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Technical Brief

Fabrication of Zinc-Tungsten Carbide Nanocomposite using Cold Compaction Followed by Casting

[+] Author and Article Information
Injoo Hwang

Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, Los Angeles, CA 90095
injoo2012@ucla.edu

Zeyi Guan

Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, Los Angeles, CA 90095
guanzeyi@g.ucla.edu

Xiaochun Li

Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, Los Angeles, CA 90095
xcli@seas.ucal.edu

1Corresponding author.

ASME doi:10.1115/1.4040026 History: Received January 04, 2018; Revised April 13, 2018

Abstract

Zinc (Zn) has been an important material in numerous applications since it has preeminent ductility and offers a super high ultimate tensile strain, as well high corrosion resistivity and good biocompatibility. However, since it suffers from low mechanical strengths, most of the applications would use Zn as a coating or alloying element. In this study, a new class of Zn nanocomposite with significantly enhanced mechanical property is introduced. The zinc-10 vol.% tungsten carbide (Zn-10WC) nanocomposite was fabricated by cold compaction followed by casting. The Zn-10WC nanocomposites offer a uniform nanoparticle dispersion with little agglomeration or sintering, exhibiting significantly enhanced mechanical properties by micropillar compression tests and microwire tensile testing. The nanocomposites offer an over 200% and 180% increase in yield strength and ultimate tensile strength respectively. The strengthening effect could be attributed to Orowan Strengthening and grain refinement induced by nanoparticles.

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