Fig. 1 Tungsten carbide particles produced by the carburization of tungsten and carbon. 10,000× More

Fig. 1 Tungsten carbide particles produced by the carburization of tungsten and carbon. 10,000× More

Fig. 1 Plasma-sprayed tungsten carbide/cobalt coating in as-received condition. Original magnification: 200× More

Fig. 2 Plasma-sprayed tungsten carbide/cobalt coating shown in Fig. 1 after repreparing (regrinding and repolishing). Original magnification: 200× More

Fig. 3 Plasma-sprayed tungsten carbide/cobalt coating shown in Fig. 2 after second regrind/repolish. Original magnification: 200× More

Fig. 4 High-energy plasma-sprayed tungsten carbide/cobalt coating prepared similarly to the coating shown in Fig. 2 . Original magnification: 200× More

Fig. 5 High-energy plasma-sprayed tungsten carbide/cobalt coating prepared similarly to the coating shown in Fig. 3 . Original nification: 200× More

Fig. 6 High-velocity oxyfuel-sprayed tungsten carbide/cobalt coating prepared similarly to the coating shown in Fig. 2 . Original magnification: 200× More

Fig. 7 High-velocity oxyfuel-sprayed tungsten carbide/cobalt coating prepared similarly to the coating shown in Fig. 3 . Original magnification: 200× More

Fig. 16 Edge rounding of tungsten carbide/cobalt coating. Original magnification: 200× More

Fig. 38 Tungsten carbide/cobalt coating prepared with high-napped cloth, diamond abrasive, and water-based lubricant. Original magnification: 200× More

Fig. 39 Tungsten carbide/cobalt coating prepared with high-napped cloth, diamond abrasive, and oil-based lubricant. Original magnification: 200× More

Fig. 40 Fine tungsten carbide/cobalt coating prepared using diamond. Original magnification: 200× More

Fig. 41 Fine tungsten carbide/cobalt coating prepared using colloidal silica. Original magnification: 200× More

Fig. 42 Coarse tungsten carbide/cobalt coating polished with 1 μm polycrystalline water-based diamond suspension on a napless cloth for long times (>15 min) at 150 rpm, 35 kPa (5 psi) per 32 mm (1 1 4 in.) mount. Original magnification: 200× More

Fig. 43 Fine tungsten carbide/cobalt coating polished with 1 μm diamond suspension on a napless cloth at 150 rpm, 35 kPa (5 psi) per 32 mm (1 1 4 in.) mount for 2 min. Note that the apparent pores are associated with carbide or near-carbide fracturing. Original magnification: 500× More

Fig. 3 Digital micrograph of cross section of cored tungsten-carbide-base wire. Original magnification: 35×. Courtesy of Alberta Innovates—Technology Futures More

Fig. 8 Low-stress abrasion test data for tungsten-carbide-base overlays, deposited using plasma-transferred arc welding (PTAW) and gas metal arc welding (GMAW). The coupons underwent the modified version of the ASTM G65 standard, whereby two tests are conducted on the same sample. Courtesy More

Fig. 10 Wear scar of tungsten carbide metal-matrix composite produced by low-stress abrasion testing. The matrix is preferentially removed, with slight chipping of the primary carbide. Original magnification: 700×. Courtesy of Alberta Innovates—Technology Futures More

Fig. 11 Wear scar of tungsten carbide metal-matrix composite produced by abrasion testing with a high-contact stress. The tungsten carbide particles were subject to significant fracturing. Original magnification: 700×. Courtesy of Alberta Innovates—Technology Futures More