Mirostructure and microhardness of aluminum-copper composite reinforced with multi-walled carbon nanotubes prepared by vacuum sintering and hot isostatic pressing techniques

Abstract

In this study, we report the processing, microstructure, and microhardness of aluminum-copper composites reinforced with multi-walled carbon nanotubes (CNTs). Composite powders were prepared by a high energy ball (HEB) milling process then consolidated by vacuum sintering and hot isostatic pressing (HIP) techniques. The specimens show a uniform dispersion of CNTs in the Al-Cu matrix with CNT content up to 1 wt.% and a cluster formation observed with higher CNT content of 1.5 wt.%. The specimens have a relative density of 92 % to 95 % for composites sintered by vacuum sintering and 93 % to 96 % for composites sintered by HIP. Microhardness of specimens increases with increasing CNT content up to 1 wt% and then decreases due to the formation of CNT clusters. Microhardness is enhanced both by the dispersion strengthening effect of CNTs and by precipitation hardening of Al-Cu matrix.

Al-10Mg Nanostructured Alloy by High-energy Mechanical Alloying

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The effect of aging processes on tribo-metallurgy properties of al based ternary alloys product by P/M technique

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Enhanced mechanical properties and wear resistance of cold-rolled carbon nanotubes reinforced copper matrix composites

“…Recently, many studies on using CNTs for MMCs (i.e. Al, Cu, Mg and Ni) have been published which demonstrated that CNTs could enhance the mechanical, thermal and electrical properties of the composites [6][7][8][9][10][11][12][13][14][15][16][17][18]. Among them, CNT/Cu composite is one of the most important composites due to their high potential applications in the electronics and electrical industries [19][20][21][22].…”