リン酸三カルシウム-ジルコニア系複合セラミックスの二,三の機械的性質

概要

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Mixtures of β-tricalcium phosphate (β-TCP) and zirconia containing 0, 2, 3, 4 and 8 mol % Y_2O_3 were hot-pressed for 10 min at 1300°-1400℃ and 20 MPa, and the mechanical properties ( bending strength, fracture toughness. Vickers hardness and modulus of elasticity) of the hot-pressed bodies were measured. The zirconia content was up to 50 vol % . The obtained ceramics consisted of β-TCP and zirconia. The above-mentioned mechanical properties increased with increasing zirconia content. Zirconia containing 2 and 3 mol % Y_20_3 ( TZ-2 Y and TZ-3Y) gave better results than other zirconias. Ceramics containing 50 vol % zirconia ( TZ-2Y or TZ-3Y) fired at 1350° and 1400℃ had a bending strength of about 440 MPa and a fracture toughness of about 2.7 ・mMPa^<1/2>. These values were two or three times as large as those of β-TCP monolithic compacts.
社団法人日本セラミックス協会の論文
1988-01-01