Publication detail
Effect of Slide-to-roll Ratio on Film Thickness Formation in Bovine Serum Lubricated Contact
LAŠTŮVKA, J. BOSÁK, D. NÁVRAT, T. VRBKA, M.
Czech title
Vliv skluzu na formování mazacího filmu v kontaktu s hovězím sérem
English title
Effect of Slide-to-roll Ratio on Film Thickness Formation in Bovine Serum Lubricated Contact
Type
conference paper
Language
en
Original abstract
The purpose of this study is to describe the effect of slide-to-roll ratio on the film formation and thickness in artificial CoCrMo metal femoral head and a glass disc contact lubricated with Bovine Serum. The experiment is carried out using an optical testing device and high speed camera capturing chromatic interferograms of the contact zone. The interferograms are evaluated using thin film colorimetric interferometry. The resulting film formation and thickness is studied as a function of time for three different slide-to-roll ratio values. Rolling showed formation of steadily increasing film up to thickness of 23 nm. The sliding test with ball faster than disc did not result in a significant film formation, only a thin film of 2 to 4 nm was formed. The other sliding test with disc faster than ball developed thinner base film of 4 to 20 nm and a thicker protein aggregation film of 60 to 120 nm.
Czech abstract
Cílem této studie bylo popsat efekt skluzového poměru na formování mazacího filmu v kontaktu CoCrMo hlavice se skleněným diskem. Experiment byl vykonán na optickém tribometru a do kontaktu bylo dodáváno hovězí sérum. Nasnímané interferogramy byly vyhodnoceny optickou kolorimetrickou interferometrií. Vyhodnocením byly získány tloušťky mazacího filmu jako funkcí času. Měření byly realizovány pro čisté valení pro různé hodnoty skluzu. Z výsledků je patrné, že při valení se tloušťka filmu postupně zvětšuje až na 23 nm. V případě skluzu, kdy je povrch hlavice rychlejší než povrch disku dosahuje tloušťka několika nanometrů. V opačném případě nejdříve tloušťka narůstá až na 120 nm a poté klesá na 4 až 20 nm.
English abstract
The purpose of this study is to describe the effect of slide-to-roll ratio on the film formation and thickness in artificial CoCrMo metal femoral head and a glass disc contact lubricated with Bovine Serum. The experiment is carried out using an optical testing device and high speed camera capturing chromatic interferograms of the contact zone. The interferograms are evaluated using thin film colorimetric interferometry. The resulting film formation and thickness is studied as a function of time for three different slide-to-roll ratio values. Rolling showed formation of steadily increasing film up to thickness of 23 nm. The sliding test with ball faster than disc did not result in a significant film formation, only a thin film of 2 to 4 nm was formed. The other sliding test with disc faster than ball developed thinner base film of 4 to 20 nm and a thicker protein aggregation film of 60 to 120 nm.
Keywords in Czech
Umělý kyčelní kloub, biotrobologie, hovězí sérum, kovová femorální komponenta
Keywords in English
Artificial hip joint, Biotribology, Bovine serum, Metal femoral head
RIV year
2012
Released
04.06.2012
Publisher
Czech Technical University in Prague
Location
Praha
ISBN
978-80-01-05060-6
Book
Proceedings of the 50th Anuual Conference on Experimental Stress Analysis
Edition number
1
Pages from–to
247–252
Pages count
6
BIBTEX
@inproceedings{BUT92672,
author="Jan {Laštůvka} and Dalibor {Bosák} and Tomáš {Návrat} and Martin {Vrbka},
title="Effect of Slide-to-roll Ratio on Film Thickness Formation in Bovine Serum Lubricated Contact",
booktitle="Proceedings of the 50th Anuual Conference on Experimental Stress Analysis",
year="2012",
month="June",
pages="247--252",
publisher="Czech Technical University in Prague",
address="Praha",
isbn="978-80-01-05060-6"
}