Micrograph 195 and full record
- Micrograph no
- 195
- Brief description
- Zirconia Toughened Alumina (ZTA)
- Keywords
- alumina , ceramic , composite material , toughness , zirconia
- Categories
- Ceramic, Composite
- System
- ZrO2-Al2O3
- Composition
- ZrO2 5-30, Al2O3 70-95 (wt%)
- Standard codes
- Reaction
- Processing
- Oxide powder mixtures are hot pressed or pressureless sintered at <1600ºC.
- Applications
- Wear, bearing and pump components and in cutting tools.
- Sample preparation
- Polished and unetched.
- Technique
- Scanning electron microscopy (SEM) in backscattered electron imaging (BEI) mode
- Length bar
- 10 μm
- Further information
- The ZrO2 addition to Al2O3 increases its toughness via the tetragonal to monoclinic ZrO2 transformation, so called transformation toughening and microcracking. The bright zirconia can be inter- or intra-granular.
- Contributor
- Prof W E Lee
- Organisation
- Department of Engineering Materials, University of Sheffield
- Date
- 02/09/02
- Licence for re-use
- Attribution-NonCommercial-ShareAlike 4.0 International
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