| Résumé | Hydroxyapatite (Ca₁₀(PO₄)₆(OH)₂, HA) is one of the most biocompatible materials known and it has been used clinically as artificial bone and for dental implants. HA has poor mechanical properties that limit its application in load-bearing implant construction. Therefore, it is common for HA to be coated onto biocompatible metals, such as Ti-6Al-4V alloy, in order to obtain a bioactive implant with excellent mechanical properties.
Pulsed Laser Deposition (PLD) technique has been used in this study to deposit thin films of calcium phosphate ceramics on three types of substrates, namely Si(100), ti-7Al-4V and stainless steel. A number of specific phases of calcium phosphate-based ceramic, such as amorphous HA, polycrystalline Tricalcium phosphate (TCP) and polycrystalline HA, as well as mixtures of the above phases have been successfully grown on the three substrates by pulsed excimer laser ablation of a single HA target at various substrate temperatures in the process gas of Ar-water mixture. |
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