yield strength and the work hardening of

the 304SS-CNT samples were found to be higher than those of a sample fabricated from 304SS without carbon nanotubes for

all tested temperatures. 304SS-CNT samples have a microstructure significantly different from the 304SS sample, e.g., reduced

grain size and many small cuboidal particles. Composition analysis using energy-dispersive spectroscopy revealed that the

cuboidal particles are chromium carbides and the chromium content is reduced in the 304SS-CNT matrix. In this study,

we extended our previous work to CNT-Fe matrix composites. We will present the role of CNTs on the formation of micro

structures and mechanical properties of pure Fe and ferrous alloys.

Res. Rev. J Mat. Sci. 2018, Volume 6

DOI: 10.4172/2321-6212-C3-021