Next Article in Journal
Trifunctional Epoxy Resin Composites Modified by Soluble Electrospun Veils: Effect on the Viscoelastic and Morphological Properties
Previous Article in Journal
Preparation and Dielectric Properties of SiC/LSR Nanocomposites for Insulation of High Voltage Direct Current Cable Accessories
Open AccessArticle

Interfaces between Model Co-W-C Alloys with Various Carbon Contents and Tungsten Carbide

1
Department of Powder Metallurgy and Functional Coatings, National University of Science and Technology “MISiS”, Leninsky pr. 4, 119049 Moscow, Russia
2
Element Six GmbH, Städeweg 12-24, 36151 Burghaun, Germany
3
Central Facility for Electron Microscopy (GFE), RWTH Aachen University, Ahornstrasse 55, D-52074 Aachen, Germany
4
Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons Research Centre Juelich, D-52425 Juelich, Germany
*
Author to whom correspondence should be addressed.
Materials 2018, 11(3), 404; https://doi.org/10.3390/ma11030404
Received: 30 January 2018 / Revised: 6 March 2018 / Accepted: 7 March 2018 / Published: 9 March 2018
Interfaces between alloys simulating binders in WC-Co cemented carbides and tungsten carbide were examined on the micro-, nano-, and atomic-scale. The precipitation of fine WC grains and η-phase occurs at the interface of the alloy with the low carbon content. The precipitation of such grains almost does not occur in the alloy with the medium-low carbon content and does not take place in the alloy with the high carbon content. The formation of Co nanoparticles in the binder alloy with the medium-low carbon content was established. Interfaces in the alloy with the medium-low carbon content characterized by complete wetting with respect to WC and with the high carbon content characterized by incomplete wetting were examined at an atomic scale. The absence of any additional phases or carbon segregations at both of the interfaces was established. Thus, the phenomenon of incomplete wetting of WC by liquid binders with high carbon contents is presumably related to special features of the Co-based binder alloys oversaturated with carbon at sintering temperatures. View Full-Text
Keywords: cemented carbides; nanoparticles; model binder alloys; tungsten carbide; carbon content cemented carbides; nanoparticles; model binder alloys; tungsten carbide; carbon content
Show Figures

Graphical abstract

MDPI and ACS Style

Konyashin, I.; Zaitsev, A.; Meledin, A.; Mayer, J.; Loginov, P.; Levashov, E.; Ries, B. Interfaces between Model Co-W-C Alloys with Various Carbon Contents and Tungsten Carbide. Materials 2018, 11, 404.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map

1
Back to TopTop