Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8018785 | Materials Letters | 2015 | 16 Pages |
Abstract
WC-Co cemented carbides are metal-ceramic composites consisting of a ceramic phase, tungsten carbide, and a cobalt binder. The key to the exceptional properties of cemented carbides is the optimal combination of hardness and wear-resistance of WC grains, and toughness and ductility of the Co-based matrix. However, only the minority of WC/WC GBs are completely wetted by Co melt during the liquid phase sintering. We observed for the first time that other WC/WC GBs are not partially wetted and, therefore, “dry”. They are pseudopartially wetted, namely they have the high contact angle with cobalt binder and, nevertheless, contain the 2-3Â nm thin uniform Co-rich layer.
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Authors
B.B. Straumal, I. Konyashin, B. Ries, A.B. Straumal, A.A. Mazilkin, K.I. Kolesnikova, A.M. Gusak, B. Baretzky,