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

Materials Research

Pedro Balbinotti²  Enori Gemelli²  Gabriel Buerger²  Sarah Amin De Lima²  Jailson De Jesus²  Nelson Heriberto Almeida Camargo²  Vinicius André Rodrigues Henriques¹  Gloria Dulce De Almeida Soares¹ 

[1] ,Universidade do Estado de Santa Catarina Centro de Ciências Tecnológicas Departamento de Engenharia MecânicaJoinville SC ,Brazil

关键词: titanium;    hydroxyapatite;    composite;    powder metallurgy;   

DOI  :  10.1590/S1516-14392011005000044

来源: SciELO

【 摘 要 】

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).

【 授权许可】

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