Synergetic Reinforcement of Cu-11.0 wt.% Al Alloy with Al₂O₃ Nano-Sized Particles and Carbon Nanotubes CNTs

Volume 2 - Issue 2

Eid EA* and Ragab M

Received: September 23, 2019;   Published: October 17, 2019

DOI: 10.32474/MAMS.2018.02.000128

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Abstract

The present research has been reinforced the aluminum bronze matrix composites (ABMCs) of weight concentration (Cu₈₉-Al₁₁) by individual and/or hybrid additions of Al₂O₃ and CNTs. ABMCs were fabricated via powder metallurgy technique. The physical properties such as density, electrical conductivity, thermal conductivity, hardness, and wear rate of the ABMCs alloys have been investigated. Microstructure features were discovered by utilizing SEM and EDX examination. The addition of 2 wt. % of CNTs was caused more refined grains and increased their uniform distribution otherwise adding of 2 wt. % Al₂O₃ agglomerates throughout the active grain boundaries. The hybrid addition of 1.0 wt. % of Al₂O₃ and 1.0Wt % CNTs improved the both hardness and wear resistance due to the physical synergistic reinforcement of them. Moreover, their good distribution at the grain boundary can form Zener pinning effect that restrict the grains growth of its matrix. Additionally, the addition of 2 wt.% CNTs enhanced the electrical and thermal conductivity of ABMCs because the CNTs creating new conductive paths in Aluminum bronze (AB) matrix.

Keywords: Powder metallurgy; Aluminum bronze alloy; Hardness; Electrical conductivity; Wear rate

Abstract| Introduction| Experimental work| Results and Discussion| Conclusion| References|