Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 1-7 |
| Number of pages | 7 |
| Journal | Materials science and engineering a-Structural materials properties microstructure and processing |
| Volume | 266 |
| Issue number | 1-2 |
| Publication status | Published - 30-Jun-1999 |
Keywords
- hydroxyapatite
- bioceramics
- plasma spray
- amorphous
- crystallinity
- laser treatment
- PHOSPHATE CERAMIC COATINGS
- HYDROXYAPATITE COATINGS
- POROUS TITANIUM
- COATED IMPLANTS
- DEPOSITION