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2008-02-07 - Article/Dans un journal avec peer-review - Anglais - 7 page(s)

Snyders Rony , Boussser E., Music D., Hocquet S., Jensen J., Schneider J-M., "Influence of the Chemical Composition on the Phase Constitution and the Elastic Properties of RF-Sputtered Hydroxyapatite Coatings" in Plasma Processes and Polymers, 5, 2, 168-174

  • Edition : Wiley, Weinheim (Germany)
  • Codes CREF : Chimie des solides (DI1316), Physique des plasmas (DI1233)
  • Unités de recherche UMONS : Chimie des interactions plasma-surface (S882)
  • Instituts UMONS : Institut de Recherche en Science et Ingénierie des Matériaux (Matériaux)
Texte intégral :

Abstract(s) :

(Anglais) We have studied the influence of chemical composition on the constitution and elastic properties of dense radio-frequency (RF)-sputtered hydroxyapatite (HA) coatings. The chemical composition was modified by varying the RF sputtering power density (PD). As the PD was increased by 240%, the Ca/P ratio measured by X-ray photoelectron spectroscopy increased from ˜1.51 to ˜1.82. X-ray diffraction indicates phase pure hexagonal HA except for the sample prepared at the highest PD where CaO and Ca3(PO4)2 also form. Deviations from the stoichiometric Ca/P ratio result in reduction of the elastic modulus. For Ca/P?=?1.51?±?0.02, the elastic modulus decreases by ˜15%. This may be due to incorporation of Ca vacancies in the lattice, while for Ca/P?=?1.82?±?0.02, the average elastic modulus decreases by ˜10% due to formation of additional phases.

Identifiants :
  • DOI : 10.1002/ppap.200700112