Laser Composite Surfacing of a Magnesium Alloy with TiO₂ Nanoparticles

Abstract:

In the study, ZM5 Mg alloy was laser melted by dispersion of TiO₂ nanoparticles on its surface. The microstructure of the composite surfaced layer (both the top surface and the cross section) was characterized by optical and scanning electron microscope. A detailed analysis of the composition of the composite layer was carried out by energy dispersive spectroscopy. The microhardness of the composite layer was measured and the wear of the composite surfaced ZM5 was studied. Experimental results showed that composite surface layer consists of TiO₂ particles in grain refined ZM5 matrix, but the nanoparticles was agglomerated. And there was degradation of TiO₂ particles or interfacial reaction at the particle-matrix interface. Microhardness and wear resistance of the composite surfaced zone was improved compared to ZM5 substrate.

• Periodical: Advanced Materials Research (Volume 549)
• Pages: 643-646
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.549.643
• Online since: July 2012
• Authors: Min Zhang, Chang Jun Chen, Qun Xing Fei
• Keywords: Laser Melting, TiO₂ Nanoparticle, ZM5 Mg Alloy

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