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Advances in Materials Science and Engineering
Volume 2015, Article ID 694672, 10 pages
Research Article

Preparation of Ag/Cu/Ti Nanofluids by Spark Discharge System and Its Control Parameters Study

1Department of Electrical Engineering, National Taipei University of Technology, Taipei 10608, Taiwan
2Light Source Division, National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan

Received 27 December 2014; Accepted 23 February 2015

Academic Editor: Belal F. Yousif

Copyright © 2015 Kuo-Hsiung Tseng et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This study selected silver, copper, and titanium as the research objects to explore the relationship between nanofluids properties and electrical discharge machining (EDM) processes. Regarding the products, UV-visible spectroscopy (UV-Vis) was applied to measure the concentration distribution of nanofluids; zeta-size analysis is applied for measuring nanometal particles’ Zeta-Potential and the size distribution of metallic particles in the fluid. Finally, various instruments, including scanning electron microscope (SEM), were applied to observe the shape, size, and composition ratio of metal particles after processing. According to the experimental results, the control of the discharge pulse time, in addition to affecting the concentration of metallic liquid and temperature in the process, affects the size of the metal particles after the process. As the resistivity of silver and copper is very low, at about  Ω·m, if is set to between 10~50 μs, good preparation efficiency can be obtained. The resistivity of titanium is  Ω·m, which is much larger than that of silver or copper. Hence, should be set to approximately 100 μs to achieve a good discharge success rate.