title: Characterization of calcium phosphate coatings deposited by Nd:YAG laser ablation at 355 nm: influence of thickness.
abstract: Calcium phosphate coatings were deposited by pulsed laser ablation with a radiation of 355 nm from a Nd:YAG laser. All the coatings were obtained at the same conditions, but deposition was stopped after different number of pulses to get coatings with different thickness. The influence of thickness in the structural and mechanical properties of the coatings was investigated. Coatings structure was characterised by scanning electron microscopy, grazing incidence X-ray diffractometry and Raman spectroscopy. The mechanical properties were evaluated by scratch test. The morphology of the coatings is dominated by the presence of droplets. The coatings are composed mainly of hydroxyapatite, alpha tricalcium phosphate and amorphous calcium phosphate. Thinner coatings withstand higher loads of failure in the scratch test.
authors: Departament de Física Aplicada i Optica, Universitat de Barcelona, Spain. jmfernandez@fao.ub.es
authors: J M
authors: JM
authors: Fernández-Pradas
authors: L
authors: L
authors: Clèries
authors: G
authors: G
authors: Sardin
authors: J L
authors: JL
authors: Morenza
mesh_terms: D001672:Biocompatible Materials / Q000494:pharmacology; D002130:Calcium Phosphates / Q000737:chemistry* / Q000378:metabolism*; D017886:Durapatite / Q000737:chemistry; D007834:Lasers; D008855:Microscopy, Electron, Scanning; D009354:Neodymium / Q000737:chemistry*; D013059:Spectrum Analysis, Raman; D013499:Surface Properties; D013696:Temperature; D013718:Tensile Strength; D014961:X-Ray Diffraction
chemical_list: D001672:Biocompatible Materials; D002130:Calcium Phosphates; C485828:alpha-tricalcium phosphate; C519480:amorphous calcium phosphate; C485817:beta-tricalcium phosphate; C485830:tetracalcium phosphate; D009354:Neodymium; C485838:calcium phosphate, monobasic, anhydrous; D017886:Durapatite; C020243:calcium phosphate; C018392:tricalcium phosphate; C485829:calcium phosphate, dibasic, anhydrous