Product Code: ICA10_M1207

Patterning of Magnesium with Silver Nanoparticles using Laser Assisted Direct Writing
Authors:
Ehsan Toyserkani, University of Waterloo, Department of Mechanical and Mechatronics Engineering; Waterloo ON Canada
Hamidreza Alemohamad, University of Waterloo, Department of Mechanical and Mechatronics Engineering; Waterloo ON Canada
Ehsan Foroozmehr, University of Waterloo, Department of Mechanical and Mechatronics Engineering; Waterloo ON Canada
Shahrzad Esmaeili, University of Waterloo, Department of Mechanical and Mechatronics Engineering; Waterloo ON Canada
Presented at ICALEO 2010

Surface patterning of biodegradable materials such as magnesium can improve cell adhesion and infiltration. In addition to biocompatibility, other properties of magnesium and its alloys such as load bearing capacity, and desirable low elastic modulus and corrosion resistance have attracted research in biomedical engineering for the development of biodegradable magnesium devices. In this paper a laser-based direct printing process is employed for the deposition and sintering of silver patterns on magnesium substrates. It consists ofsilver nanoparticle deposition and the laser post-annealing process to sinter the nanoparticles. The morphology and the mechanical bonding of the silver layers to the substrate are studied both theoretically and experimentally. A diffusion model is developed to study the diffusion of silver and magnesium at the interface and predict the formation of Ag-Mg alloys and intermetallic phases in the region. The modeling findings are compared with the experimental data by studying the microstructure of the samples fabricated at a wide range of laser processing parameters.