Detail publikace
Aplikace mikrovtisků a DLC vrstev na hlavice kyčelních endoprotéz
CHOUDHURY, D. CHING, H.A. MAMAT, A.B. ČÍŽEK, J. ABU OSMAN, N.A. VRBKA, M. HARTL, M. KŘUPKA, I.
Český název
Aplikace mikrovtisků a DLC vrstev na hlavice kyčelních endoprotéz
Anglický název
Fabrication and characterization of DLC coated microdimples on hip prosthesis heads
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
en
Originální abstrakt
Diamond like carbon (DLC) is applied as a thin film onto substrates to obtain desired surface properties such as increased hardness and corrosion resistance, and decreased friction and wear rate. Microdimple is an advanced surface modification technique enhancing the tribological performance. In this study, DLC coated microdimples were fabricated on hip prosthesis heads and their mechanical, material and surface properties were characterized. An Electro discharge machining (EDM) oriented microdrilling was utilized to fabricate a defined microdimple array on stainless steel (SS) hip prosthesis heads. The dimpled surfaces were then coated by hydrogenated amorphous carbon (a-C:H) and tetrahedral amorphous carbon (Ta-C) layers by using a magnetron sputtering technology. A preliminary tribology test was conducted on these fabricated surfaces against a ceramic ball in simulated hip joint conditions. It was found that the fabricated dimples were perpendicular to the spherical surfaces and no cutting-tools wear debris was detected inside the individual dimples. The a-C:H and Ta-C coatings increased the hardness at both the dimple edges and the nondimpled region. The tribology test showed a significant reduction in friction coefficient for coated surfaces regardless of microdimple arrays: the lowest friction coefficient was found for the a-C:H samples, followed by Ta-C, as compared to the SS surface.
Český abstrakt
Článek se zabývá aplikací mikro-vtisků a DLC vrstev na třecí povrchy hlavic kyčelních endoprotéz. Jsou sledovány mechanické, materiálové a tribologické vlastnosti navržených úprav třecích povrchů. Tribologické testy prokázaly, že DLC vrstva významně snižuje součinitel tření kloubního páru.
Anglický abstrakt
Diamond like carbon (DLC) is applied as a thin film onto substrates to obtain desired surface properties such as increased hardness and corrosion resistance, and decreased friction and wear rate. Microdimple is an advanced surface modification technique enhancing the tribological performance. In this study, DLC coated microdimples were fabricated on hip prosthesis heads and their mechanical, material and surface properties were characterized. An Electro discharge machining (EDM) oriented microdrilling was utilized to fabricate a defined microdimple array on stainless steel (SS) hip prosthesis heads. The dimpled surfaces were then coated by hydrogenated amorphous carbon (a-C:H) and tetrahedral amorphous carbon (Ta-C) layers by using a magnetron sputtering technology. A preliminary tribology test was conducted on these fabricated surfaces against a ceramic ball in simulated hip joint conditions. It was found that the fabricated dimples were perpendicular to the spherical surfaces and no cutting-tools wear debris was detected inside the individual dimples. The a-C:H and Ta-C coatings increased the hardness at both the dimple edges and the nondimpled region. The tribology test showed a significant reduction in friction coefficient for coated surfaces regardless of microdimple arrays: the lowest friction coefficient was found for the a-C:H samples, followed by Ta-C, as compared to the SS surface.
Klíčová slova česky
modifikace povrchů; mikro-vtisk; DLC vrstva; endoprotéza kyčelního kloubu
Klíčová slova anglicky
surface modification; micro dimple; diamond like carbon; hip prosthesis; implant interface
Rok RIV
2014
Vydáno
01.07.2015
Nakladatel
Wiley Periodicals, Inc.
Místo
USA
ISSN
1552-4973
Ročník
103
Číslo
5
Strany od–do
1002–1012
Počet stran
11
BIBTEX
@article{BUT109778,
author="Dipankar {Choudhury} and Jan {Čížek} and Martin {Vrbka} and Martin {Hartl} and Ivan {Křupka},
title="Fabrication and characterization of DLC coated microdimples on hip prosthesis heads",
year="2015",
volume="103",
number="5",
month="July",
pages="1002--1012",
publisher="Wiley Periodicals, Inc.",
address="USA",
issn="1552-4973"
}