Microstructural characterisation of laser synthesised bioactive ceramic glass
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TACA, Mihaela, VASILE, Eugeniu, BOROICA, Lucica, COJOCARU, Mihai Ovidiu. Microstructural characterisation of laser synthesised bioactive ceramic glass. In: Materials Science and Condensed Matter Physics, 13-17 septembrie 2010, Chișinău. Chișinău, Republica Moldova: Institutul de Fizică Aplicată, 2010, Editia 5, p. 68.
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Materials Science and Condensed Matter Physics
Editia 5, 2010
Conferința "Materials Science and Condensed Matter Physics"
Chișinău, Moldova, 13-17 septembrie 2010

Microstructural characterisation of laser synthesised bioactive ceramic glass


Pag. 68-68

Taca Mihaela1, Vasile Eugeniu2, Boroica Lucica3, Cojocaru Mihai Ovidiu4
 
1 S.C. Metav-Cercetare Dezvoltare S.A.,
2 Intreprinderea Metalurgica pentru Aeronautica METAV S.A.,
3 National Institute for Laser, Plasma and Radiation Physics (INFLPR),
4 University Politehnica of Bucharest
 
Disponibil în IBN: 14 aprilie 2021


Rezumat

Ceramic glasses are used as bioactive coatings on metallic prosthesis due to their ability to stimulate own organism regeneration mechanisms and bone bonding formation.The most used deposition methods are plasma procedures, using conventional prepared ceramic targets (melting in electric furnaces, quenching, milling and granulometric separation, addition of organic and inorganic additives, sintering). In opposite to plasma technologies, laser procedures allow high adherence coatings and avoid the phase separation from amorphous material. By performing the synthesis of bioactive glass from raw materials even during the laser deposition process, melting and ultra rapid solidification of ceramic materials occur and glasses controlled by the process parameters (especially laser power and solidification rate) will be obtained. A mixture of ceramic powders (P2O5 – 6.46%, CaO-20.84%, B2O3-15.84, SiO2-27.34, Na2CO3 – 23.04%wt.) was melted using different irradiation regimes. The influence of power density and irradiation time on the glass chemical composition and phase morphology was evaluated by means of scanning electron microscope (SEM) and X-ray diffraction. The laser synthesised samples shoved an extremely fine nano structure, with homogenous chemical composition. A 1.2-1.3 mm thick melted layer was obtained for the given experimental conditions. No structural or chemical differences between samples was noticed. The bioactive behavior of the laser processed glasses will be investigated in the next phase of the study.