Nanostructure Formation in Anodic Films Prepared on a β Alloy Ti39Nb PVD Layer

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F16%3A00234422" target="_blank" >RIV/68407700:21220/16:00234422 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Nanostructure Formation in Anodic Films Prepared on a β Alloy Ti39Nb PVD Layer

Popis výsledku v původním jazyce

Ti alloys are widely used for construction of bone implants. Some of them can be prepared without any toxic elements containing only Nb, Zr and Ta. At suitable com-position they have the beta (BCC) structure with low modulus of elasticity and high corrosion resistance. The oxidation of their surface can increase the biocompatibility and enable the preparation of nanostructured surface morphology. Methods The β-alloy Ti39wt.%Nb alloy prepared by arc-melting of Ti and Nb powders (ingot, 99.55%, Frankstahl, Austria, ingot, 99.85%, TIC, Brussels, Belgium) was melted eight times by electric discharge, annealed at 850 °C for 30 minutes and quenched to water. The substrates of the TiNb layers were prepared from bulk Ti39Nb and comercial cpTi and Ti6Al4V. They were cut using a SiC cutting wheel, ground with abrasive papers and then polished with a suspension of colloidal SiC (Colloidal Sillicat, Leco, CR). The TiNb layers were prepared by cathodic sputtering in a Hauser Flexicoat 850 unit (Hauser, Netherlands). The thickness of the TiNb layer was measured by Calotest (CSM, Switzerland). Surface roughness was measured by a Hommel T1000 Basic roughness tester (Jenaoptic, Germany). The sample surface was observed by a JSM7600F scanning electron microscope (JEOL Ltd, Japan). Samples were anodically oxidized in (NH4)2SO4 + 0,5wt%NH4F electrolyte at DC voltages 10, 20 and 30 V . Results The morphology of the nanostructured surface of a PVD layer depends particularly on the oxidation voltage and time, but also on the type of substrate. The surface morphology containing nanotubes appeared only on TiNb layer with a TiAlV sub-strate prepared at certain oxidation voltage and time. Conclusions The morphology of oxidized layers is heavily influenced by substrate material even though the surface roughness of PVD layer and substrate is identical for all oxidation processes.

Název v anglickém jazyce

Nanostructure Formation in Anodic Films Prepared on a β Alloy Ti39Nb PVD Layer

Popis výsledku anglicky

Ti alloys are widely used for construction of bone implants. Some of them can be prepared without any toxic elements containing only Nb, Zr and Ta. At suitable com-position they have the beta (BCC) structure with low modulus of elasticity and high corrosion resistance. The oxidation of their surface can increase the biocompatibility and enable the preparation of nanostructured surface morphology. Methods The β-alloy Ti39wt.%Nb alloy prepared by arc-melting of Ti and Nb powders (ingot, 99.55%, Frankstahl, Austria, ingot, 99.85%, TIC, Brussels, Belgium) was melted eight times by electric discharge, annealed at 850 °C for 30 minutes and quenched to water. The substrates of the TiNb layers were prepared from bulk Ti39Nb and comercial cpTi and Ti6Al4V. They were cut using a SiC cutting wheel, ground with abrasive papers and then polished with a suspension of colloidal SiC (Colloidal Sillicat, Leco, CR). The TiNb layers were prepared by cathodic sputtering in a Hauser Flexicoat 850 unit (Hauser, Netherlands). The thickness of the TiNb layer was measured by Calotest (CSM, Switzerland). Surface roughness was measured by a Hommel T1000 Basic roughness tester (Jenaoptic, Germany). The sample surface was observed by a JSM7600F scanning electron microscope (JEOL Ltd, Japan). Samples were anodically oxidized in (NH4)2SO4 + 0,5wt%NH4F electrolyte at DC voltages 10, 20 and 30 V . Results The morphology of the nanostructured surface of a PVD layer depends particularly on the oxidation voltage and time, but also on the type of substrate. The surface morphology containing nanotubes appeared only on TiNb layer with a TiAlV sub-strate prepared at certain oxidation voltage and time. Conclusions The morphology of oxidized layers is heavily influenced by substrate material even though the surface roughness of PVD layer and substrate is identical for all oxidation processes.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JJ - Ostatní materiály

OECD FORD obor

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Projekt

<a href="/cs/project/LO1207" target="_blank" >LO1207: Podpora udržitelnosti Inovačního centra diagnostiky a aplikace materiálů na ČVUT-FS v Praze</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Mechanics, Materials Science & Engineering Journal

ISSN

2412-5954

e-ISSN

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Svazek periodika

6

Číslo periodika v rámci svazku

september

Stát vydavatele periodika

AT - Rakouská republika

Počet stran výsledku

11

Strana od-do

1-11

Kód UT WoS článku

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EID výsledku v databázi Scopus

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