Niobium Carbide Powder / NbC Powder (NbC, 99.9%, 1-3um)

Niobium carbide powder is an extremely hard refractory ceramic material used commercially in drill bits for cutting tools. It is usually processed by sintering and is a frequent additive as a grain growth inhibitor in cemented carbides. It has the appearance of a brownish-gray metallic powder with violet reflections. It is highly resistant to corrosion. Niobium carbide is a frequent and intentional product in micro-alloyed steels thanks to its low solubility product in austenite, the lowest of all refractory metal carbides. This means that the micron-sized NbC precipitates are practically insoluble in robberies at all processing temperatures and their position in the grain boundaries helps prevent excessive grain growth in these steels. This is of enormous benefit and the cornerstone of micro-alloyed steels because it is its uniform and very fine grain that guarantees both strength and strength. The only compound that commonly occurs with less solubility and, therefore, the greater potential for limiting the growth of grains of steels is titanium nitride. Depending on the grain size, niobium carbide can burn at 200-800 ° C in the air. A layer of niobium carbide can be created by chemical vapor deposition. Zirconium carbide and niobium carbide can be used as refractory linings in nuclear reactors.