SciELO - Scientific Electronic Library Online

 
vol.14 issue3Purification of Single-Wall carbon nanotubes by heat treatment and supercritical extractionPorosity study of synthetic sandstones by non-destructive nuclear techniques author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Materials Research

Print version ISSN 1516-1439

Abstract

BALBINOTTI, Pedro et al. Microstructure development on sintered Ti/HA biocomposites produced by powder metallurgy. Mat. Res. [online]. 2011, vol.14, n.3, pp.384-393.  Epub Aug 05, 2011. ISSN 1516-1439.  http://dx.doi.org/10.1590/S1516-14392011005000044.

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 TixPy phase(s). The analyses revealed that titanium particles were covered with a compact layer of TixPy 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 TixPy phase(s).

Keywords : titanium; hydroxyapatite; composite; powder metallurgy.

        · text in English     · English ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License