Oxide composite Al2O3–ZrO2(Y2O3) powders containing 50 and 70 vol.% Al2O3, are deposited from salt solutions. The surface area of the deposited powders exceeds 75 m2/g. It is established that the α-Al2O3 and t-ZrO2(Y2O3) matrix has an effect on stepwise crystallization of α-Al2O3 and the powder production history on the sinterability of oxide composites. Ceramics based on Al2O3–ZrO2(Y2O3) composite powder containing 20 vol.% titanium carbonitride are hot pressed to be used as a cutting tool. The microstructure and mechanical properties of the ceramics are analyzed. The best mechanical properties are shown by ceramic samples sintered at 1550°C at 35 MPa: bending strength 950 MPa, fracture toughness 10.1 MPa ⋅ m1/2, and hardness 18.0 GPa. The performance and lifetime of cutting tools based on these ceramics are tested according to GOST 26613–85.
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Translated from Poroshkovaya Metallurgiya, Translated from Poroshkovaya Metallurgiya, Vol. 49, No. 11–12 (476), pp. 74–83, 2010.
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Dyatlova, Y.G., Agafonov, S.V., Boikov, S.Y. et al. Tool ceramics based on Al2O3–ZrO2–TiCN composite. Powder Metall Met Ceram 49, 675–681 (2011). https://doi.org/10.1007/s11106-011-9287-z
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DOI: https://doi.org/10.1007/s11106-011-9287-z