Abstract

Abstract Dense Al2O3–TiN composites with 5–25 vol% TiN were manufactured by hot pressing technique. The effect of the content of a dispersion-toughening aid, TiN, on the mechanical properties, electrical resistivity, oxidation resistance and wear resistance were studied and related to the microstructure. The ceramics with a content of 25 vol% TiN were characterized by the highest strength, 567 MPa, and the lowest electrical resistivity, 2·5×10−3 Ω.cm. The material was suitable for electrical discharge machining.

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