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Optimization of Processing Parameters for WC-11Co Cemented Carbide Doped with Nano-Crystalline CeO2

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Abstract

Nine types of trace nano-CeO2-doped WC-11Co cemented carbides designed by orthogonal method were prepared. The variance analysis results show that the relative density increases with increasing sintering temperature in the range of 1400-1450 °C; the hardness is highly dependent on grain size of WC which is closely related to the particle size of the initial WC powder and grain refinement produced by nano-CeO2; the bending strength of WC-11Co cemented carbide with less than 0.15 wt.% of nano-CeO2 is effectively improved because of its effect on the decreasing of porosity and inhibiting the grain growth of WC and martensitic phase transformation of Co; the fracture toughness rises at the beginning then drops later if the particle size of initial WC powder is in the range of 3-11 μm.

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Acknowledgments

This study was supported by the Program of Excellent Team at Harbin Institute of Technology.

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  1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China

    Xiaoguang Sun, You Wang, Fei Peng, Zhaoyi Pan & Liang Wang

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  1. Xiaoguang Sun
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Correspondence to You Wang.

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Sun, X., Wang, Y., Peng, F. et al. Optimization of Processing Parameters for WC-11Co Cemented Carbide Doped with Nano-Crystalline CeO2 . J. of Materi Eng and Perform 22, 112–117 (2013). https://doi.org/10.1007/s11665-012-0236-x

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  • DOI: https://doi.org/10.1007/s11665-012-0236-x

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