Effect of direct current and pulse plating on the EDM performance of copper-zirconium diboride composites

Dongming Guo, Min Zhang, Zhuji Jin, Renke Kang

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    Cite this article as:

    Dongming Guo, Min Zhang, Zhuji Jin, and Renke Kang, Effect of direct current and pulse plating on the EDM performance of copper-zirconium diboride composites, J. Univ. Sci. Technol. Beijing , 14(2007), No. 5, pp.464-468. https://dx.doi.org/10.1016/S1005-8850(07)60091-7
    Dongming Guo, Min Zhang, Zhuji Jin, and Renke Kang, Effect of direct current and pulse plating on the EDM performance of copper-zirconium diboride composites, J. Univ. Sci. Technol. Beijing , 14(2007), No. 5, pp.464-468. https://dx.doi.org/10.1016/S1005-8850(07)60091-7
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    Effect of direct current and pulse plating on the EDM performance of copper-zirconium diboride composites

    • Key Laboratory of the Ministry of Education of China for Precision & Non-traditional Machining, Dalian University of Technology, Dalian 116024, China

    基金项目: 

    This work was financially supported by the National Natural Science Foundation of China (No. 59935110) and the Science Foundation of Liaoning Province, China (No. 20062183).

      通信作者:

      Min Zhang E-mail: zminer1229@eyou.com

    中文摘要

    Direct current and pulse plating of copper-zirconium diboride (ZrB2) composites were studied and the effects of current density (DC) and pulse duty cycle (PC) on the EDM performance of the composites were investigated. With increasing current density, the effect of grain refinement on the electro-discharge machining (EDM) performance of the composites compensates that of the decrease of ZrB2 content in the composites, which improves the spark-resistance of the material. Under the same average current density and other experiment conditions, a lower duty cycle yields better EDM performance probably because more ZrB2 particles are incorporated in the composites in this condition. However, at a still lower duty cycle (10%), the particle agglomeration and the microcracks of the copper matrix occur, which considerably deteriorate the spark-resistance of the composites.

     

    Materials

    Effect of direct current and pulse plating on the EDM performance of copper-zirconium diboride composites

    Author Affilications

      • Key Laboratory of the Ministry of Education of China for Precision & Non-traditional Machining, Dalian University of Technology, Dalian 116024, China

    • Funds: 

      This work was financially supported by the National Natural Science Foundation of China (No. 59935110) and the Science Foundation of Liaoning Province, China (No. 20062183).

    • Received: 14 September 2006;
    Direct current and pulse plating of copper-zirconium diboride (ZrB2) composites were studied and the effects of current density (DC) and pulse duty cycle (PC) on the EDM performance of the composites were investigated. With increasing current density, the effect of grain refinement on the electro-discharge machining (EDM) performance of the composites compensates that of the decrease of ZrB2 content in the composites, which improves the spark-resistance of the material. Under the same average current density and other experiment conditions, a lower duty cycle yields better EDM performance probably because more ZrB2 particles are incorporated in the composites in this condition. However, at a still lower duty cycle (10%), the particle agglomeration and the microcracks of the copper matrix occur, which considerably deteriorate the spark-resistance of the composites.

     

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