ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Polycrystalline diamond (PCD) exhibits a thermal conductivity similar to that of theelectrically conductive chemical vapor deposition diamond (EC-CVD diamond) found to function aszero-wear electrodes at short pulse duration. In this study, PCD was used as electrodes applied toEDM on tungsten carbide. Two kinds of PCD (CTB-010 and CTH-025) with a flat surface were used.The wear of the PCD electrodes was about 1.5% for very short pulse duration such as te=1μs, but itwas zero wear at te=30μs, though the wear of a Cu-W electrode was 10% even on the machinerecommended conditions for the low wear. EDM experiment using a V-shaped PCD electrode with anincluded angle of 45° was also carried out and the performance was compared with the case using aV-shaped Cu-W electrode. Under the conditions of a no load voltage of 60V, a set peak current of 2A,and a medium pulse duration of te=15μs, there was no wear on PCD electrodes when observed underthe SEM, whereas a 50μm-deep wear on the Cu-W electrodes even under the machine recommendedcondition for the low wear was observed
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.329.631.pdf
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