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Skin effect of WC–8 wt% Co alloy by microwave sintering

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Abstract

To investigate the microwave effect on the WC–Co alloys, WC–8 wt% Co alloy was fabricated by microwave sintering (MWS) in this paper. The results show that decarburization layer forms on the surface of the microwave-sintered samples. WC grain coarsening in the core area is strongly suppressed by the decarburization effect. In addition, the microstructure of the MWS-fabricated alloy was compared to that of the alloy sintered by vacuum sintering (VS). Microstructural investigations by transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS) show that more tungsten (29.50 wt%) is dissolved in the cobalt binder phase in microwave-sintered alloy than that in the vacuum-sintered samples. Finally, the formation mechanism of the surface layer by skin effect was discussed.

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Acknowledgments

This study was financially supported by the National Natural Science Foundation of China (No. 51274107).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China

    Rui Bao, Jian-Hong Yi, Feng-Xian Li, Shang Li & Shao-Yu Li

  2. State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, China

    Rui Bao, Jian-Hong Yi & Yuan-Dong Peng

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  1. Rui Bao
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  2. Jian-Hong Yi
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  3. Yuan-Dong Peng
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  4. Feng-Xian Li
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  5. Shang Li
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  6. Shao-Yu Li
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Correspondence to Jian-Hong Yi.

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Bao, R., Yi, JH., Peng, YD. et al. Skin effect of WC–8 wt% Co alloy by microwave sintering. Rare Met. 41, 1364–1368 (2022). https://doi.org/10.1007/s12598-015-0488-3

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  • DOI: https://doi.org/10.1007/s12598-015-0488-3

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