• Pancrazi, Louis
• Tiec, Arnaud Le
• Petit, Clémence
• Douard, Nathalie

Abstract

<jats:p>B-type carbonated hydroxyapatite (C<jats:sub>B</jats:sub>HA) is potentially an excellent biodegradable bioceramic for bone repair. However, conventional sintering results in formation of undesired phases. Therefore, microwave sintering of C<jats:sub>B</jats:sub>HA was investigated to assess the possibility to reduce formation of unwanted phases. Pellets with 0.8 mol% of B-type carbonate were sintered in a multimode instrumented cavity under static air with short thermal cycles. They were prepared from a C<jats:sub>B</jats:sub>HA powder alone and from a mixture of C<jats:sub>B</jats:sub>HA and carbon powder to generate a local <jats:italic>in-situ</jats:italic> CO<jats:sub>2</jats:sub> atmosphere. XRD, FT-IR, SEM and BET analyses indicated that C<jats:sub>B</jats:sub>HA densification with increase temperature lead to decomposition into apatite. The addition of carbon powder to the C<jats:sub>B</jats:sub>HA that generate a CO<jats:sub>2</jats:sub>-rich atmosphere around the samples did not prevent the decomposition. Efficient control of temperature and atmosphere composition is required to improve microwave sintering of C<jats:sub>B</jats:sub>HA bioceramics.</jats:p>

Topics

• impedance spectroscopy
• Carbon
• phase
• scanning electron microscopy
• x-ray diffraction
• decomposition
• sintering
• densification