Reinforcement of hydroxyapatite with hexagonal boron nitride

Autor: Ünal, S., Ekren, N., Oktar, F. N., Şengil, A. Z., Irmak, S., Oral, Özlem, Şahin, Y. M., Ficai, A., Agathopoulos, S., Gündüz, Oğuzhan
Jazyk: angličtina
Rok vydání: 2017
Popis: Hydroxyapatite (HA), obtained from bovine bones, was successfully reinforced with hexagonal boron nitrite (h-BN). h-BN/HA composites, with BN content up to 1.5 wt%, were sintered at various temperatures between 1000 and 1300 oC, in air. Well-sintered samples were obtained after sintering at 1200 and 1300 oC. The presence of h-BN contributed to dense, fine, and well-crystallized microstructure. The results of X-ray diffraction analysis and FT-IR spectroscopy showed that the produced composites comprised biphasic β-TCP/HCA (HCA: carbonate partially substituted HA). High values of mechanical properties were achieved, namely compression strength 153 ± 8 MPa for the sample 0.5% h-BN/HA and Vickers microhardness of 716 ± 25 HV for the samples 0.5% h-BN/HA, both sintered at 1300 oC. U2OS human bone osteosarcoma proliferation and cell viability showed no adverse effect in the presence of h-BN/HA, suggesting the potential use of the produced materials as safe biomaterials in bone tissue engineering.
Databáze: OpenAIRE