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 ≥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 μm. 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.
| Original language | English |
|---|---|
| Pages (from-to) | 1-7 |
| Number of pages | 7 |
| Journal | Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing |
| Volume | 266 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - Jun 30 1999 |
| Externally published | Yes |
ASJC Scopus Subject Areas
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
Keywords
- Amorphous
- Bioceramics
- Crystallinity
- Hydroxyapatite
- Laser treatment
- Plasma spray