The High performance of nanocrystalline CVD diamond coated hip joints in wear simulator test
authors Maru, MM; Amaral, M; Rodrigues, SP; Santos, R; Gouvea, CP; Archanjo, BS; Trommer, RM; Oliveira, FJ; Silva, RF; Achete, CA
nationality International
journal JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
author keywords Nanocrystalline CVD diamond; Wear simulation; Hip joint; Silicon nitride
keywords SILICON-NITRIDE; IN-VITRO; CERAMIC BEARINGS; ALUMINA; ARTHROPLASTY; REPLACEMENT; PROSTHESES; COATINGS; FILMS; SQUEAKING
abstract The superior biotribological performance of nanocrystalline diamond (NCD) coatings grown by a chemical vapor deposition (CVD) method was already shown to demonstrate high wear resistance in ball on plate experiments under physiological liquid lubrication. However, tests with a close-to-real approach were missing and this constitutes the aim of the present work. Hip joint wear simulator tests were performed with cups and heads made of silicon nitride coated with NCD of similar to 10 mu m in thickness. Five million testing cycles (Mc) were run, which represent nearly five years of hip joint implant activity in a patient For the wear analysis, gravimetry, profilometry, scanning electron microscopy and Raman spectroscopy techniques were used. After 0.5 Mc of wear test, truncation of the protruded regions of the NCD film happened as a result of a fine-scale abrasive wear mechanism, evolving to extensive plateau regions and highly polished surface condition (Ra < 10 nm). Such surface modification took place without any catastrophic features as cracking, grain pullouts or delamination of the coatings. A steady state volumetric wear rate of 0.02 mm(3)/Mc, equivalent to a linear wear of 0.27 mu m/Mc favorably compares with the best performance reported in the literature for the fourth generation alumina ceramic (0.05 mm(3)/Mc). Also, squeaking, quite common phenomenon in hard-on-hard systems, was absent in the present all-NCD system. (C) 2015 Elsevier Ltd. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 1751-6161
year published 2015
volume 49
beginning page 175
ending page 185
digital object identifier (doi) 10.1016/j.jmbbm.2015.05.005
web of science category Engineering, Biomedical; Materials Science, Biomaterials
subject category Engineering; Materials Science
unique article identifier WOS:000358270000016
  ciceco authors
  impact metrics
times cited (wos core): 7
journal impact factor (jcr 2016): 3.110
5 year journal impact factor (jcr 2016): 3.544
category normalized journal impact factor percentile (jcr 2016): 63.853
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