In-situ synchrotron X-ray diffraction of hydroxyapatite-zirconia composite during conventional and flash sintering

Autor(es)

Lavagnini, Isabela R. ; Campos, Joao, V ; Jesus, Lilian M. ; Lobo, Anderson O. ; Ghose, Sanjit K. ; Raj, Rishi ; Pallone, Eliria M. J. A.

• Tipo de documento: Artigo Científico
• Fonte: Journal of the European Ceramic Society; v. 44, n. 7, p. 10-pg., 2024-02-24.

Resumo

We conducted in-situ X-ray diffraction to study the crystalline phase evolution in hydroxyapatite-zirconia composites during both conventional and flash sintering processes. Additionally, we examined the thermal history and microstructure of the composite under these sintering conditions. Despite both sintering methods reaching similar average temperatures, they yielded distinct results in terms of crystalline phase composition and microstructure. In the flash sintered samples, we observed a complete transformation of hydroxyapatite into alpha tricalcium phosphate and a complete tetragonal to cubic phase transition in zirconia. Conversely, the conventionally sintered samples remained practically stable. Notably, the flash sintered samples exhibited needle-like microstructures, which were absent in their conventionally sintered counterparts. This divergence suggests that the application of an electric field plays a role in generating athermal effects during the sintering of hydroxyapatite-zirconia composites. (AU)

• Processo FAPESP: 19/14677-9 - Influência da técnica Multi Step Flash Sintering no controle microestrutural da ZrO2
• Beneficiário: Eliria Maria de Jesus Agnolon Pallone
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 21/06509-9 - Sinterização com cristalização concorrente de vitrocerâmicas condutoras iônicas via flash sintering
• Beneficiário: João Vitor Campos
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 19/03786-1 - Instrumentação e automação de forno tubular adaptado à técnica flash sintering
• Beneficiário: João Vitor Campos
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado Direto
• Processo FAPESP: 22/10604-0 - Desenvolvimento de scaffolds cerâmicos para aplicação na engenharia tecidual
• Beneficiário: Carlos Eduardo Ambrósio
• Modalidade de apoio: Auxílio à Pesquisa - Temático