Stoichiometric transfer in pulsed laser deposition of hydroxylapatite

Hydroxylapatite (HA, Ca 10(PO 4) 6(OH) 2) is a calcium phosphate used as coating for dental and orthopaedical implants because its composition and structure is similar to the mineral part of bone. As an alternative to traditional plasma sprayed coating technique, pulsed laser deposition (PLD) has be...

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Bibliographic Details
Published in:Applied surface science 2000-02, Vol.154, p.434-438
Main Authors: Arias, J.L, Mayor, M.B, Pou, J, León, B, Pérez-Amor, M
Format: Article
Language:English
Subjects:
Hydroxylapatite
Pulsed laser deposition
Stoichiometric transfer
Surface modification
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Summary:Hydroxylapatite (HA, Ca 10(PO 4) 6(OH) 2) is a calcium phosphate used as coating for dental and orthopaedical implants because its composition and structure is similar to the mineral part of bone. As an alternative to traditional plasma sprayed coating technique, pulsed laser deposition (PLD) has been applied due to its ability to reproduce complex stoichiometries. A hydroxylapatite target was ablated with an ArF laser in a water vapor atmosphere to investigate in which range of fluences the stoichiometric transfer to a titanium substrate is possible. The Ca/P ratio of the coatings was measured by energy dispersive spectroscopy (EDS), while their OH − and CO 3 2− content was evaluated by Fourier transform infrared spectroscopy (FT-IR) spectroscopy. The irradiated target surface was analyzed by scanning electron microscopy (SEM) and the ablation rate measured with a profilometer. While at higher fluences all the target material is congruently ablated and stoichiometry is transferred to the coatings, at lower fluences (
ISSN:0169-4332
1873-5584
DOI:10.1016/S0169-4332(99)00457-2