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Study on surface characteristics using phosphorous dielectric on wire electrical discharge machining of polycrystalline silicon

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Abstract

In this study, wire electrical discharge machining (WEDM) was implemented to process polycrystalline silicon ingot (electric resistance, 2–3 Ω cm), and the influences on surface characteristics were examined. At first, two different dielectrics, pure water and pure water with sodium pyrophosphate powder, were experimented to compare their effects on cutting speed and surface roughness. In the experiment, pure water with sodium pyrophosphate powder has shown that it enhanced process efficiency and improved surface smoothness. Then, the effects on cutting efficiency with different concentrations were examined; 0.05 M was chosen for its best performance. After setting the concentration, several experiments were conducted to find out how different currents and pulse-on times affect the cutting efficiency and surface roughness. The findings in this study prove that using phosphorous dielectric on WEDM could be applied onto polycrystalline silicon cutting. In addition, pure water with sodium pyrophosphate powder increases both working efficiency and improves infiltration of the phosphorous element on the surface. These findings could be future references on researches of solar cell in both industrial and academic fields.

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Authors and Affiliations

  1. Department of Mechanical Engineering, National Central University, Jhongli City, 320, Taiwan

    Chin-Chang Yeh & Biing-Hwa Yan

  2. Department of Mechanical Engineering, Tungnan University, New Taipei City, 222, Taiwan

    Kun-Ling Wu

  3. Department of Materials Engineering, Ming Chi University of Technology, New Taipei City, 243, Taiwan

    Jyh-Wei Lee

  4. Department of Mechanical Engineering, National Central University, Jhongli City, 32001, Taiwan, Republic of China

    Biing-Hwa Yan

Authors
  1. Chin-Chang Yeh
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  2. Kun-Ling Wu
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  3. Jyh-Wei Lee
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  4. Biing-Hwa Yan
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Correspondence to Biing-Hwa Yan.

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Yeh, CC., Wu, KL., Lee, JW. et al. Study on surface characteristics using phosphorous dielectric on wire electrical discharge machining of polycrystalline silicon. Int J Adv Manuf Technol 69, 71–80 (2013). https://doi.org/10.1007/s00170-013-4995-9

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  • DOI: https://doi.org/10.1007/s00170-013-4995-9

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