Estudio de aleaciones de magnesio-calcio procesadas por torsión de alta presión para su uso en implantes bio-absorbibles

In this proposal, a series of advanced analyzes are proposed to characterize the nanostructure of magnesium-calcium (Mg-Ca) alloys processed by high pressure torsion (HPT) for application in bio-absorbable implants. Specifically, we propose to study the influence of grain refinement resulting from severe plastic deformation by HPT processing on the mechanical and electrochemical properties of the samples. Following, we propose to incorporate a third element such as zinc (Zn), manganese (Mn), strontium (Sr), tin (Sn) or silver (Ag) to the Mg-Ca alloy processed by HPT to study the effect on the strength and degradation (corrosion) in simulated bodily fluids. For both cases it is necessary to characterize the alloys by mechanical testing, scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDS), X-ray diffraction (XRD), corrosion resistance testing and transmission electron microscopy (TEM). The activities will be carried out at the Center for Materials Research and Extension (CIEMTEC) and the Institutional Microscopy Laboratory, and there will also be collaboration with the Magnesium Research Center in Kumamoto University, Japan. Finally, through the planned activities, the development of a nanostructure in the alloys, together with the optimization of the chemical composition, is the key strategy of the proposal to reduce the degradation rate of these alloys, which is the main obstacle for their massive implementation in biomedical implants.

Caracterizar aleaciones de magnesio-calcio procesadas mediante HPT para su utilización en implantes bio-absorbibles.

En esta propuesta se desarrollan las líneas de investigación de “Tecnologías avanzadas para el desarrollo y aplicación de materiales” y “Caracterización de Materiales y Ensayos no-destructivos”