The dependence of the contiguity of WC on Co content and its independence from WC grain size in WC–Co alloys

Luyckx, S.; Love, Anne D.

doi:10.1016/j.ijrmhm.2005.04.012

Cited by 75 publications

(37 citation statements)

References 9 publications

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“…Accordingly, substantial performance differences result, especially in properties such as hardness, strength, and elastic modulus. This is especially true for the WC-Co cemented carbides [16,17].…”

Section: Typical Microstructuresmentioning

confidence: 96%

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Review: liquid phase sintering

2009

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Liquid phase sintering (LPS) is a process for forming high performance, multiple-phase components from powders. It involves sintering under conditions where solid grains coexist with a wetting liquid. Many variants of LPS are applied to a wide range of engineering materials. Example applications for this technology are found in automobile engine connecting rods and high-speed metal cutting inserts. Scientific advances in understanding LPS began in the 1950s. The resulting quantitative process models are now embedded in computer simulations to enable predictions of the sintered component dimensions, microstructure, and properties. However, there are remaining areas in need of research attention. This LPS review, based on over 2,500 publications, outlines what happens when mixed powders are heated to the LPS temperature, with a focus on the densification and microstructure evolution events.

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Section: Typical Microstructuresmentioning

confidence: 96%

“…Figure 29 plots the contiguity variation with dihedral angle for a solid volume fraction of 0.8 with the effect from a typical grain size distribution. For nonspherical grains, the grain contacts are variable in size and shape, but contiguity exhibits a similar variation with solid content [17,97].…”

Section: Grain Coordination Contiguity and Connectivitymentioning

confidence: 98%

Review: liquid phase sintering

2009

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“…Following Roebuck and Bennett's approach [17], an extensive contiguity data collection from literature was here conducted [17,20,[23][24][25][26][27][28][29][30][31][32][33] and C WC values were plotted as a function of binder volume content (Figure 4). It was found that gathered data follows a similar trend to that described in previous works [1,17].…”

Section: Assessment Of Contiguity Of the Carbide Phasementioning

confidence: 99%

“…Possible reasons for this large contiguity dispersion are the grain size influence as well as discrepancies associated with identification and definition of grain boundaries [1,17]. [17,20,[23][24][25][26][27][28][29][30][31][32][33]). Full lines correspond to the best fitting curves proposed in pervious works (red line) [1,17] and in this investigation (green line).…”

Section: Assessment Of Contiguity Of the Carbide Phasementioning

confidence: 99%

“…Furthermore, contiguity depends on additional factors such as the carbide particle shape [8,18] or the manufacturing conditions, including sintering time and temperature [19]. On the other hand, other authors sustain that contiguity is exclusively dependent on binder content, and consequently is not influenced by grain size [20]. This statement is based on an experimental investigation of contiguity, by means of the LI method, carried out in a wide range of hardmetal grades.…”

Section: Introductionmentioning

confidence: 99%

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Implementation of an effective time-saving two-stage methodology for microstructural characterization of cemented carbides

Tarragó

Coureaux

Torres

et al. 2016

International Journal of Refractory Metals and Hard Materials

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Linear intercept on scanning electron microscopy micrographs is the most commonly used measurement method to determine carbide grain size and contiguity in WC-Co cemented carbides (hardmetals). However, it involves manual time-consuming measurements and is critically dependent on the quality of the micrographs as well as on the identification and definition of grain boundaries. In this study a two-stage methodology for microstructural characterization of hardmetals is presented.

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