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Proceedings Paper

Influence of a TiN interlayer on the microstructure and mechanical properties of hydroxyapatite films grown by pulsed laser deposition
Author(s): Valentin D. Nelea; Carmen Ristoscu; Silviu Colis; Simona Arens; Herve Pelletier; Ion N. Mihailescu; Pierre Mille
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Paper Abstract

Crystalline hydroxyapatite (HA) thin films grown on metallic substrates is the best choice for bone restoration. This is due to the good biological compatibility of the hydroxyapatite material combined with the good mechanical characteristics of the substrates. We deposit HA thin films by Pulsed Laser Deposition (PLD) in vacuum at room temperature using a KrF* excimer laser ((lambda) equals 248 nm, (tau) FWHM >= 20 ns). The depositions were performed directly on Ti-5Al-2.5Fe or on substrates previously coated with a TiN buffer layer. The HA deposited structures were characterized by complementary techniques: GIXRD, SEM, TEM, SAED, EDS and nanoindentation. Properties of the HA films grown with and without the TiN buffer were discussed in term of microstructure and mechanical behavior. The films with interlayer preserve the stoichiometry, are completely recrystallized and present better mechanical characteristics as compared with those without buffer.

Paper Details

Date Published: 9 April 2001
PDF: 5 pages
Proc. SPIE 4397, 11th International School on Quantum Electronics: Laser Physics and Applications, (9 April 2001); doi: 10.1117/12.425156
Show Author Affiliations
Valentin D. Nelea, National Institute for Lasers, Plasma and Radiation Physics (Romania)
Carmen Ristoscu, National Institute for Lasers, Plasma and Radiation Physics (Romania)
Silviu Colis, Institut de Physique et Chimie des Materiaux de Strasbourg (France)
Simona Arens, National Institute for Lasers, Plasma and Radiation Physics (Romania)
Herve Pelletier, Ecole Nationale Superieure des Arts et Industries de Strasbourg (France)
Ion N. Mihailescu, National Institute for Lasers, Plasma and Radiation Physics (Romania)
Pierre Mille, Ecole Nationale Superieure des Arts et Industries de Strasbourg (France)


Published in SPIE Proceedings Vol. 4397:
11th International School on Quantum Electronics: Laser Physics and Applications

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