Journal
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
Volume 25, Issue 2, Pages 153-158Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrmhm.2006.03.007
Keywords
pulse plasma sintering; WC-Co cemented carbides; nanomaterials
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Nanocrystalline WC-12 wt.% Co was consolidated by the pulse plasma sintering (PPS) method at various temperatures between 900 and 1200 degrees C under a pressure of 60 MPa for 5 min. The cemented carbides sintered at 1100 degrees C have a relative density of 99%, hardness of 2250 HV30, K-IC = 15.3 WPam(1/2), and WC crystallite size of about 50 nm. An increase of the sintering temperature to 1200 degrees C results in the increase of the WC crystallite size to about 110 nm, the hardness being decreased to 2200 HV30, and K-IC being decreased to 11.9 MPa1/2. (c) 2006 Elsevier Ltd. All rights reserved.
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