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The effect of sintering temperature in the interval from 1775 to 1850°C on the density, microstructure, hardness and fracture toughness of ceramic composites consisting of a boron carbide matrix and… Click to show full abstract
The effect of sintering temperature in the interval from 1775 to 1850°C on the density, microstructure, hardness and fracture toughness of ceramic composites consisting of a boron carbide matrix and titanium diboride secondary phase was studied. The composites were hot pressed using in situ reaction between boron carbide and 40 wt.% of titanium dioxide additive. The samples were hot pressed at different temperatures but for the constant time of 60min, under the pressure of 35MPa in vacuum of 10 Pa. Both Vickers hardness and fracture toughness of the composites increased with the sintering temperature.Maximal hardness of 29.8GPa and fracture toughness of 6.9MPa•m1/2 were achieved for the composite with 29.6 vol.% of titanium diboride secondary phase sintered at the highest sintering temperature of 1850°C.
Journal Title: Processing and Application of Ceramics
Year Published: 2020
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