GEANTĂ Victor, VOICULESCU Ionelia, ŞTEFĂNOIU Radu BINCHICIU Horia, VIZUREANU Petrică, SANDU Andrei Victor, BĂLȚATU Simona, KELEMEN Hajnal, CODESCU Mirela Maria, MARINESCU Virgil
Inventors in Beirut International Innovation Show BIIS 2022
From
Romanian Inventors Forum
Overview
The present invention relates to a high metal entropy from the FeMoTaTiZr
system, consisting of elements with the lowest biotoxicity on the human body,
used in the medical field for orthopedic implants, characterized in that it has a very good biocompatibility, behavior appropriate to processing mechanical and high
mechanical strength in conditions of wear bone-alloy system, combined with
mechanical fatigue, as well as the process of obtaining it. The alloy with high entropy from the FeMoTaTiZr system, consists of elements with the lowest possible toxicity to the human body and which is the object of the invention, has high hardness and toughness, being composed of five metal elements of advanced purity, having chemical composition located in the value
ranges, as follows: Fe = 9.5 – 12.5%, Mo = 19 – 22%, Ta = 36 – 40%, Ti = 9 – 11.5%, Zr = 18 – 21% with a density of 10.8 – 12 kg / dm3 and a melting temperature of 2300 – 2400oC, material which before heat treatments (in the molded state) has average microd hardness values of 694 HV0.5, and after the application of specific heat treatments ( heating up to 900oC, stationary on the bearing for 2 hours, hardening in water) has an associated hardness of 800 HV0.5, being obtained by melting and homogenization in a vacuum spring remelting plant under a protective argon atmosphere.
