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

Journal Article · Mon Dec 31 23:00:00 EST 1990 · 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]

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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

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