Mikrostruktura a vlastnosti Mg slitin pro biomedicínské aplikace

Abstract

Magnesium alloys are considered to be a biocompatible, biodegradable and bioresorbable material with relatively good mechanical properties. Due to these properties, magnesium alloys have a high potential to become a material to produce biodegradable implants. These implants dissolve in the human body and therefore do not need to be removed after the broken bone has healed. This bachelor thesis is focused on the investigation of the microstructure and mechanical properties of magnesium alloy Mg–Ca–Zn–0.8Mn for biomedical applications. In the experimental part, an ingot of this alloy was prepared and homogenized at 480 °C for 24 hours and water quenched. After thermal treatment, a part of samples was subjected to one pass of ECAP (Equal Channel Angular Pressing) at 290 °C. Metallographic observation of the microstructure was performed on an optical metallographic microscope for the as-cast, heat-treated and ECAPed condition. Phase analysis and chemical composition were observed using of a scanning electron microscope and energy dispersive spectroscopy. Mechanical properties were evaluated by Vickers microhardness measurement.