Morphology and dissolution rate of wear debris from silicon nitride coatings
2016 (English)In: ACS Biomaterials Science & Engineering, ISSN 2373-9878, Vol. 2, no 6, 998-1004 p.Article in journal (Refereed) Published
Silicon nitride (SiNx) coatings have recentlY been introduced as a potential material for joint implant bearing surfaces, but there is no data on wear debri morphology nor their dissolution rate, something that could play a central role to implant longevity. In this study, wear debris was generated in a ball-on-disc setup in simulated body fluid. After serum digestion the debris was analyzed with scanning electron microscopy and energy-dispersive X-ray spectroscopy. The particle dissolution rate was evaluated using inductively coupled plasma techniques, on model SiNx particlEs. The wear debris from SiNx coatings was found to be round, in the nm range and formed agglomerates in the submicrometer to micrometer range. Model particles dissolved in simulated body fluid at a rate of: c(t) = 39.45[1 - exp(-1.11 X 10(-6) t], where [c(t)] = mg/L and [t] = s. This study can be used as a preliminary prediction of size, shape, and dissolution rate of wear debris from SiNx coatings.
Place, publisher, year, edition, pages
2016. Vol. 2, no 6, 998-1004 p.
wear, debris, silicon nitride, coatings, hip joint replacement, dissolution, particles
Materials Engineering Medical Materials
Research subject Engineering Science with specialization in Materials Science
IdentifiersURN: urn:nbn:se:uu:diva-247793DOI: 10.1021/acsbiomaterials.6b00133ISI: 000377925300013OAI: oai:DiVA.org:uu-247793DiVA: diva2:797474
FunderEU, FP7, Seventh Framework Programme, 310477
This document is the Accepted Manuscript version of a Published Work that appeared in final form in [JournalTitle], copyright © American Chemical Society after peer review and technical editing by t he publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/acsbiomaterials.6b001332015-03-242015-03-242016-07-25Bibliographically approved