Micro-electrical discharge machining of polycrystalline diamond using rotary cupronickel electrode

作者：Yan Jiwang^*; Watanabe Kazunori; Aoyama Tojiro

来源：CIRP Annals, 2014, 63(1): 209-212.

DOI：10.1016/j.cirp.2014.03.058

• Electrical discharge machining
• Diamond
• Microstructure

Cupronickel was used as the electrode material to fabricate microstructures on polycrystalline diamond by electrical discharge machining (EDM). The electrodes were shaped into tiny rotary wheels driven by the flow of EDM fluid. Results showed that material removal rate was improved by a factor of five compared to conventional electrode materials. Raman spectroscopy and energy dispersive X-ray spectroscopy indicated that graphitization of diamond and diffusion-based chemical reactions between nickel and diamond dominated the EDM process. Effects of electrode rotation rate and discharge energy on the EDM characteristics were clarified. High form accuracy (similar to 0.5 mu m/1 mm) and low surface roughness (similar to 0.1 mu m Ra) were obtained.

• 出版日期2014