Effect of Binder Composition on WC Grain Growth in Cemented Carbides. Issue 11 (14th July 2015)

• Record Type: Journal Article
• Authors: Pellan, Maxime; Lay, Sabine; Missiaen, Jean‐Michel; Norgren, Susanne; Angseryd, Jenny; Coronel, Ernesto; Persson, Tomas
• Is Part Of: Journal of the American Ceramic Society. Volume 98:Issue 11(2015)
• Page Start: 3596
• Page End: 3601
• Publication Date: 2015-07-14
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.13748
• Languages: English
• ISSNs: 0002-7820

Abstract

Abstract : In this work, the effects of cobalt content and C/W ratio on grain growth are studied, in order to better understand the mechanisms. Powder compacts were sintered at 1410°C for 1 and 5 h. The relative contribution of carbide dissolution in the binder and grain growth for the evolution of the size distribution is discussed. Grain size measurements were made with the Electron BackScattered Diffraction technique. The distribution of 2D equivalent disk diameters was converted in a distribution of 3D equivalent sphere diameters, with the Saltykov method. High cobalt content favors grain growth in W‐rich samples whereas it has a slight influence on C‐rich samples. But still grain growth is significantly faster in C‐rich samples. Variation in the D 90 / D 10 ratio indicates a tendency to abnormal growth, with a broadening of the size distribution between 1 and 5 h, favored by high binder content.