Karakterizacija mikrostrukture sinterirane titan-niobij legure za biomedicinsku primjenu

master's thesis

• Title (english): Characterization of microstructure of sintered titanium-niobium alloy for biomedical application
• Author: Gorana Domitrović
• Mentor: Ljerka Slokar Benić (mentor)
• Committee member: Stjepan Kožuh (predsjednik povjerenstva)
• Committee member: Ljerka Slokar Benić (član povjerenstva)
• Committee member: Martina Lovrenić-Jugović (član povjerenstva)
• Granter: University of Zagreb; Faculty of Metallurgy; Sisak
• Defense date and country: 2019-09-26, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Metallurgy

Abstract

Legure titana, zbog svojih povoljnih svojstava, pronalaze sve veću primjenu u
biomedicini. Međutim, zbog njihove visoke cijene, danas se sve više razvijaju i koriste nove
metode s ciljem proizvodnje ekonomičnijih legura. Stoga je u okivru ovog rada za
proizvodnju legure Ti80Nb20 korištena tehnologija metalurgije praha.
Istraživana titan-niobij legura pripravljena je iz elementarnih prahova miješanjem
odnosno mehaničkim legiranjem u kugličnom mlinu. Nakon toga je iz smjese izdvojeno 8
uzoraka koji su prešani na hidrauličnoj preši, te sinterirani u cijevnoj peći u zaštitnoj atomsferi
argona. Mikrostruktura sinteriranih uzoraka je karakterizirana različitim metodama kako bi se
utvrdili optimalni tehnološki parametri za postizanje mikrostrukture sa zadovoljavajućim
karakteristikama za primjenu u biomedicini.
Dobiveni rezultati pokazuju da je uz malu korekciju primijenjenih tehnoloških
parametara, u smislu produžavanja vremena miješanja/mehaničkog legiranja, primijenjenom
tehnologijom metalurgije praha moguće ekonomično proizvesti Ti80Nb20 leguru sa svojstvima
povoljnim za biomedicinsku primjenu.

Abstract (english)

Due to their favourably properties, titanium alloys are increasingly used in
biomedicine. However, because of their high cost, new methods are being developed and used
today to produce more economical alloys. Therefore, in the frame of this work, powder
metallurgy was used to produce Ti80Nb20 alloy.
The investigated titanium-niobium alloy was prepared from elemental powders by
mixing i.e. mechanical alloying in a ball mill. After that, 8 samples singled out from the
mixture were pressed on a hydraulic press and sintered in a tube furnace in a protective
atmosphere of argon. For the characterization of the microstructure of sintered samples
various methods were applied to determine the optimal technological parameters for
achieving microstructure with satisfactory characteristics for biomedical applications.
The obtained results show that with a small correction of the applied technological
parameters, in terms of time extension of mixing/mechanical alloying, it is possible to
economically produce Ti80Nb20 alloy with properties suitable for biomedical application by
using powder metallurgy technology.

• Keywords: legure titana; metalurgija praha; mikrostruktura; tvrdoća
• Keywords (english): titanium alloys; powder metallurgy; microstructure; hardness
• Language: croatian
• URN:NBN: urn:nbn:hr:115:377325
• Study programme: Title: Graduate study program Metallurgy; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka metalurgije (magistar/magistra inženjer/inženjerka metalurgije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2019-10-11 11:08:30