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National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 
Biocompatibility of transition metal alloys: physical-chemical background
 Rafaj, Zdeněk ; Nehasil, Václav (advisor) ; Kolářová, Tatiana (referee)
Titanium alloys are widely used for manufacturing of bone implants. Recent studies proved superior mechanical and chemical properties of TiNb alloys. The performance of TiNb is analyzed on Ti39Nb alloy and on evaporated layers of Ti, Nb and TiNb. Performance is compared to Ti6Al4V and pure Ti. This work is focused on the early stage of a bone growth process (studied in vitro). An investigation of this early stage has not been found in any available literature. At this early stage, CaHPO4 compound is formed. This compound is accompa- nied by Mg oxide formation. It is a difference to later stage of this process (as observed in many studies) where the layer is created solely by hydroxylapatite, Ca10(PO4)6(OH)2. The thermal oxidation of surface leads to a grain structure and to a rougher surface. The surface with different roughness effects growth rate depending on material. Generally, the best performance is achieved with TiNb (only polished as well as subsequently thermally oxidized), followed by Ti. 1
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