Improvement of chemical resistance of apatite/titanium composite coatings deposited by RF plasma-spraying: surface modification by chemical vapor deposition

被引：2
|
作者：
Inagaki, M [1 ]
Hozumi, A [1 ]
Okudera, H [1 ]
Yokogawa, Y [1 ]
Kameyama, T [1 ]
机构：
[1] Natl Ind Res Inst Nagoya, Ceram Technol Dept, Bioceram Lab, Kita Ku, Nagoya, Aichi 4628510, Japan
来源：
THIN SOLID FILMS | 2001年 / 382卷 / 1-2期
关键词：
chemical vapor deposition; monolayer; plasma processing and deposition; hydroxyapatite;
D O I：
10.1016/S0040-6090(00)01772-7
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The chemical resistance of plasma-sprayed hydroxyapatite (HA) coatings on titanium substrates was successfully improved by fluoroalkylsilane (FAS), that is. 1H,1H,2H,2H-perfluorodecyltrimethoxysilane (FAS17) self-assembled monolayers (SAMs) formed through chemical vapor deposition. FAS17-SAMs were formed on the topmost HA layer of HA/Ti composite coatings prepared with rf input powers of 12, 17 or 27 kW. Each sample was immersed in a pH 6 buffer solution and its solubility investigated by an ion chromatography. All of the FAS17-coated samples became very hydrophobic with contact angles of more than 130 degrees. The total amount of Ca2+ ions released from the FAS17-coated HA surface decreased in comparison with the samples not coated with FAS17. In addition, the amount of Ca2+ ions released was significantly influenced by the base HA coatings. Scanning electron microscopic observation showed less damage on the FAS17-coated surfaces even after 12 weeks' immersion in the acidic solution, demonstrating that the effectively protected the underlying HA layer. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：69 / 73
页数：5
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