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- W3046336413 endingPage "101522" @default.
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- W3046336413 abstract "Al2O3-based composites containing 20 vol% Ti were fabricated at various sintering temperatures and the effects of Al2O3 grain size (RAl2O3) and Ti particle size (RTi) on mechanical and electrical properties were studied. Results indicated that toughening effects caused by Ti were enhanced with the growth of Ti particles while the large Al2O3 matrix grains showed a reverse effect on toughening. Composite containing adequate RAl2O3 and RTi (both below 2 μm) exhibited the highest flexural strength and fracture toughness when sintered at 1500 °C. For RAl2O3 below 2 μm, electrical resistivity dropped as RTi increased. But for RAl2O3 over 2 μm, electrical resistivity relied on the size of both matrix grains and metal particles. Percolation threshold volume of Ti varied with size ratio RAl2O3/RTi. It is speculated that when RAl2O3/RTi is close to 1, percolation threshold in Al2O3-Ti system might reach the lowest value. By controlling RAl2O3/RTi ∼ 1 and RAl2O3 < 2 μm, it is possible to fabricate conductive ceramic-metal composites with excellent mechanical properties containing metal phase with relatively low content. For the composites prepared from starting materials with various sizes, this study has important guiding significance." @default.
- W3046336413 created "2020-08-07" @default.
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- W3046336413 date "2020-12-01" @default.
- W3046336413 modified "2023-10-01" @default.
- W3046336413 title "The effects of sintering temperature on mechanical and electrical properties of Al2O3/Ti composites" @default.
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- W3046336413 doi "https://doi.org/10.1016/j.mtcomm.2020.101522" @default.
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