Simoni, Helio R.Saito, EduardoDos Santos, ClaudineiSantos, Felipe AntunesRamos, Alfeu Saraiva [UNESP]Silva, Olivério Moreira M.2014-05-272014-05-272010-12-15Materials Science Forum, v. 660-661, p. 701-706.0255-5476http://hdl.handle.net/11449/72228In this work, the effect of the milling time on the densification of the alumina ceramics with or without 5wt.%Y 2O 3, 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. © (2010) Trans Tech Publications.701-706engAl 2O 3Al 2O 3-Y 2O 3CharacterizationHigh-energy ball millingSinteringAlumina ceramicCold uniaxial pressingsCrystalline degreeGreen densitiesMilled powdersMilling timeSintered samplesAluminumCeramic materialsCrystallite sizeHigh energy physicsMilling (machining)Milling machinesPowdersSintered aluminaSpheresX ray diffractionX ray powder diffractionBall millingTrabalho apresentado em evento10.4028/www.scientific.net/MSF.660-661.701Acesso aberto2-s2.0-78649936763