Abstract
The mechanical properties of cemented carbides can be tuned by controlling WC grain coarsening and the simultaneous growth of the binder pocket size during the sintering. So far, bulk studies considering this phenomenon are scarce, but here, we report the first very-small angle neutron scattering (VSANS) study on cemented carbides. VSANS is supplemented with electron backscatter diffraction (EBSD) and the microstructural refinement by increasing V-doping (0, 0.02, 0.22, and 0.76 wt%) is quantified. The capability of VSANS as a non-destructive bulk probe for cemented carbides is shown, paving way for forthcoming in-situ studies.
Highlights
Cemented carbides are composite materials manufactured via liquid-phase sintering
The performance of traditional cemented carbide tools relies on the as-sintered composite microstructure consisting of hard tungsten carbide (WC) grains embedded in a ductile Co-based binder phase
The poor penetration of X-ray beams in materials made of heavy elements such as W and Co, makes ultra- or very-small angle neutron scattering (USANS or VSANS) the only viable Small angle scattering (SAS) techniques for the investigations of binder pocket size and WC grain size in cemented carbides as bulk materials
Summary
Cemented carbides are composite materials manufactured via liquid-phase sintering. Their excellent wear resistance, high hardness, and high toughness make them widely used as, for example, metal cutting tools. The performance of traditional cemented carbide tools relies on the as-sintered composite microstructure consisting of hard tungsten carbide (WC) grains embedded in a ductile Co-based binder phase.
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