High-toughness Ce-TZP/Al sub 2 O sub 3 ceramics with improved hardness and strength

Journal Article · Tue Jan 01 04:00:00 EST 1991 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1991.tb07315.x· OSTI ID:5161722

Cutler, R A; Mayhew, R J ^[1]; Prettyman, K M; Virkar, A V ^[2]

---

1. Ceramatec, Inc., Salt Lake City, UT (US)
2. Dept. of Materials Science and Engineering, Univ. of Utah, Salt Lake City, UT (US)

Simultaneous additions of SrO and Al{sub 2}O{sub 3} to ZrO{sub 2}(12 mol% CeO{sub 2}) lead to the in situ formation of strontium aluminate (SrO {center dot} 6Al{sub 2}O{sub 3}) platelets {approx}0.5 {mu}m in width and 5 to 10 {mu}m in length within the Ce-TZP ceramics have the strength (500 to 700 MPa) and hardness (13 to 14 GPa) of Ce-TZP/Al{sub 2}O{sub 3} while maintaining the high toughness (14 to 15 MPa {center dot} m{sup 1/2}) of Ce-TZP. Optimum room-temperature properties are obtained at SrO/Al{sub 2}O{sub 3} molar ratios between 0.025 and 0.1 for ZrO{sub 2}(12 mol% CeO{sub 2}) with starting Al{sub 2}O{sub 3} contents ranging between 15 and 60 vol%. The role of various toughening mechanisms is discussed for these composite ceramics.

• OSTI ID: 5161722
• Journal Information: Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 74:1; ISSN JACTA; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CERIUM COMPOUNDS
CERIUM OXIDES
CHALCOGENIDES
COMPOSITE MATERIALS
CRYSTALS
FABRICATION
HARDNESS
MATERIALS
MECHANICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
POLYCRYSTALS
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES