Microstructure development on sintered Ti/HA biocomposites produced by powder metallurgy

AUTOR(ES)

Balbinotti, Pedro, Gemelli, Enori, Buerger, Gabriel, Lima, Sarah Amin de, Jesus, Jailson de, Camargo, Nelson Heriberto Almeida, Henriques, Vinicius André Rodrigues, Soares, Gloria Dulce de Almeida

FONTE

Materials Research

DATA DE PUBLICAÇÃO

05/08/2011

RESUMO

Titanium-based composites with in-situ calcium and phosphor phases were prepared by powder metallurgy processing with titanium and hydroxyapatite (HA) powders. The mixtures were performed in a friction mill with alcohol for 5 hours, dried in a rotating evaporator, pressed at 600 MPa and sintered at 1200 ºC for 2 hours in argon atmosphere. Crystal phases of the as-fabricated composite are found to be, α-Ti, CaTiO3, Ca3(PO4)2 and Ti xPy phase(s). The analyses revealed that titanium particles were covered with a compact layer of Ti xPy and CaTiO3 phases, which resulted from the decomposition of HA into CaTiO3 and β-Ca3(PO4)2 at approximately 1025 ºC. Then the reactions were followed by the decomposition of β-Ca3(PO4)2, resulting in the growth of CaTiO3 layer and in the nucleation and growth of Ti xPy phase(s).

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