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首页> 外文期刊>Materials Science and Engineering >Fabrication of W-Cu/CeO_2 composites with excellent electric conductivity and high strength prepared from copper-coated tungsten and Ceria powders
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Fabrication of W-Cu/CeO_2 composites with excellent electric conductivity and high strength prepared from copper-coated tungsten and Ceria powders

机译：由铜包钨和二氧化铈粉末制备的具有优异导电性和高强度的W-Cu / CeO_2复合材料的制备

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摘要

W-Cu/CeO_2 composites with excellent electric conductivity and high strength have been prepared from Cu-coated W and CeO_2 composite powders. The phase and morphology of W-Cu/CeO_2 composite powders and W-Cu/CeO_2 composites are characterized by x-ray diffraction, field-emission scanning electron microscopy and energy-dispersive spectroscopy. The relative density, microhardness, electrical conductivity, and bending strength of the sintered samples are also examined. Results show that the addition of Cu-coated CeO_2 composite powders significantly affect the microstructure and properties of W-Cu composite materials. The low content of CeO_2 (0, 0.25 wt%, 0.5 wt%) have made an inconspicuous impression on bending strength and microhardness. While the composites still exhibit a best bending strength of 1102.7 MPa, which is higher than the national standard (W-Cu) of 39.28%. When the addition of CeO_2 reached 0.25 wt%, the composites show the best electric conductivity of 69.41% IACS, which is higher than the national standard (W-Cu) of 65.26%. However, with further addition of CeO_2 to 1 wt% and 2 wt%, the composites show numerous pores and aggregated particles, which is prone to damage the properties of the alloys.
机译：由覆铜的W和CeO_2复合粉末制备了具有优异导电性和高强度的W-Cu / CeO_2复合材料。 W-Cu / CeO_2复合粉末和W-Cu / CeO_2复合粉末的相和形貌通过X射线衍射，场发射扫描电子显微镜和能谱分析表征。还检查了烧结样品的相对密度，显微硬度，电导率和弯曲强度。结果表明，添加铜包覆的CeO_2复合粉体显着影响W-Cu复合材料的组织和性能。 CeO 2的含量低（0、0.25 wt％，0.5 wt％）对弯曲强度和显微硬度没有明显影响。虽然复合材料仍显示出1102.7 MPa的最佳弯曲强度，高于39.28％的国家标准（W-Cu）。当CeO_2的添加量达到0.25 wt％时，复合材料的最佳电导率为69.41％IACS，高于65.26％的国家标准（W-Cu）。然而，进一步向1wt％和2wt％添加CeO 2时，复合材料显示出大量的孔和聚集的颗粒，这易于损坏合金的性能。

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  • 来源
    《Materials Science and Engineering》 |2015年第25期|61-66|共6页
  • 作者

    Ze-Long Lu; Lai-Ma Luo; Jing-Bo Chen; Xin-Min Huang; Ji-Gui Cheng; Yu-Cheng Wu;

  • 作者单位

    School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China;

    School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China,National-Local Joint Engineering Research Center of Nonferrous Metals and Processing Technology, Hefei 230009, China;

    School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China,National-Local Joint Engineering Research Center of Nonferrous Metals and Processing Technology, Hefei 230009, China;

    School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China,National-Local Joint Engineering Research Center of Nonferrous Metals and Processing Technology, Hefei 230009, China;

    School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China,National-Local Joint Engineering Research Center of Nonferrous Metals and Processing Technology, Hefei 230009, China;

    School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China,National-Local Joint Engineering Research Center of Nonferrous Metals and Processing Technology, Hefei 230009, China;

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  • 正文语种 eng
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  • 关键词

    Cu-coated CeO_2 composite powders; Electroless plating; W-Cu/CeO_2 composites; Electric conductivity;

    机译：铜包覆的CeO_2复合粉末;化学镀;W-Cu / CeO_2复合材料;电导率;

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