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Journal of Materials Science

, Volume 42, Issue 11, pp 3874–3877 | Cite as

Al2O3/GdAlO3 eutectic fibers of high modulus of rupture produced by the laser heated pedestal growth technique

  • Igor Studart MedeirosEmail author
  • Erika R. M. Andreeta
  • Antonio C. Hernandes
Article

Abstract

Eutectic Al2O3/GdAlO3 composites in the form of fibers were produced by the laser heated pedestal growth technique at high pulling rates ranging from 48 to 240 mm/h. Fibers 0.8 mm in diameter and 25 mm in length, devoid of pores or cracks, were pulled in an air atmosphere without seeding or pedestal rotation. “Chinese script” and complex-regular microstructures were present in all the fibers. The Jackson–Hunt relationship, λ2v = constant, applied very well to the eutectic Al2O3/GdAlO3 fibers. The modulus of rupture values varied from 800 to 1,780 MPa. The effects of high pulling rate, average phase spacing and modulus of rupture on the microstructure were studied.

Keywords

Al2O3 Gd2O3 Eutectic Phase Molten Zone Chinese Script 

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Igor Studart Medeiros
    • 1
    • 2
    Email author
  • Erika R. M. Andreeta
    • 3
  • Antonio C. Hernandes
    • 2
  1. 1.Departamento de Materiais Dentários, Faculdade de OdontologiaUniversidade de São PauloSão PauloBrazil
  2. 2.Grupo de Crescimento de Cristais e Materiais Cerâmicos, Instituto de Física de São CarlosUniversidade de São PauloSão CarlosBrazil
  3. 3.Departamento de FísicaUniversidade Federal de São CarlosSão CarlosBrazil

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