What is the chemical stability of niobium carbide

What is NbC powder?

Niobium carbide is an environment-friendly cubic crystal with a metallic appeal 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 corundum), and also its chemical security is great (it is stable at one 000 ~ 1 100 ℃ and swiftly oxidizes to niobium pentoxide above one 100 ℃). Insoluble substances are hot and also cool hydrochloric acid, sulfuric acid, and also nitric acid, as well as they are just soluble in the hot combined option of hydrofluoric acid and nitric acid. Niobium carbide is easy to thaw in titanium carbide, zirconium carbide, tungsten carbide, as well as other compounds, leading to an isomorphic strong solution, so it can be made use of to make cermet, heat-resistant alloy, and also sealed carbide. The cemented carbide with niobium carbide has refined grain and enhanced all-around efficiency. The cutting devices made of it additionally have excellent thermal firmness, thermal shock resistance, as well as thermal oxidation resistance.

? As one of the raw products of composite ceramic products, composite ceramic materials constructed from composite ceramic materials are typically utilized in wear-resistant components, cutting devices, electrodes, as well as various other fields since of their high hardness, high melting factor, exceptional chemical stability, and also electric conductivity.

Sealed carbide can not just be made use of as an inhibitor of cemented carbide grain growth but additionally create the third spread stage except WC and also Co along with other carbides, which can dramatically boost the thermal hardness, thermal shock resistance, warm pressing resistance and also oxidation resistance of concrete carbide. Niobium carbide can be utilized to prepare concrete carbide device materials with superb reducing performance due to its advantages of boosting the firmness and improving the fracture sturdiness of the alloy.

The hard niobium carbide tough stage of the surfacing-covered electrode goes into the framework of the emerging layer, which gives the welding layer a great wear-resistant skeletal system and also greatly improves the wear resistance. The wear resistance of this protected electrode appearing wear-resistant alloy is 1.2 ~ 1.8 times greater than that of quenched No. 45 steel (HRC50) and 2.4 ~ 3.6 times greater than Fe-Cr-C-B wear-resistant alloy. At the same time, the hard-facing layer can be welded externally of the work surface without preheating, and also the tiny cracks created on the surface can launch the tension of the hard-facing layer. They will certainly not spread out into the base product. D. Adding a little quantity of niobium carbide to the steel strengthening stage during steelmaking can achieve the impacts of precipitation fortifying and fine grain conditioning, thus improving the detailed mechanical residential or commercial properties of steel.

Aerospace parts are utilized as prep work products for numerous aerospace devices parts, such as generator rotors, gas tails, blades, engine nozzle linings, as well as architectural participants of atomic power plants.

Chemical homes of NbC powder

Niobium carbide is a green cubic crystal with a metallic radiance belonging to a sodium chloride-type cubic crystal system. The relative density is 8.47, the lattice constant a= 0.447 nm, and also the melting factor is 2300 ℃. The microhardness is > 235GPA (> 2400kg/mm2), which is more difficult than diamond. The flexible modulus is 338000N/mm2; the thermal growth coefficient is 6.65×& times; 10-6/ K, the thermal conductivity is 14w/( m? K), as well as the generated warmth of 1 chemical book is 40.7 kJ/mol. The details heat capacity is 36.8 J/( mol? K), and also the resistivity is 35 μ ω& mu; & omega;? cm 。 Insoluble in warm as well as cool hydrochloric acid, sulfuric acid, and nitric acid, soluble in a warm blended service of hydrofluoric acid and also nitric acid. It is stable at 1000 ~ 1100 ℃ as well as quickly oxidizes to niobium pentoxide above 1100 ℃. Niobium carbide is easy to thaw in titanium, zirconium carbide, tungsten carbide, and other compounds, developing an isomorphic strong service mixture.

The cost of NbC powder

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NbC powder provider

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