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- W2912315794 abstract "In this work, ultrafine-grained W-Cu composites without and with reinforcement of tungsten fibers (Wf) were prepared by successive processes of mechanical alloying, cold pressing, sintering and infiltration. For Wf reinforced W-Cu composite, the introduction of Wf coated with magnetron sputtered Cr, improved the sinterability and contiguity of Wf with the neighboring W powders, eliminating porosity between Wf and the matrix and improving the interfacial strength. Further compressive tests demonstrated that, compared with conventional commercial W-Cu composite made of micron-sized tungsten powders, for the ultrafine-grained W-Cu composite reinforced with Cr-coated Wf, the compressive strength increased dramatically by 122.9%, 43.6% and 91.3%, when deformed at room temperature, 300 °C and 500 °C, respectively. Besides, the electrical breakdown strength increased impressively by 118%, which can be ascribed to the arc dispersion from the increased fraction of grain boundaries in the ultrafine-grained structure free from blind holes." @default.
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- W2912315794 date "2019-05-01" @default.
- W2912315794 modified "2023-10-16" @default.
- W2912315794 title "Preparation and properties of ultrafine-grained W-Cu composites reinforced with tungsten fibers" @default.
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- W2912315794 doi "https://doi.org/10.1016/j.matlet.2019.01.146" @default.
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