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Title: Properties of (Y)ZrO/sub 2/ - Al/sub 2/O/sub 3/ and (Y)ZrO/sub 2/ - Al/sub 2/O/sub 3/ - (Ti or Si)C composites

Abstract

The effect of Al/sub 2/O/sub 3/ and (Ti or Si) C additions on various properties of a (Y)TZP (yttria-stabilized tetragonal zirconia polycrystal)-Al/sub 2/O/sub 3/-(Ti or Si)C ternary composite ceramic were investigated for developing a zirconia-based ceramic stronger than SiC at high temperatures. Adding Al/sub 2/O/sub 3/ 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 ZrO/sub 2/ and TiC therefore must have inhibited the t- /omega/-mZrO/sub 2/ martensitic transformation. It was concluded that a continuous skeleton of TiC prevented grain-boundary sliding between ZrO/sub 2/ and Al/sub 2/O/sub 3/.

Authors:
Publication Date:
Research Org.:
Research and Development Dept., Toshiba Tungaloy, 8 Shinsugita, isogo-ku, Yokohama (JP)
OSTI Identifier:
5833908
Resource Type:
Journal Article
Journal Name:
J. Am. Ceram. Soc.; (United States)
Additional Journal Information:
Journal Volume: 72:2
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM OXIDES; PHASE TRANSFORMATIONS; SILICON CARBIDES; TITANIUM CARBIDES; ZIRCONIUM OXIDES; FRACTURE PROPERTIES; GRAIN BOUNDARIES; HIGH TEMPERATURE; MARTENSITE; TETRAGONAL LATTICES; THERMAL EXPANSION; 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; 360202* - Ceramics, Cermets, & Refractories- Structure & Phase Studies; 360203 - Ceramics, Cermets, & Refractories- Mechanical Properties; 360204 - Ceramics, Cermets, & Refractories- Physical Properties

Citation Formats

Fukuhara, M. Properties of (Y)ZrO/sub 2/ - Al/sub 2/O/sub 3/ and (Y)ZrO/sub 2/ - Al/sub 2/O/sub 3/ - (Ti or Si)C composites. United States: N. p., 1989. Web. doi:10.1111/j.1151-2916.1989.tb06107.x.
Fukuhara, M. Properties of (Y)ZrO/sub 2/ - Al/sub 2/O/sub 3/ and (Y)ZrO/sub 2/ - Al/sub 2/O/sub 3/ - (Ti or Si)C composites. United States. https://doi.org/10.1111/j.1151-2916.1989.tb06107.x
Fukuhara, M. 1989. "Properties of (Y)ZrO/sub 2/ - Al/sub 2/O/sub 3/ and (Y)ZrO/sub 2/ - Al/sub 2/O/sub 3/ - (Ti or Si)C composites". United States. https://doi.org/10.1111/j.1151-2916.1989.tb06107.x.
@article{osti_5833908,
title = {Properties of (Y)ZrO/sub 2/ - Al/sub 2/O/sub 3/ and (Y)ZrO/sub 2/ - Al/sub 2/O/sub 3/ - (Ti or Si)C composites},
author = {Fukuhara, M},
abstractNote = {The effect of Al/sub 2/O/sub 3/ and (Ti or Si) C additions on various properties of a (Y)TZP (yttria-stabilized tetragonal zirconia polycrystal)-Al/sub 2/O/sub 3/-(Ti or Si)C ternary composite ceramic were investigated for developing a zirconia-based ceramic stronger than SiC at high temperatures. Adding Al/sub 2/O/sub 3/ 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 ZrO/sub 2/ and TiC therefore must have inhibited the t- /omega/-mZrO/sub 2/ martensitic transformation. It was concluded that a continuous skeleton of TiC prevented grain-boundary sliding between ZrO/sub 2/ and Al/sub 2/O/sub 3/.},
doi = {10.1111/j.1151-2916.1989.tb06107.x},
url = {https://www.osti.gov/biblio/5833908}, journal = {J. Am. Ceram. Soc.; (United States)},
number = ,
volume = 72:2,
place = {United States},
year = {1989},
month = {2}
}