102213 Use of High Energy Ball Milling on the Sintering Optimization of Alumina Ceramics

Abstract:

In this work, the effect of the milling time on the densification of the alumina ceramics with or without 5wt.%Y2O3, is evaluated, using high-energy ball milling. The milling was performed with different times of 0, 2, 5 or 10 hours. All powders, milled at different times, were characterized by X-Ray Diffraction presenting a reduction of the crystalline degree and crystallite size as function of the milling time increasing. The powders were compacted by cold uniaxial pressing and sintered at 1550°C-60min. Green density of the compacts presented an increasing as function of the milling time and sintered samples presented evolution on the densification as function of the reduction of the crystallite size of the milled powders.

• Periodical: Materials Science Forum (Volumes 660-661)
• Pages: 701-706
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.660-661.701
• Online since: October 2010
• Authors: Helio R. Simoni, Eduardo Saito, Claudinei dos Santos, Felipe Antunes Santos, Alfeu Saraiva Ramos, Olivério Moreira Macedo Silva
• Keywords: Al₂O₃, Al₂O₃-Y₂O₃, Characterization, High-Energy Ball Milling (HEM), Sintering

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