NANOMECHANICAL TESTING OF AN A-C:N NANOLAYER PREPARED BY ION BEAM ASSISTED DEPOSITION ON TI6AL4V ALLOY

1 VLCAK Petr
Co-authors:
1 SEPITKA Josef 1 HORAZDOVSKY Tomas 2 JIRKA Ivan 3 GREGORA Ivan 1 NEMEC Michal
Institutions:
1 Faculty of Mechanical Engineering, Czech Technical University in Prague, Czech Republic, EU.
2 J. Heyrovský Institute of Physical Chemistry, Acad. Sci. CR, v.v.i., Czech Republic, EU.
3 Institute of Physics, Academy of Sciences of the Czech Republic, Czech Republic, EU.
Conference:
7th International Conference on Nanomaterials - Research & Application, Hotel Voronez I, Brno, Czech Republic, EU, October 14th - 16th 2015
Proceedings:
Proceedings 7th International Conference on Nanomaterials - Research & Application
Pages:
68-72
ISBN:
978-80-87294-59-8
ISSN:
2694-930X
Published:
11th January 2016
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
115 views / 43 downloads
Abstract

It is well known that carbon-based materials have large variance in hardness. There are several methods for modifying the properties and improving the hardness of carbon-based layers. We applied ion beam assisted deposition for preparing a-C:N nanolayers on Ti6Al4V alloy. A Hysitron TI 950 TriboIndenter™ nanomechanical test instrument was used to assess the depth profiles of the mechanical properties on modified titanium substrates. Two methods were employed in the measurements: a) quasistatic partial unload, and b) dynamic Continuous Measurement of X (CMX). We obtained comparable results from both methods. The average nanoindentation hardness increased from HIT ~ 5GPa for a reference sample to HIT ~ 8.6 GPa for a sample coated by an a-C nanolayer, and to HIT ~ 11.5 GPa for a sample coated by an a-C:N nanolayer. The average storage modulus of the sample coated by a-C:N increased from E´~130 GPa (reference sample) to E´~155 GPa. The storage modulus of the sample coated by the a-C nanolayer was less than the storage modulus of the titanium substrate.

Keywords: Nanolayer, Nanohardness, Nanoindentation

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