High-Strength and High-Fracture-Toughness Ceramics in the Al2O3/LaAl11O18 Systems |
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| Authors: | Masaki Yasuoka Kiyoshi Hirao Manuel E Brito Shuzo Kanzaki |
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| Affiliation: | National Industrial Research Institute of Nagoya, Hirate-cho 1–1, Kita-ku, Nagoya 462, Japan |
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| Abstract: | Control of microstructure in the Al2O3/LaAl11O18 system was performed. Elongated alumina grains were formed by doping with small addition of silica, and 20 vol% lanthana- luminate was formed in situ by the reaction of LaAlO3- A12O3 in an alumina matrix. Strengths of over 600 MPa and a high fracture toughness (6 MPa.m1/2) were achieved in the material with both elongated A12O3 grains and LaAl11O18 platelets. Generally antagonistic properties such as strength and fracture toughness have been made compatible in the same ceramic system. |
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