Abstract
This study presented nanosized WC-Co composite powders synthesized using a one-step reduction-carbonization process with a combination of CH4/H2 as a gas carbon source and soluble starch as an in situ carbon source. The results of carbon analysis and X-ray diffraction revealed that WC-Co nanocomposite powders with a pure WC and Co phase could be obtained at 1100 °C after 0.5 h. A higher gas flow ratio of CH4/H2 during the reduction-carbonization process led to a higher total carbon content of the sample. A field emission scanning electron microscope confirmed that the particles in the WC-6 wt% Co composite powders had the lowest average size of 43 nm with equiaxed shapes. A sintering neck was observed in the WC-3 wt% Co composite powders whereas faceted particles were found in the WC-12 wt% Co composite powders. Moreover, this method has advantages of simple processing, rapid synthesis and good applicability in potential industry application.
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Yang, Q., Yang, J., Yang, H. et al. Synthesis and characterization of WC-Co nanosized composite powders with in situ carbon and gas carbon sources. Met. Mater. Int. 22, 663–669 (2016). https://doi.org/10.1007/s12540-016-6033-6
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DOI: https://doi.org/10.1007/s12540-016-6033-6