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Effect of Al2O3 Addition on the Mechanical Properties of Biocompatible ZrO2-Al2O3 Composites
- Source :
- Materials Science Forum; November 2006, Vol. 530 Issue: 1 p575-580, 6p
- Publication Year :
- 2006
-
Abstract
- In this work, the effects of alumina additions on the properties of the ZrO2-Al2O3 ceramic composites were investigated. Samples of ZrO2 with Al2O3 additions varying between 0 and 30wt-% were prepared. The powder mixtures were milled, compacted by uniaxial cold pressing and sintered at 16000C, in air, for 2 hours. The sintered samples were characterized by their relative density, phase composition and microstructure. As mechanical properties at room temperature, their Vickers hardness and fracture toughness were determined: In all sintering conditions and Al2O3 amounts, the samples presented relative density higher that 99%. The Al2O3 addition produces a linear increase of the hardness, reaching values between 1350 and 1610 HV for the addition of 0 and 30% of alumina, respectively. The fracture toughness was near to 8 MPam1/2 in all conditions. The phase composition, microstructure and relative density were correlated in order to interpret the mechanical properties obtained.
Details
- Language :
- English
- ISSN :
- 02555476 and 16629752
- Volume :
- 530
- Issue :
- 1
- Database :
- Supplemental Index
- Journal :
- Materials Science Forum
- Publication Type :
- Periodical
- Accession number :
- ejs20111840
- Full Text :
- https://doi.org/10.4028/www.scientific.net/MSF.530-531.575