Use of diamond-like carbon with tungsten (W-DLC) films as biocompatible material

Diamond-like carbon (DLC), also known as amorphous hydrogenated carbon (a-C:H), are a class of materials with excellent mechanical, tribological and biological properties. When the DLC films are enhanced with other elements, all of these properties can be changed within a certain range. In this work...

Full description

Saved in:

Bibliographic Details
Published in:	Surface & coatings technology Vol. 202; no. 12; pp. 2813 - 2816
Main Authors:	Mansano, R.D., Ruas, R., Mousinho, A.P., Zambom, L.S., Pinto, T.J.A., Amoedo, L.H., Massi, M.
Format:	Journal Article
Language:	English
Published:	Lausanne Elsevier B.V 15-03-2008 Elsevier
Subjects:	Applied sciences Biocompatibility Cross-disciplinary physics: materials science; rheology DLC films Exact sciences and technology Materials science Metals. Metallurgy Methods of deposition of films and coatings; film growth and epitaxy New materials Physics Production techniques Sputtering deposition Surface treatment Surface treatments W-DLC DLC films Biocompatibility Sputtering deposition W-DLC New materials Thin films Synthetic diamond Surface treatments Diamond structure Carbon Sputtering
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	Diamond-like carbon (DLC), also known as amorphous hydrogenated carbon (a-C:H), are a class of materials with excellent mechanical, tribological and biological properties. When the DLC films are enhanced with other elements, all of these properties can be changed within a certain range. In this work, reactive magnetron sputtering was used to deposit W-DLC (hydrogenated tungsten carbide) films on Ti6Al4V (implant material). Many films were made using pure tungsten (99.99%) target and different plasmas processes, with different ratio among argon and methane. It was possible to change the films composition (from pure amorphous carbon to carbon enhanced with tungsten) according to ratio of argon and methane plasma. Between all films processed, the carbon films enhanced with tungsten showed good results in the “in vitro” cytotoxicity testing. Raman spectroscopy was used to analyze the chemical bonds kinds and the chemical bonds quantities. The Rutherford Back Scattering (RBS) was used to analyze the films compositions. The chemical inertness was analyzed by scanning voltametry. W-DLC thin films obtained in these processes have low roughness, high chemical resistance, good adhesion and show a high biocompatibility, when compared with common DLC thin films. Hence we have concluded that the tungsten concentrations in the DLC films make an important role to improve the properties of the DLC layers.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 ObjectType-Article-2 ObjectType-Feature-1
ISSN:	0257-8972 1879-3347
DOI:	10.1016/j.surfcoat.2007.10.012