Solid phase in situ synthesis of ZrO2 bioceramics via SPS–RS technology
Keywords:
bioceramics, porous ceramics, zirconium dioxide, hydroxyapatite, implants, Spark Plasma Sintering, Reaction SinteringAbstract
The paper presents preparation of biocompatible ZrO2 ceramics via the Spark Plasma Sintering – Reaction Synthesis (SPS–RS) route. High mechanical strength (over 400 MPa) and peculiar porosity are controlled by the adjustment of sintering conditions. Chemical interaction of phosphate precursors introduced into the mixture with ZrO2 provides biocompatible Ca10(PO4)6(OH)2 phases formed «in situ» during sintering. Porous structure of bioceramics obtained by SPS or SPS–RS has been shown to be improved using poreforming agent (carbon black). Original synthesis routine based on SPS–RS «in situ» technique results in new ZrO2 ceramics containing biocompatible phosphate components and possessing unique structural and mechanical characteristics. Obtained ceramics is highly prospective as a material for bone-ceramic implants able to promote osteogenesis during bone tissue recovery.