Detail publikace

Fabrication and characterization of DLC coated microdimples on hip prosthesis heads

CHOUDHURY, D. CHING, H.A. MAMAT, A.B. ČÍŽEK, J. ABU OSMAN, N.A. VRBKA, M. HARTL, M. KŘUPKA, I.

Originální název

Fabrication and characterization of DLC coated microdimples on hip prosthesis heads

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

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.

Klíčová slova

surface modification; micro dimple; diamond like carbon; hip prosthesis; implant interface

Autoři

CHOUDHURY, D.; CHING, H.A.; MAMAT, A.B.; ČÍŽEK, J.; ABU OSMAN, N.A.; VRBKA, M.; HARTL, M.; KŘUPKA, I.

Rok RIV

2014

Vydáno

1. 7. 2015

Nakladatel

Wiley Periodicals, Inc.

Místo

USA

ISSN

1552-4973

Periodikum

Journal of biomedical materials research. Part B, Applied biomaterials (Print)

Ročník

103

Číslo

5

Stát

Spojené státy americké

Strany od

1002

Strany do

1012

Strany počet

11

URL

http://onlinelibrary.wiley.com/doi/10.1002/jbm.b.33274/abstract

BibTex

@article{BUT109778,
  author="CHOUDHURY, D. and CHING, H.A. and MAMAT, A.B. and ČÍŽEK, J. and ABU OSMAN, N.A. and VRBKA, M. and HARTL, M. and KŘUPKA, I.",
  title="Fabrication and characterization of DLC coated microdimples on hip prosthesis heads",
  journal="Journal of biomedical materials research. Part B, Applied biomaterials (Print)",
  year="2015",
  volume="103",
  number="5",
  pages="1002--1012",
  doi="10.1002/jbm.b.33274",
  issn="1552-4973",
  url="http://onlinelibrary.wiley.com/doi/10.1002/jbm.b.33274/abstract"
}