Publication detail

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.

Original Title

Fabrication and characterization of DLC coated microdimples on hip prosthesis heads

Type

journal article in Web of Science

Language

English

Original Abstract

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.

Keywords

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

Authors

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

RIV year

2014

Released

1. 7. 2015

Publisher

Wiley Periodicals, Inc.

Location

USA

ISBN

1552-4973

Periodical

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

Year of study

103

Number

5

State

United States of America

Pages from

1002

Pages to

1012

Pages count

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"
}