What is the chemical stability of niobium carbide

What is NbC powder?

Niobium carbide is an environment-friendly cubic crystal with a metallic gloss belonging to a salt chloride-type cubic crystal system. Its melting factor is high, its firmness is high (microhardness is 235GPa, which is tougher than diamond), and its chemical stability is great (it is stable at one 000 ~ 1 100 ℃ and also rapidly oxidizes to niobium pentoxide over one 100 ℃). Insoluble substances are cold and hot hydrochloric acid, sulfuric acid, and nitric acid, as well as they are only soluble in the hot blended remedy of hydrofluoric acid as well as nitric acid. Niobium carbide is very easy to thaw in titanium carbide, zirconium carbide, tungsten carbide, and other compounds, resulting in an isomorphic solid solution, so it can be used to produce cermet, heat-resistant alloy, and also sealed carbide. The sealed carbide with niobium carbide has actually improved grain as well as boosted all-around performance. The cutting tools made from it also have good thermal firmness, thermal shock resistance, and also thermal oxidation resistance.

? As one of the raw materials of composite ceramic materials, composite ceramic products constructed from composite ceramic products are usually utilized in wear-resistant parts, reducing tools, electrodes, as well as other fields due to their high solidity, high melting factor, superb chemical stability, and also electric conductivity.

Sealed carbide can not just be made use of as a prevention of cemented carbide grain growth but also form the 3rd distributed phase other than WC and Carbon monoxide together with various other carbides, which can significantly boost the thermal solidity, thermal shock resistance, hot pressing resistance and oxidation resistance of cemented carbide. Niobium carbide can be used to prepare concrete carbide tool materials with superb reducing performance as a result of its advantages of boosting the firmness and also enhancing the fracture sturdiness of the alloy.

The difficult niobium carbide tough phase of the surfacing-covered electrode enters the framework of the emerging layer, which offers the welding layer a great wear-resistant skeleton and also significantly improves the wear resistance. The wear resistance of this protected electrode emerging wear-resistant alloy is 1.2 ~ 1.8 times more than that of quenched No. 45 steel (HRC50) as well as 2.4 ~ 3.6 times greater than Fe-Cr-C-B wear-resistant alloy. At the exact same time, the hard-facing layer can be welded externally of the workpiece without preheating, and the tiny splits generated externally can launch the stress of the hard-facing layer. They will not spread into the base product. D. Adding a percentage of niobium carbide to the steel strengthening phase during steelmaking can achieve the impacts of precipitation fortifying and great grain fortifying, hence improving the detailed mechanical residential properties of steel.

Aerospace elements are made use of as prep work materials for lots of aerospace tools components, such as turbine rotors, gas tails, blades, engine nozzle linings, and also architectural members of nuclear reactors.

Chemical buildings of NbC powder

Niobium carbide is an environment-friendly cubic crystal with a metallic gloss coming from a sodium chloride-type cubic crystal system. The family member thickness is 8.47, the latticework constant a= 0.447 nm, as well as the melting factor is 2300 ℃. The microhardness is > 235GPA (> 2400kg/mm2), which is tougher than diamond. The elastic modulus is 338000N/mm2; the thermal expansion coefficient is 6.65×& times; 10-6/ K, the thermal conductivity is 14w/( m? K), and the created warm of 1 chemical book is 40.7 kJ/mol. The particular heat capability is 36.8 J/( mol? K), and the resistivity is 35 μ ω& mu; & omega;? cm 。 Insoluble in hot and cold hydrochloric acid, sulfuric acid, and also nitric acid, soluble in a warm blended remedy of hydrofluoric acid and also nitric acid. It is steady at 1000 ~ 1100 ℃ as well as quickly oxidizes to niobium pentoxide above 1100 ℃. Niobium carbide is simple to thaw in titanium, zirconium carbide, tungsten carbide, and also various other substances, forming an isomorphic solid service mixture.

The cost of NbC powder

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NbC powder supplier

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