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The co-authors of the development, as well as specialists from the UrFU Department of Heat Treatment and Metal Physics. Photo Credit: Rodion Narudinov |
Scientists from Ural Federal University, Institute of Strength Physics and Materials Science of the SB RAS and National Research Tomsk Polytechnic University have tested new titanium-based alloys, which have several advantages over traditional medical ones. Two types of titanium alloys — TNZ (including niobium and zirconium) and multi-element TNZTS (with niobium, zirconium, tantalum and tin) — were subjected to uniaxial pressing and multi-pass rolling. As a result of exposure, ultrafine-grained structures were formed in the alloys, which significantly increased the strength and hardness of the material. The results of the research were published in the Materials Letters Journal.
Crystal structure of titan (α-phase) that formed after tests trial improved the strength characteristics of the TNZ-alloy, but at the same time reduced its plasticity and Young’s modulus, important characteristics of materials for prostheses. In case of elastic deformations of the bone—implant system, the load on the tissue depends on the ratio of the Young's modulus of the implant material and bone tissue. The lower this ratio, the lower the probability of necrosis and destruction of bone by implant pressure. Mechanical and biocompatibility increase the prospects for the introduction of materials developed by scientists in medicine, aerospace and defense industries.