Graded metal-carbide composites produced by solid state transformations in VC-coated Ni

Experimental Liquidus Surface Projection and Isothermal Section at 1000 °C of the V-Ni-C System

“…The EDX overall (analyses of large areas at low magnifications, to give an overall alloy composition) and phase analyses for the as-cast alloys are given in Table 1 (where * denotes a phase with non-stoichiometric compositions), and Table 2 shows the solidification reactions of the as-cast alloys. Figure 4,5,6,7,8,9,10,11,12,13,14,15,16 and 17 show the microstructures of selected alloys. Depending on the alloy compositions, the primary phases were graphite, * VC x (which transformed to * V 8 C 7 (Fig.…”

“…[3][4][5] Its abrasion resistance is directly related to its high hardness, which is superior to all other similar compounds of transition metals in groups IV B and V B, except TiC. [6] Vanadium carbide is cheaper, less dense, harder and tougher than the conventional tungsten carbide, [7] and WC-VC-Co has higher hardness for comparable toughness than WC-Co of similar cobalt content. [8] Nickel as a binder maintains its ductility at all temperatures below the solidus, [9] has higher hot hardness, higher resistance to thermal cracking, [10] better oxidation resistance [11] and wear performance in corrosive environments than cobalt.…”

“…Also, information on the phase diagram work and structure property relations on V-Ni-C system is limited. [6,[14][15][16][17]…”

Preliminary study of spark plasma sintered VC-Ni alloys

“…Vanadium carbide has outstanding tribological behaviour superior to other similar carbides in Groups IVB and VB, except TiC [1,2]. It is of great significance in industrial applications due to its excellent high temperature strength, high chemical and thermal stability, even at high temperatures.…”

“…Some studies have been done on VC-Ni alloys [2,[14][15][16]. Apata et al [16] produced VC-Ni alloys by casting and V 49.1 C 28.8 Ni 22.1 (at.…”