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Choudhury, D. Morita, T. Sawae, Y. Lackner, JM. Towler, M. Krupka, I.
Original Title
A novel functional layered diamond like carbon coating for orthopedics applications
Type
journal article in Web of Science
Language
English
Original Abstract
Functional Layered "Diamond like Carbon (DLC)" coated interfaces for orthopedic load bearing applications were fabricated and assessed. They consisted of three layers, each designed for specific functions. The fabrication process was performed using magnetron sputtering at low temperatures on steel substrates. Structural investigations showed the layers possessed very fine grained, columnar microstructures with a very low density of inter columnar micro-cracks. The mechanical and surface properties such as micro hardness, wettability, roughness, modulus of elasticity, water contact angle and absorbed protein layer (gamma-globulin) varied among the DLCs. The biotribological tests, conducted under simulated hip joint conditions (friction, wear, Raman intensity ratio and polyethylene wear debris) were correlated with their surface and material properties. The DLC (sample no #ML1), which were built with 0.6 mu m thick tribological layer (a-C:H:Cr-a-C:16 bilayers, ratio: 1:1) and 0.15 mu m thin (a-C:H) top layer was found to yield superior tribological performances at "DLC on Polyethylene" sliding pairs. On the other hand, DLC (sample no#GL3), which consist of 0.6 pm thick tribological layer (gradient layer a-C:H > a-C:N) and 0.15 pm thin (a-C:H) top layer was found to yield finest tribological performances at "DLC on DLC" sliding pairs.
Keywords
Diamond-like carbon; Protein adsorption; Tribo-corrosion; Friction; orthopedics implant
Authors
Choudhury, D.; Morita, T.; Sawae, Y. ; Lackner, JM. ; Towler, M. ; Krupka, I.
Released
1. 1. 2016
ISBN
0925-9635
Periodical
Diamond and Related Materials
Year of study
61
Number
1
State
Kingdom of the Netherlands
Pages from
56
Pages to
69
Pages count
14
BibTex
@article{BUT143161, author="Choudhury, D. and Morita, T. and Sawae, Y. and Lackner, JM. and Towler, M. and Krupka, I.", title="A novel functional layered diamond like carbon coating for orthopedics applications", journal="Diamond and Related Materials", year="2016", volume="61", number="1", pages="56--69", doi="10.1016/j.diamond.2015.11.011", issn="0925-9635" }