2020
DOI: 10.1016/j.ijrmhm.2020.105306
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Interface characteristics in cemented carbides with alternative binders

Abstract: Cemented tungsten carbides with Co, Ni or Fe binders were studied by transmission electron microscopy.Particular attention was paid to phase and grain boundaries. A striking feature is the high frequency of coherent carbide/binder interfaces with Fe. The Fe rich binder adopts an epitaxy orientation relationship with prismatic facets of WC, with a parametric misfit of about 1.5%. A special orientation relationship with basal facets of WC grains is sometimes observed with Ni binder, as already noticed for Co. It… Show more

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Cited by 11 publications
(6 citation statements)
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“…To study the grain boundary segregation, STEM/EDS maps were acquired using a beam size of 1 nm, a magnification of 500 000 and a map size of 512x512 or 256x256 pixels, resulting in a pixel size of 0.5 or 1 nm. The segregation width in the boundaries was estimated using a semi-quantitative method [16]. The hardness was measured by Vickers macrohardness with an indentation load of 30 kg.…”
Section: Characterizationmentioning
confidence: 99%
“…To study the grain boundary segregation, STEM/EDS maps were acquired using a beam size of 1 nm, a magnification of 500 000 and a map size of 512x512 or 256x256 pixels, resulting in a pixel size of 0.5 or 1 nm. The segregation width in the boundaries was estimated using a semi-quantitative method [16]. The hardness was measured by Vickers macrohardness with an indentation load of 30 kg.…”
Section: Characterizationmentioning
confidence: 99%
“…Owing to the resolution of the maps, grain boundary segregation can be detected but segregation width cannot be directly measured. To evaluate the segregation level, a geometrical method was used, slightly different from the one applied in [23] due to solubility of Cr in WC [24]. A small box including the boundary in the center was delimited in the acquired maps (Fig.…”
Section: Methodsmentioning
confidence: 99%
“…Considering the reasons highlighted, it is necessary to find new solutions that allow the replacement of the cobalt binder by a more economical alternative, less toxic and with equal or superior properties. The alternative with the greatest potential is the total or partial replacement of cobalt by other transition metals such as Fe, Cr and Ni [ 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 ]. The traditional WC-Co has also some limitations with respect to corrosion resistance and in that sense the use of Fe and Ni based binders has been the target of research to improve this property in carbides [ 25 , 26 , 27 ].…”
Section: Introductionmentioning
confidence: 99%