Sintering and mechanical properties of yttria-doped tetragonal ZrO/sub 2/ polycrystal/mullite composites

Journal Article · Sat Oct 31 23:00:00 EST 1987 · J. Am. Ceram. Soc.; (United States)

OSTI ID:7005406

Ishitsuka, M; Sato, T; Endo, T; Shimada, M

Yttria-doped tetragonal ZrO/sub 2/ polycrystal (Y-TZP)/mullite composite were sintered at 1450/sup 0/ to 1500/sup 0/C in air to disperse rodlike mullite grains at the grain boundary of Y-TZP and the mechanical and thermal properties were investigated. The aspect ratios of mullite grain were >2. High fracture strength of 1000 MPa and fracture toughness of 12 MPa.m/sup 1/2/ were obtained by dispersing <20 vol% of mullite into Y-TZP. The thermal expansion coefficient of Y-TZP/mullite composites decreased with increasing mullite content. The thermal shock resistance of Y-TZP was greatly improved by dispersion of rodlike mullite grains.

• Research Organization: Dept. of Applied Chemistry, Faculty of Engineering, Tohoku Univ., Sendai 980 (JP)
• OSTI ID: 7005406
• Journal Information: J. Am. Ceram. Soc.; (United States), Journal Name: J. Am. Ceram. Soc.; (United States) Vol. 70:11; ISSN JACTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
&amp; Refractories-- Preparation &amp; Fabrication
360203 -- Ceramics
Cermets
&amp; Refractories-- Mechanical Properties
360204 -- Ceramics
Cermets
&amp; Refractories-- Physical Properties
CHALCOGENIDES
COMPOSITE MATERIALS
CRYSTAL DOPING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
DOPED MATERIALS
FABRICATION
FRACTURE PROPERTIES
GRAIN BOUNDARIES
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIALS
MECHANICAL PROPERTIES
MICROSTRUCTURE
MINERALS
MULLITE
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLYCRYSTALS
SINTERING
STRUCTURAL CHEMICAL ANALYSIS
TETRAGONAL LATTICES
THERMAL SHOCK
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
VERY HIGH TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES