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- W2008104889 abstract "Abstract Preparation of fine grained, hard and ductile pure tungsten for future fusion reactor applications was tested using the bottom-up approach via powder consolidation by spark plasma sintering (SPS) at different temperature (1300–1800 °C) and pressure (90–266 MPa) conditions. Pure tungsten powders with an average particle size of about 1 μm were sintered to high density (about 94%) with almost no grain growth at a temperature below 1400 °C and an applied pressure up to 266 MPa. These samples had a multi-modal grain size distribution (resembling the size distribution of the initial powder) and a very high Vickers hardness (up to 530 kg/mm 2 ). Above 1500 °C fast grain growth occurred and resulted in a drop in hardness. XRD on the surface of bulk samples showed a small amount of tungsten oxides; however, XPS and EDS indicated that these oxides were only surface contaminants and suggested a high purity for the bulk samples. The results demonstrate that SPS can lead to ultrafine and nanocrystalline tungsten if used to consolidate pure nano tungsten powders." @default.
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- W2008104889 date "2011-07-01" @default.
- W2008104889 modified "2023-10-02" @default.
- W2008104889 title "Multimodal grain size distribution and high hardness in fine grained tungsten fabricated by spark plasma sintering" @default.
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- W2008104889 doi "https://doi.org/10.1016/j.msea.2011.04.015" @default.
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