Enhanced mechanical properties of carbon nanotube-reinforced magnesium composites with zirconia fabricated by spark plasma sintering

Abstract

This study aims to enhance carbon nanotube (CNT)-reinforced magnesium (Mg) matrix composites fabricated by spark plasma sintering (SPS). Ultrasonic treatment with organic solvent (DMAc) and dispersant (K2CO3) were used for the processes to make each CNT apart. Nano-order ceramic powders of zirconia (ZrO2) were found to be effective to keep uniform dispersion of CNT in Mg matrix. Low melting point metals such as Sn were added to fill voids and cracks in the composites. Post-SPS rolling was also employed aiming to improve the microstructures. The fabricated CNT-reinforced Mg composites were investigated on mechanical properties such as hardness and three-point bending strength to be related to the microstructures.

Characterization and strengthening mechanism of CNT/TiB2 particulates added AZ91D composites

“…The results of artificial neural network (ANN) were compared with support vector regressor and random forest method, and promising output was obtained from ANN models. Tsukamoto [12] used spark plasma sintering to create CNT-added magnesium composites. It was asserted that obtaining composites with superior properties was challenging due to low dispersibility and developing accumulations of CNT, as well as the existence of void spaces and fractures in the composites.…”

Tensile strength and anisotropy of repeated hot-rolled carbon nanotube/aluminum matrix composites

“…[1][2][3] CNT is a seamless tube in which a honeycomb-structured layer is rolled into a cylindrical shape, and depending on the number of carbon layers, CNT can be classified into two categories, single-walled carbon nanotube (SWCNT) and multi-walled carbon nanotube (MWCNT). [4][5][6][7][8] Carbon nanotube can be a potential reinforcement of high-performance metal matrix composites (MMCs) due to their variety of excellent properties. [9][10][11][12] However, it has been reported that there is difficulty in dispersing CNT uniformly in the matrix.…”

“…1–3 CNT is a seamless tube in which a honeycomb-structured layer is rolled into a cylindrical shape, and depending on the number of carbon layers, CNT can be classified into two categories, single-walled carbon nanotube (SWCNT) and multi-walled carbon nanotube (MWCNT). 4–8…”