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Electrical Discharge Machining of Tungsten Carbide‐Cobalt Composites
Author(s) -
Gadalla A. M.,
Tsai W.
Publication year - 1989
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1989.tb07660.x
Subject(s) - materials science , tungsten carbide , cobalt , tungsten , composite material , carbide , grain size , metal , electrical discharge machining , machining , spheres , metallurgy , carbon fibers , composite number , physics , astronomy
Increasing the current, the frequency, or the pulse duration up to certain values increased the speed of cutting and rate of removal. The amount of liquid smearing the cavities prcduced by dislodging the WC grain and microcracks increased with increasing cobalt content and/or WC grain size. Depletion of carbon and formation of W 2 C and WC 1−x were detected on the surface. An analysis of debris showed that, in addition to melting the cobalt matrix, metallic vapors are formed and condense to hollow noncrystalline spheres which deformed and condense to hollow noncrystalline spheres which deform and crystallize if crushed.