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Glass-matrix biocomposites.

E Verné1, C V Brovarone, D Milanese

  • 1Materials Science and Chemical Engineering Department, Politecnico di Torino, C.so Duca degli Abruzzi 24, Torino, Italy. verne@athena.polito.it

Journal of Biomedical Materials Research
|July 18, 2000
PubMed
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This study developed bioactive glass-matrix/titanium particle composite coatings on titanium alloy substrates using Vacuum Plasma Spray. These enhanced coatings aim to improve the mechanical properties of brittle bioactive materials for broader biomedical applications.

Area of Science:

  • Biomaterials Science
  • Materials Engineering
  • Biomedical Engineering

Background:

  • Bioactive glass-matrix/titanium particle composites were developed on Ti6Al4V substrates.
  • The base glass is bioactive, forming an apatite layer in simulated body fluid (SBF).
  • Titanium was used as a toughening phase due to its biocompatibility.

Purpose of the Study:

  • To enhance the mechanical properties of brittle bioactive glass-matrix materials.
  • To expand the biomedical applications of these composite coatings.
  • To optimize the processing of glass-matrix/titanium particle composites.

Main Methods:

  • Vacuum Plasma Spray (VPS) was used to coat Ti6Al4V substrates.
  • Differential Thermal Analysis (DTA), Differential Scanning Calorimetry (DSC), hot-stage microscopy, and dilatometry were employed.

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  • Characterization included X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), Vickers indentations, and leaching tests.

    • Main Results:

    • Composite powders were successfully prepared and sprayed onto Ti6Al4V substrates.
    • Thermal properties of glass-titanium mixtures were analyzed to optimize sintering.
    • Coated samples exhibited characteristics suitable for biomedical applications.

    Conclusions:

    • The developed composite coatings show potential for improving mechanical properties of bioactive materials.
    • VPS is an effective method for applying these bioactive coatings.
    • Further research can explore expanded biomedical uses for these enhanced materials.