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"
}