Title of article
Laser treatment of plasma sprayed HA coatings
Author/Authors
Khor، نويسنده , , K.A and Vreeling، نويسنده , , A and Dong، نويسنده , , Z.L and Cheang، نويسنده , , P، نويسنده ,
Pages
7
From page
1
To page
7
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.
Keywords
crystallinity , Laser treatment , Hydroxyapatite , Bioceramics , plasma spray , Amorphous
Journal title
Astroparticle Physics
Record number
2054769
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