|Wednesday, August 25|
Effect of Plasma Immersion Ion Implantation of different gases on surface properties of FeMnC
* Letícia Andrade, Laval University - Laboratory for Biomaterials and Bioengineering (LBB), Canada
Carlo Paternoster, Laval University - Laboratory for Biomaterials and Bioengineering (LBB)
Sofia Gambaro, National Research Council - Institute of Condensed Matter Chemistry and Energy
Pascale Chevallier, Laval University - Laboratory for Biomaterials and Bioengineering (LBB)
Diego Mantovani, Laval University - Laboratory for Biomaterials and Bioengineering (LBB)
Current research on biodegradable iron-based alloys deals with the challenge of modulating the material degradation rate as well as its in vitro cytocompatibility. To overcome this limitation, a plasma surface modification strategy is proposed to tune the physicochemical properties and, as a consequence, control the electrochemical behavior of FeMnC alloy. The influence of time and gas chemical composition (O2, N2 and CH4) on the electrochemical behavior of Fe-13Mn-1.2C alloy was investigated.
Ultrashort laser texturing of biodegradable FeMn alloy: processability and degradation behavior
* Carlo Alberto Biffi, CNR, Italy
Sofia Gambaro, CNR
Jacopo Fiocchi, CNR
Chiara Bregoli, CNR
Francesco Copes, 3Laboratory for Biomaterials and Bioengineering, Dept. of Min., Met. and Mater. Eng. & CHU de Quebec Research Centre, Laval University
Diego Mantovani, 3Laboratory for Biomaterials and Bioengineering, Dept. of Min., Met. and Mater. Eng. & CHU de Quebec Research Centre, Laval University
Ausonio Tuissi, CNR
Among iron-based materials, the Fe-Mn system appears one of the most promising alloys for the development of biodegradable devices for temporary implants.The opportunity of tailoring the surface morphology of selected areas of such devices at both the micro and nano-scale can promote significant advances in the metal-human body interaction. In this work ultrashort laser texturing on Fe20Mn tapes was investigated. The effect of the main process parameters, i.e. laser power and scanning speed, on the surface morphology was systematically studied. Additionally, the degradation behaviour of selected surfaces was explored.
Ultrahigh-strength lean MgZnCa alloys for biodegradable implants
* Tatiana Akhmetshina, ETH Zurich, Switzerland
Leopold Berger, ETH Zurich
Robin Schäublin, ETH Zurich
Jörg F. Löffler, ETH Zurich
Lean Mg–Zn–Ca alloys are excellent candidates for biodegradable implants since they are biocompatible, and feature slow and homogeneous biodegradation. A broad application as implant material is, however, limited because of a moderate strength compared to the gold standard in the field, titanium. In this work, the tensile yield strength (TYS) of 430 MPa was reached for a lean Mg alloy, which so far is the highest strength reported for Mg–Zn–Ca alloys.