from the conferences organized by TANGER Ltd.
Currently, biosoluble materials are widely used for the manufacture of implants, among which the most promising are magnesium alloys. Magnesium is a natural element of the body - it is contained in bone and muscle tissue, is involved in various metabolic processes. In addition, magnesium and its biocorrosion products have excellent biocompatibility. The main advantage of magnesium alloys is the positive effect of magnesium on the human body, but their quality does not meet the requirements for their use in the human body. It is possible to increase the properties of magnesium alloys as a result of improving the processes of refining and modification of liquid melt. The technology of modification of cast magnesium alloys of Mg-Zr-Nd system by dispersed graphite powder is proposed. It is shown that the optimal carbon additive in the amount of 0.05 - 0.1 wt% C improves the mechanical properties due to grain grinding and additional strengthening of structural components. A complex filter containing equal amounts of magnesite, graphite and limestone is proposed, which provides an increased level of refining of the melt to obtain high quality casting. It is shown that the use of a complex carbon-containing filter provides not only efficient refining of the melt, but also its additional modification. In the structure of the alloy there is an increased amount of intermetallic γ-phase, which increases the microhardness of the structural components of the alloy and improves its physical and mechanical characteristics.
Keywords: Magnesium alloy, carbonaceous materials, filtration, modification, refining© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.