Properties of [Y]ZrO2 - Al2O3 and [Y]ZrO2 - Al2O3 - (Ti or Si)C composites
Creators
- 1. Research and Development Dept., Toshiba Tungaloy, 8 Shinsugita, isogo-ku, Yokohama (Japan)
Description
The effect of Al2O3 and (Ti or Si) C additions on various properties of a (Y)TZP (yttria-stabilized tetragonal zirconia polycrystal)-Al2O3-(Ti or Si)C ternary composite ceramic were investigated for developing a zirconia-based ceramic stronger than SiC at high temperatures. Adding Al2O3 to (Y)TZP improved transverse rupture strength and hardness to decreased fracture toughness. This binary composite ceramic revealed a rapid loss of strength with increasing temperature. Adding TiC to the binary ceramic suppressed the decrease in strength at temperatures above 1573K. The residual tensile stress induced by the differential thermal expansion between ZrO2 and TiC therefore must have inhibited the t- ω-mZrO2 martensitic transformation. It was concluded that a continuous skeleton of TiC prevented grain-boundary sliding between ZrO2 and Al2O3
Additional details
Publishing Information
- Journal Title
- Journal of the American Ceramic Society
- Journal Volume
- 72
- Journal Issue
- 2
- Series
- J. Am. Ceram. Soc.
- Journal Page Range
- 236-241
- ISSN
- 0002-7820
- CODEN
- JACTA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 20083834
- Subject category
- S36: MATERIALS SCIENCE; S36: MATERIALS SCIENCE; S36: MATERIALS SCIENCE;
- Descriptors DEI
- ALUMINIUM OXIDES; FRACTURE PROPERTIES; GRAIN BOUNDARIES; HIGH TEMPERATURE; MARTENSITE; PHASE TRANSFORMATIONS; SILICON CARBIDES; TETRAGONAL LATTICES; THERMAL EXPANSION; TITANIUM CARBIDES; ZIRCONIUM OXIDES
- Descriptors DEC
- ALLOYS; ALUMINIUM COMPOUNDS; CARBIDES; CARBON ADDITIONS; CARBON COMPOUNDS; CHALCOGENIDES; CRYSTAL LATTICES; CRYSTAL STRUCTURE; EXPANSION; IRON ALLOYS; MECHANICAL PROPERTIES; MICROSTRUCTURE; OXIDES; OXYGEN COMPOUNDS; SILICON COMPOUNDS; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; ZIRCONIUM COMPOUNDS