Abstract
Medical β-alloys of the Ti – Zr – Nb system are promising materials for creating bone implants that do not contain metals toxic to the human body. Powder metallurgy makes it possible to create porous structures based on this class of materials, thereby improving the osseointegration of bone tissues. However, the shape and size of the pores in an implant depend on the size and morphology of the initial powder. In light of this, the effect of the temperature and duration of calcium-hydride synthesis on the phase composition and morphology of the Ti – 18 Zr – 15 Nb (at. %) powder is studied in the current research. It has been established that with an increase in the duration and temperature of synthesis, the average size of powder particles increases, and the powder morphology and particle size distribution law change due to the formation of agglomerates. It has also been shown that during the formation of the β-solid solution, the synthesis process occurs in three stages. The first stage is governed by reduction reactions on the contact surface “oxide – liquid calcium”. The third stage is controlled by solid solution heterodiffusion. At the second stage, the synthesis process combines both mechanisms.
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