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Information × Registration Number 0211U005824, 0109U000455 , R & D reports Title Conformity to lows of biocompatible protective coatings formation on Ti- and Fe-alloys to artificial and medical instrument popup.stage_title Head Sidorenko Sergey, Доктор фізико-математичних наук Registration Date 12-12-2011 Organization Faculty of аircraft and space systems NTUU "KPI" popup.description2 3. The complex of experimental research studies in surface modification was carried out with a purpose of creation of biocompatible coatings. The results of research gave the opportunity to figure out influence of vacuum ion-plasma surface treatment conditions, regime of electro-spark alloying and laser treatment on microhardness, microstructure, phase and chemical composition of near-surface layers in model alloys of Ti-Al and Fe-Al, titanium alloy ВТ1-0 and steel. The possibility to use a phenomenon of ascending diffusion in order to increase aluminum concentration on the surface of model binary alloys of Ti-Al and Fe-Al systems (as a result of ion bombardment with argon during ion-plasma treatment) was shown. Ion bombardment is basic method to form biocompatible coating with high adhesion. High adhesion strength is possible due to the ascending diffusion of alloying element - aluminum (the main element of coating) from the specimen volume, where it forms solid solution, to the surface, where it is observed as a thin transitional layer, strongly bound with a lattice of bulk material. Subsequent oxidation causes a formation of aluminum oxide coating (Аl2О3), which has high adhesion strength with bulk material as well. An ascending diffusion is oppositely directed to the flow of radiation-induced defects that appear on the surface as a result of surface bombardment with ions of inert gas. The parameters and scheme of apparatuses for ion-plasma treatment were figured out. Complex methods were developed for creation of biocompatible coatings on the base of aluminum, zirconium and titanium oxides under the high-energy impulse influence - electro-spark alloying and laser surface treatment of ВТ1-0 titanium alloy which is used for implant production. It was determined that structural changes in near-surface layer of steel after electro-spark alloying with aluminum and zirconium result in the increase of microhardness up to 4,5-14 GPa. Product Description popup.authors Іващенко Євген Вадимович Лобанов Валентин Іванович Сидоренко Сергій Іванович popup.nrat_date 2020-04-02 Close