Laser treatment of plasma sprayed HA coatings

被引：27

作者：

Khor, KA

Vreeling, A

Dong, ZL

Cheang, P

机构：

[1] Nanyang Technol Univ, Sch Mech & Prod Engn, Singapore 639798, Singapore

[2] Univ Groningen, Dept Appl Phys, NL-9747 AG Groningen, Netherlands

[3] Nanyang Technol Univ, Sch Appl Sci, Singapore 639798, Singapore

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1999年 / 266卷 / 1-2期

关键词：

hydroxyapatite; bioceramics; plasma spray; amorphous; crystallinity; laser treatment;

D O I：

10.1016/S0921-5093(99)00049-0

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Laser treatment was conducted on plasma sprayed hydroxyapatite (HA) coatings using a Nd-YAG pulse laser. Various laser parameters were investigated. The results showed that the HA surface melted when an energy level of greater than or equal to 2 J and a spot size of 2 mm was employed during continuous scanning. The melted structure displayed a multi-layered porous structure. The size range of these pores was about 30-150 mu m. These pores have the propensity to promote osseo-induction. However, when the spot size was increased to 3 mm, the coating was found to display melted structure at energy levels of >6 J. XRD results for the laser treated coating showed increased crystallinity of the HA phase. Favourable amount of crystalline HA was found when the laser pulse energy < 5 J and a laser spot size of 3 mm was employed. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：1 / 7

页数：7

共 22 条

[1] RESIDUAL-STRESS MEASUREMENT IN THERMAL SPRAYED HYDROXYAPATITE COATINGS [J].