Deposition of hydroxyl-apatite on titanium subjected to electrochemical plasma coating

Title
Deposition of hydroxyl-apatite on titanium subjected to electrochemical plasma coating
Author(s)
신기룡[신기룡]윤상일[윤상일]고영건신동혁[신동혁]
Keywords
MICRO-ARC OXIDATION; ELECTROLYTIC OXIDATION; ELECTROPHORETIC DEPOSITION; HYDROXYAPATITE COATINGS; OXIDE-FILMS; ALLOY; LAYER; SUBSTRATE; SCIENCE
Issue Date
201310
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
ELECTROCHIMICA ACTA, v.109, pp.173 - 180
Abstract
This work investigated the direct deposition of hydroxyl-apatite (HA) on pure titanium via an electrochemical plasma (EP) coating. For this purpose, the EP coatings were deposited at 200 mA/cm(2) for 900 s in HA-containing electrolytes with and without tripotassium phosphate (K3PO4). At the onset of the ignition phenomenon during the EP coatings, the HA particles began to nucleate on the titanium sample due to the electrophoresis of the negatively charged HA particles in both electrolytes. The amounts of Ca and P in the coating layer produced in the electrolyte without K3PO4 was higher than that in the electrolyte with K3PO4 since the HA coating layer grew without a transformation in case of the electrolyte without K3PO4. In contrast, most HA particles in the coating layer of the electrolyte with K3PO4 decomposed readily to alpha-, beta-tricalcium phosphate (Ca-3(PO4)(2)) and calcium titanate (CaTiO3) compounds with the aid of the plasma-assisted electrochemical reactions found between the HA particles and phosphate ions or titanium oxide. Immersion tests in a simulated body fluid solution showed that the titanium samples coated with the biochemically stable HA particles, which were formed in the electrolyte without K3PO4, exhibited the accelerated growth of biomimetic apatite. (C) 2013 Elsevier Ltd. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/28807http://dx.doi.org/10.1016/j.electacta.2013.07.040
ISSN
0013-4686
Appears in Collections:
공과대학 > 신소재공학부 > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE