Facet-dependent interfacial segregation behavior of V-doped WC-Co cemented carbides

Faceting/Roughening of WC/Binder Interfaces in Cemented Carbides: A Review

“…The thickness of the adsorption layers slightly increased with an increase in VC concentration from 2 to 6 wt.% ( Figure 6 ). The interfacial vanadium segregation in V-doped WC-Co cemented carbides is facet-dependent [ 33 ]. The V-doped WC-Co cemented carbide samples were manufactured via vacuum sintering [ 33 ].…”

“…The interfacial vanadium segregation in V-doped WC-Co cemented carbides is facet-dependent [ 33 ]. The V-doped WC-Co cemented carbide samples were manufactured via vacuum sintering [ 33 ]. The WC (4.0 μm), VC (1.5 μm), and Co (0.8 μm) powders were used.…”

“…In contrast, the basal planes of WC grains contained a segregation bilayer with a higher vanadium concentration of about 25 at.% ( Figure 8 ). Moreover, the crystallographic dependence of interfacial segregation is valid for grain and interphase boundaries because grain boundaries frequently possess prismatic or basal facets of tungsten carbide grains [ 33 ].…”

Computing grain boundary “phase” diagrams

“…complexions) at GBs are of broad importance to materials science. The discovery of interfacial phase-like behaviors provided new insights into the understandings of a spectrum of long-standing scientific mysteries, for example, origins and atomic mechanisms of activated sintering of ceramics and refractory metals, [5][6][7][8][9][10][11] liquid metal embrittlement of Ni-Bi and Al-Ga [52,53,[63][64][65] as well as the classical GB embrittlement of Bi versus S-doped Ni (Figure 2), [52][53][54] and abnormal grain growth in Al 2 O 3 and Ni-S. [54,56,57] IGFs and other GB complexions are also known to affect the toughness, strength, fatigue, and wear resistance of Si 3 N 4 , SiC, and Al 2 O 3 and other ceramics, [9,23,24,27,44,66,67] the hot strength and creep and oxidation resistance of various structural ceramics, [68][69][70][71][72][73][74][75][76] superplasticity of zirconia, [77] grain growth and mechanical properties of WC-based cermets, [55,[78][79][80] the stability and mechanical properties of nanocrystalline alloys, [81][82]…”

“…The discovery of interfacial phase‐like behaviors provided new insights into the understandings of a spectrum of long‐standing scientific mysteries, for example, origins and atomic mechanisms of activated sintering of ceramics and refractory metals, [ 5–11 ] liquid metal embrittlement of Ni–Bi and Al–Ga [ 52,53,63–65 ] as well as the classical GB embrittlement of Bi versus S‐doped Ni (Figure 2), [ 52–54 ] and abnormal grain growth in Al 2 O 3 and Ni–S. [ 54,56,57 ] IGFs and other GB complexions are also known to affect the toughness, strength, fatigue, and wear resistance of Si 3 N 4 , SiC, and Al 2 O 3 and other ceramics, [ 9,23,24,27,44,66,67 ] the hot strength and creep and oxidation resistance of various structural ceramics, [ 68–76 ] superplasticity of zirconia, [ 77 ] grain growth and mechanical properties of WC‐based cermets, [ 55,78–80 ] the stability and mechanical properties of nanocrystalline alloys, [ 81–91 ] corrosion of synroc, [ 92 ] the electrical resistance of ruthenate thick‐film resistors, [ 93 ] the coercivity of Nd–Fe–B magnets, [ 94 ] the nonlinear I–V character of ZnO‐based varistors, [ 1,42,43 ] the critical current of YBCO superconductors, [ 95 ] the ionic conductivity of solid electrolytes, [ 96–98 ] and performance of various battery electrode materials, [ 99–102 ] amongst other structural and functional properties. [ 12,13,27,50,103 ]…”