Abstract
Low-temperature and short-time sinter-forging has been used to obtain a dense WC/Y–TZP–Al2O3 hybrid ceramic–matrix composite with dispersed Hadfield steel with high fracture toughness. The hardness and К1С fracture toughness were 13.7 ± 0.3 GPa and 7.4 ± 0.4 MPa m1/2, respectively. The composite contained phases such as Y–TZP–Al2O3 eutectics and hypereutectic grains, WC agglomerates, γ-Fe particles as well as small amounts of Al2(WO4)3 and MnFe2O4. No t-ZrO2→m-ZrO2 transformational toughening occurred during mechanical loading so that enhanced fracture toughness resulted from forming a dense microstructures with ductile metallic interlayers between ceramic and tungsten carbide grains.
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