Publication detail
A novel tribological study on DLC-coated micro-dimpled Orthopedics implant interface
CHOUDHURY, D. URBAN, F. VRBKA, M. HARTL, M. KŘUPKA, I.
Czech title
Tribologická studie povrchů umělých náhrad kloubů s modifikovanou topografií a DLC vrstvou
English title
A novel tribological study on DLC-coated micro-dimpled Orthopedics implant interface
Type
journal article in Web of Science
Language
en
Original abstract
Článek se zabývá tribologickou analýzou třecích povrchů kyčelní náhrady, které mají modifikovanou topografii a je na ně aplikován DLC povlak. Je porovnáván součinitel tření, který je získán na základě měření pomocí simulátoru kyčelního kloubu na principu kyvadla.
Czech abstract
This study investigates a tribological performance of diamond like carbon (DLC) coated micro dimpled prosthesis heads against ceramic cups in a novel pendulum hip joint simulator. The simulator enables determining friction coefficient and viscous effects of a concave shaped specimen interface (conformal contact). Two types of DLC such as hydrogenated amorphous carbon (a-C:H) and tetrahedral amorphous carbon (Ta-C) and one set of micro dimple (diameter of 300 um, depth of 70 um, and pitch of 900 um) were fabricated on metallic prosthesis heads. The experiment results reveal a significant friction coefficient reduction to the dimpled a-C:H /ceramic prosthesis compared to a Metal (CoCr)/ceramic prosthesis because of their improved material and surface properties and viscous effect. The postexperiment surface analysis displays that the dimpled a C:H yielded a minor change in the surface roughness, and generated a larger sizes of wear debris (40-200 nm sized, equivalent diameter), a size which could be certainly stored in the dimple, thus likely to reducing their possible third body abrasive wear rate. Thus, dimpled a:C-H can be used as a metal on ceramic hip joint interface, whereas the simulator can be utilized as an advanced bio-tribometer.
English abstract
Článek se zabývá tribologickou analýzou třecích povrchů kyčelní náhrady, které mají modifikovanou topografii a je na ně aplikován DLC povlak. Je porovnáván součinitel tření, který je získán na základě měření pomocí simulátoru kyčelního kloubu na principu kyvadla.
Keywords in Czech
Endoprotéza kyčelního kloubu; součinitel tření; částice opotřebení; DLC vrstva; mikro-důlek
Keywords in English
Hip joint prosthesis; Friction coefficient; Wear debris; Diamond like carbon; Micro dimple
RIV year
2015
Released
09.02.2015
Publisher
Elsevier Ltd.
Location
United Kingdom
ISSN
1751-6161
Volume
2015
Number
45
Pages from–to
121–131
Pages count
11
BIBTEX
@article{BUT112733,
author="Dipankar {Choudhury} and Filip {Urban} and Martin {Vrbka} and Martin {Hartl} and Ivan {Křupka},
title="A novel tribological study on DLC-coated micro-dimpled Orthopedics implant interface",
year="2015",
volume="2015",
number="45",
month="February",
pages="121--131",
publisher="Elsevier Ltd.",
address="United Kingdom",
issn="1751-6161"
}