Abstract
The aim of this work is to make a mechanical and micro structural characterization of a cemented carbide with silicon hardened nickel binder WC-10(Ni-4,1 % Si) processed by powder metallurgy techniques. Micro structural examinations of the specimens indicate the presence of a very low porosity as well as a narrow and relatively constant free mean path between the WC particles. Furthermore, despite the presence of silicon and carbon in the composition, it is not observed the presence of small fractions of non-dissolved SiC and/or free graphite in the microstructure. Vickers hardness and bending tests indicate that the cemented carbide with Ni-4,1% Si binder presented bulk hardness similar to the conventional WC-Co cemented carbides and superior bending resistance and fracture toughness.
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