alexa A Biodegradable Mg-1Ca-2Zn-1TCP Nanocomposite Fabricated By High Shear Solidification And ECAE | 24616
ISSN: 2157-7439

Journal of Nanomedicine & Nanotechnology
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4th International Conference on Nanotek & Expo

Yan Huang, Debao Liu, Lorna Anguilano, Chen You and Minfang Chen
Accepted Abstracts: J Nanomed Nanotechnol
DOI: 10.4172/2157-7439.S1.019
Abstract
A biodegradable magnesium matrix and β-tricalcium phosphate (β-TCP) nano-particles reinforced composite Mg-2Zn- 0.5Ca-1beta-TCP (wt%) was fabricated for biomedical applications by high shear solidification (HSS) combined with equal channel angular extrusion (ECAE). The HSS resulted in a fine and uniform grain structure with β-TCP particles globally uniformly distributed in the matrix in aggregates of 2-25mm in size. The as-cast microstructure was replaced by a refined deformation microstructure after ECAE processing at 300?C. During ECAE the β-TCP particle aggregates were broken into smaller ones or dispersed, forming a dispersoid of individual β-TCP particles in the matrix. ECAE processing increased both the hardness and the corrosion resistance of the material. The dispersed ]-TCP particles were considered to be largely responsible for the improved corrosion resistance. The composite was characterized in terms of microstructural evolution during fabrication, hardness and electrochemical performance during polarization and immersion tests in a simulated body fluid. The benefits of both HSS and ECAE for refining microstructure and improving particle distribution and the characteristic features of the corrosion behaviour for the material are discussed in the paper.
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