Diffusion and solubility of Cr in WC

Transition Metal Solubilities in WC in Cemented Carbide Materials

“…Of this, very little was known before due to reasons described in the “.” As far as we know, only Mo and Cr solubility in WC have been measured earlier. Brieseck et al 11 studied a WC–Cr 3 C 2 diffusion couple and estimated a Cr solubility in WC of 0.8–1.5 at.% at temperatures between 1833 and 2033 K. These values compare well with our theoretical results from Table IV using a solid phase as reference. This corresponds to a Cr 3 C 2 equilibrium as in the experimental conditions used by Brieseck et al 11 In similar experiments, these authors could not observe any Ti, V, Nb, or Ta dissolved in the WC.…”

“…Apart from this, the solubility of transition metals in WC has so far been neglected in thermodynamic calculations on the assumption of being very small. In the literature, recent experimental investigations have indicated a small, yet measurable, Cr solubility in WC 11,12 . Except for this work, no experimental data of the transition metal solubility in WC appear to exist.…”

Effect of Cr addition on solid state sintering of WC–Co alloys

“…It is now established that Cr mainly dissolved in Co also has a small solubility in WC [32,33]. The presence of Cr atoms in WC and Co lattices results in a modified atomic bonding through the interface.…”

Coatings by Thermal Spray

“…The W 2 C shows the ability to replace large amounts of tungsten by chromium (Eremenko, Velikanova, & Bondar, 1986;Gladyshevskii et al, 1967;Hinnüber & Rüdiger, 1953;Stecher, Benesovsky, & Nowotny, 1964). The formation of (W,Cr) 2 C has been observed in hot-pressed WC-Cr 3 C 2 specimen (Hinnüber & Rüdiger, 1953) and as a result of annealing of Cr 3 C 2 -WC diffusion couples (Brieseck, Bohn, & Lengauer, 2010). However, there is insufficient knowledge about the influence of chromium on the homogeneity range of W 2 C and its properties with changing chromium content.…”