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Hydroxyapatite coatings grown by pulsed laser deposition with a beam of 355 nm wavelength

Published online by Cambridge University Press:  31 January 2011

J. M. Fernández-Pradas ,
L. Clèries ,
G. Sardin  and
J. L. Morenza
J. M. Fernández-Pradas*
Affiliation:
Universitat de Barcelona, Departament de Física Aplicada i Òptica, Av. Diagonal 647, E-08028 Barcelona, Spain
L. Clèries
Affiliation:
Universitat de Barcelona, Departament de Física Aplicada i Òptica, Av. Diagonal 647, E-08028 Barcelona, Spain
G. Sardin
Affiliation:
Universitat de Barcelona, Departament de Física Aplicada i Òptica, Av. Diagonal 647, E-08028 Barcelona, Spain
J. L. Morenza
Affiliation:
Universitat de Barcelona, Departament de Física Aplicada i Òptica, Av. Diagonal 647, E-08028 Barcelona, Spain
*
a)Author to whom correspondence should be addressed. e-mail: [email protected]
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Abstract

Calcium phosphate coatings, obtained at different deposition rates by pulsed laser deposition with a Nd:YAG laser beam of 355 nm wavelength, were studied. The deposition rate was changed from 0.043 to 1.16 Å/shot by modification of only the ablated area, maintaining the local fluence constant to perform the ablation process in similar local conditions. Characterization of the coatings was performed by scanning electron microscopy, x-ray diffractometry, and infrared, micro-Raman, and x-ray photoelectron spectroscopy. The coatings showed a compact surface morphology formed by glassy grains with some droplets on them. Only hydroxyapatite (HA) and alpha-tricalcium phosphate (α–TCP) peaks were found in the x-ray diffractograms. The relative content of (α–TCP diminished with decreasing deposition rates, and only HA peaks were found for the lowest rate. The origin of (α–TCP is discussed.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 12 , December 1999 , pp. 4715 - 4719
Copyright
Copyright © Materials Research Society 1999

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References

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