Synthesis of Cu-CNTs nanocomposites via double pressing double sintering method

Marjan Darabi,Masoud Rajabi

doi:10.30544/244319

Abstract

In this research, copper (Cu)-carbon nanotubes (CNTs) nanocomposites were synthesized with different weight percentages of CNTs by double pressing double sintering (DPDS) method as well as conventional sintering method. A planetary ball mill was used to disperse CNTs in Cu matrix. The milled powders were first cold pressed to 450 MPa in a uniaxial stainless-steel die with cylindrical compacts (diameter: 12 mm and height: 5 mm). The effect of CNTs content and the DPDS method on the properties of the nanocomposites were investigated. The microstructure and phase analysis of Cu-CNTs nanocomposite samples were studied by FESEM and X-Ray Diffraction. The electrical conductivity of nanocomposites was measured and compared to both sintering methods. Mechanical properties of Cu-CNTs nanocomposites were characterized using bending strength and micro-hardness measurements. Enhancements of about 32% in bending strength, 31.6% in hardness and 19.5% in electrical conductivity of Cu-1 wt.% CNTs nanocomposite synthesized by DPDS method were observed as compared to Cu-1 wt.% CNTs nanocomposites fabricated under the similar condition by a conventional sintering process.

Highlights

Copper is known as one the most effective materials used for thermal and electronic applications such as in large scale integrated circuits as interconnects in electronic industry [1], high-voltage switches, and magnetic confinement fusion reactorsMetall
Since the discovery of carbon nanotubes (CNTs) in 1991 by Iijima [4,5,6], some considerable achievements are gained in different areas of research and development [7]
The aim of this work is to compare the mechanical and physical properties of composites fabricated by double pressing double sintering (DPDS) technique and conventional sintering method

Summary

Introduction

Copper is known as one the most effective materials used for thermal and electronic applications such as in large scale integrated circuits as interconnects in electronic industry [1], high-voltage switches, and magnetic confinement fusion reactors. [2] for many years, Cu usage is limited in these applications due to its low mechanical strength [3]. Since the discovery of CNTs in 1991 by Iijima [4,5,6], some considerable achievements are gained in different areas of research and development [7]. A revolution occurred in numerous areas of materials science and technology [8]. Carbon nanotubes display excessive strength along with high thermal conductivity and exclusive electrical properties [9]

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Results

Conclusion