Bioceramic coating of hydroxyapatite on titanium substrate with Nd-YAG laser

被引：97

作者：

Cheng, GJ ^{[1
]}

Pirzada, D

Cai, M

Mohanty, P

Bandyopadhyay, A

机构：

[1] Washington State Univ, Sch Mech & Mat Engn, Pullman, WA 99164 USA

[2] Washington State Univ, Dept Phys, Pullman, WA 99164 USA

[3] Univ Michigan, Dept Mech Engn, Dearborn, MI 48128 USA

来源：

MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS | 2005年 / 25卷 / 04期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/j.msec.2005.05.002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The ability to bond to bone tissue is a unique property of bioactive ceramics. Hydroxyapatite (HAp) is one of the potential bioceramics candidates due to its superior bio-compatibility. Significant effort has been devoted to coat HAp ceramics on metallic substrates. Most of these processes, such as ion-beam sputter coating, thermal spraying, and flame spraying, are high temperature line of sight processes, which suffer from undesirable phase formation and weak metal/HAP bonding strength. This paper presents a unique process to coat HAp powders on titanium substrates at low temperature and enhance the coating/substrate interface by laser surface engineering. Nd-YAG laser transmits HAp powders and the laser power is absorbed by titanium substrate to produce a thin layer of molten region. During coating process, HAp powders are kept at low temperature before they are entrapped in metallic layer. Scanning electron microscope (SEM) was used to investigate the microstructure of coating; the chemical composition of the coating is determined by energy dispersive spectrometry (EDS). Mechanical properties of the interface between coating and Ti substrate were investigated by nanoindentation. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：541 / 547

页数：7

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