Tungsten Carbide Nozzle Grain Growth Suppression IV

Some scientists have developed a new type of inhibitor, which adds the insoluble metal carbides into Co-rich matrix to form a solid solution as inhibitors. It decrease the added inhibitors Co-rich carbide substrate drops below the melting point of 1200 ℃, and formed the stable metal / non-metal atoms in the liquid phase Co group, which is W, V, Cr / C radicals.

This radical prevent W atom and C atom from moving between the grains in liquid phase, which decreases the speed of WC grain growth further and improves the compactness and the lifespan of tungsten carbide buttons. Aside from the grain growth inhibitor above, rare earth element also serves as a common inhibitor used to inhibit tungsten carbide grain growth and improve properties of tungsten carbide nozzle during sintering.















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