Blunt corners of WC grains induced by lowering carbon content in WC–12mass%Co cemented carbides

• Published in: Journal of materials science Vol. 46; no. 12; pp. 4413 - 4419
• Main Authors: Sugiyama, I., Goto, M., Taniuchi, T., Shirase, F., Tanase, T., Okada, K., Ikuhara, Y., Yamamoto, T.
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.06.2011; Springer; Springer Nature B.V
• Subjects: Carbon; Carbon content; Cemented carbides; Characterization and Evaluation of Materials; Chemistry and Materials Science; Classical Mechanics; Cobalt; Corners; Crystallography and Scattering Methods; Electron microscopes; Grain; Grains; Habits; Iib 2010; Materials Science; Planes; Polymer Sciences; Solid Mechanics; Transmission electron microscopy; Tungsten alloys; Tungsten carbide; Carbon Content; Cement Carbide; Habit Plane; Prismatic Plane; Interface Energy
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1007/s10853-010-5076-1

Habit planes at WC/Co interfaces were investigated from a viewpoint of carbon content in WC–12mass%Co cemented carbides by transmission electron microscopy (TEM). WC/Co interfaces typically consist of (0001) and habit planes with blunt corners, which are very close to habit plane. The sizes of the blunt corners increase as the carbon content decrease. The expansions of blunt corners are due to the change in interface energy caused by the variation of the carbon content. The change in interface energy is discussed in terms of the incoherency between the (0001) planes of the WC grains and the Co-phase.