Al2O3/GdAlO3 eutectic fibers of high modulus of rupture produced by the laser heated pedestal growth technique
2007
Medeiros, Igor Studart | Andreeta, Erika R. M. | Hernandes, Antonio C.
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, λ² v = 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.
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