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

Result code in 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>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

JJ - Other materials

OECD FORD branch

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Project

<a href="/en/project/LO1207" target="_blank" >LO1207: Support of Sustainability of the Innovation Centre of Diagnostics and Applications of Materials at CTU-FME in Prague</a><br>

Continuities

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

Publication year

2016

Confidentiality

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

Name of the periodical

Mechanics, Materials Science & Engineering Journal

ISSN

2412-5954

e-ISSN

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Volume of the periodical

6

Issue of the periodical within the volume

september

Country of publishing house

AT - AUSTRIA

Number of pages

11

Pages from-to

1-11

UT code for WoS article

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EID of the result in the Scopus database

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