Microstructure and fracture toughness of yttria-doped tetragonal zirconia polycrystal/mullite composites prepared by an in-situ method

Journal Article · Thu Nov 30 23:00:00 EST 1989 · Journal of the American Ceramic Society; (USA)

DOI:https://doi.org/10.1111/j.1151-2916.1989.tb06093.x· OSTI ID:6883998

Okada, K; Otsuka, N ^[1]; Brook, R J ^[2]; Moulson, A J ^[3]

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1. Tokyo Inst. of Tech., Yokohama (Japan)
2. Max-Planck-Institut fuer Metallforschung, Stuttgart (Germany, F.R.). Pulvermetallurgisches Lab.
3. Leeds Univ. (UK)

Yttria-doped tetragonal zirconia polycrystal (Y-TZP)/mullite composites were prepared by the methods: in situ whisker growth (IS), physical mixing (PM) of zirconia powder and mullite whiskers, and reaction sintering (RS). Microstructures and fracture toughness values were compared. All the composites with 15 vol% of mullite could be densified to more than 97% relative density by firing at 1500{degrees} to 1550{degrees}C for 10 h. The fracture toughness of the composites as measured by the indentation method showed a clear enhancement compared with that of pure Y-TZP.

• OSTI ID: 6883998
• Journal Information: Journal of the American Ceramic Society; (USA), Journal Name: Journal of the American Ceramic Society; (USA) Vol. 72:12; ISSN 0002-7820; ISSN JACTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360203 -- Ceramics
Cermets
& Refractories-- Mechanical Properties
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALLOYS
CHALCOGENIDES
COMPOSITE MATERIALS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
DENSITY
FABRICATION
FRACTURE PROPERTIES
MATERIALS
MECHANICAL PROPERTIES
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLYCRYSTALS
TETRAGONAL LATTICES
TRANSITION ELEMENT COMPOUNDS
VERY HIGH TEMPERATURE
YTTRIUM ADDITIONS
YTTRIUM ALLOYS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES