Paper Title:
Characterization of ZrO2 and Al2O3 Bioceramics Obtained by Gelcasting
  Abstract

Gelcasting is a novel method of forming ceramics and has been increasingly employed in preparing complex-shaped, near-net-shape advanced materials. In this work, alumina, zirconia and alumina-zirconia bioceramics were shaped by gelcasting, using MAM-MBAM monomer system, with subsequent sintering and characterization. High purity tetragonal ZrO2 (3mol%Y2O3) and .Al2O3 powders were used as starting powders. Powder mixture containing 80 wt.% of alumina and 20 wt.% of tetragonal zirconia were obtained by milling/homogenization. In all cases, the suspension obtained had at least 55 vol.% solid loading. Ceramic bodies were demolded, dried and characterized by green relative density. The compacts were sintered in air at 1550 and 15750C, for 120 minutes, with controlled heating-rate to facilitate organic compounds removal. Sintered samples were characterized by relative density, and analyzed by X-Ray diffraction and scanning electronic microscopy. Hardness and fracture toughness were determined using Vicker’s indentation method.

  Info
Periodical
Materials Science Forum (Volumes 591-593)
Edited by
Lucio Salgado and Francisco Ambrozio Filho
Pages
482-486
DOI
10.4028/www.scientific.net/MSF.591-593.482
Citation
C. dos Santos, P. H.B. Prado, F. dos Santos Ortega, "Characterization of ZrO2 and Al2O3 Bioceramics Obtained by Gelcasting", Materials Science Forum, Vols. 591-593, pp. 482-486, 2008
Online since
August 2008
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Faik N. Oktar, Yasin Genc, Gültekin Göller, E.Z. Erkmen, D. Toykan, Lutfiye Sevgi Özyeğin, H. Demirkıran, H. Haybat
2087
Authors: Camila M. Lapa, Ricardo Arthur Sanguinetti Ferreira, J. Albino Aguiar, Charles L. da Silva, Dulcina P.F. Souza, Yogendra Prasad Yadava
Abstract:In high technology industries ceramics have several uses, especially at high temperature, e.g. inert crucibles, electrodes and catalysts. We...
529
Authors: Roberta M.C. Sasahara, H.N. Yoshimura, C. Fredericci, Alberto Calasans, Paulo Francisco Cesar, André Luiz Molisani
Abstract:The aim of this work was to establish a route to produce pre-sintered blocks of Y-TZP (yttria stabilized tetragonal zirconia polycrystal)...
712
Authors: Jun Ting Luo, Chun Xiang Zhang, Hai Feng Ma, Ge Wang
Chapter 1: Mineral Materials
Abstract:The amorphous nano-sized silicon nitride powders were sintered by cold isostatic pressing –normal press sintering method. The sintering...
17
Authors: Guerold Sergueevitch Bobrovinitchii, Ana Lúcia Diegues Skury, Sérgio Neves Monteiro, Marcia G. de Azevedo
Chapter 2: Ceramics I
Abstract:Ceramic based compacts used in tool bits are of fundamental importance for high speed machining operations. Pure ceramic, however, is too...
914