Abstract
Vacuum induction melting (VIM) and vacuum arc remelting (VAR) methods were used to produce biocompatible Ti-Nb-based alloys. In case of VIM BeO was used as material of crucible, and copper mold cup in case of VAR. Superelastic biocompatible Ti-22Nb-3Ta-3Zr, Ti-22Nb-6Ta and Ti-22Nb-6Zr (at %) alloys were produced. Samples of obtained alloys were investigated by scanning electron microscopy with XRSMA. It was shown that bulk chemical compositions of all VAR alloys exactly corresponded to their nominal chemical compositions. Element distribution maps showed that there was significant chemical inhomogeneity in VIM samples. On the other hand, VAR samples had no such areas and all elements were distributed homogeneously.
Highlights
There are high special requirements to materials which are used in maxillofacial surgery and arthroplasty
Three test ingots of Ti-22Nb-3Ta-3Zr alloys were obtained by vacuum induction melting in «LeyboldHeraeus» furnace using high purity raw materials
Some pieces of niobium were not completely remelted that has led to significant deviations from the nominal chemical composition across the ingot section
Summary
There are high special requirements to materials which are used in maxillofacial surgery and arthroplasty. Special attention should be paid to the search for rational method of producing biocompatible alloys because the quality of obtained ingot has great influence on material functional properties, their stability and reproducibility. %) alloys were obtained by vacuum induction melting in «LeyboldHeraeus» furnace using high purity raw materials.
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