What is the chemical stability of niobium carbide

What is NbC powder?

Niobium carbide is a green cubic crystal with a metallic luster belonging to a salt chloride-type cubic crystal system. Its melting point is high, its solidity is high (microhardness is 235GPa, which is harder than diamond), as well as its chemical security is great (it is secure at one 000 ~ 1 100 ℃ and also swiftly oxidizes to niobium pentoxide above one 100 ℃). Insoluble compounds are cold and hot hydrochloric acid, sulfuric acid, as well as nitric acid, and also they are just soluble in the warm mixed solution of hydrofluoric acid and also nitric acid. Niobium carbide is easy to melt in titanium carbide, zirconium carbide, tungsten carbide, and also other compounds, resulting in an isomorphic strong option, so it can be used to produce cermet, heat-resistant alloy, as well as sealed carbide. The cemented carbide with niobium carbide has refined grain as well as enhanced all-around efficiency. The cutting devices made of it also have excellent thermal solidity, thermal shock resistance, as well as thermal oxidation resistance.

? As one of the raw materials of composite ceramic materials, composite ceramic products constructed from composite ceramic materials are usually utilized in wear-resistant parts, reducing tools, electrodes, and also various other areas because of their high hardness, high melting point, superb chemical security, and electric conductivity.

Sealed carbide can not only be utilized as a prevention of cemented carbide grain growth yet likewise create the 3rd dispersed phase except WC and also Carbon monoxide together with various other carbides, which can significantly boost the thermal hardness, thermal shock resistance, warm pushing resistance as well as oxidation resistance of concrete carbide. Niobium carbide can be made use of to prepare cemented carbide device materials with excellent cutting performance because of its benefits of increasing the solidity and improving the crack durability of the alloy.

The tough niobium carbide tough phase of the surfacing-covered electrode enters the structure of the surfacing layer, which gives the welding layer an excellent wear-resistant skeletal system and greatly improves the wear resistance. The wear resistance of this covered electrode appearing wear-resistant alloy is 1.2 ~ 1.8 times greater than that of quenched No. 45 steel (HRC50) as well as 2.4 ~ 3.6 times higher than Fe-Cr-C-B wear-resistant alloy. At the exact same time, the hard-facing layer can be welded externally of the work surface without pre-heating, as well as the tiny fractures generated on the surface can release the stress and anxiety of the hard-facing layer. They will not spread right into the base product. D. Including a small amount of niobium carbide to the steel enhancing stage during steelmaking can achieve the results of precipitation strengthening and great grain fortifying, hence enhancing the detailed mechanical buildings of steel.

Aerospace components are made use of as preparation materials for many aerospace equipment parts, such as generator blades, gas tails, blades, engine nozzle cellular linings, and structural participants of nuclear reactors.

Chemical properties of NbC powder

Niobium carbide is an eco-friendly cubic crystal with a metal radiance belonging to a sodium chloride-type cubic crystal system. The relative density is 8.47, the lattice constant a= 0.447 nm, and the melting point is 2300 ℃. The microhardness is > 235GPA (> 2400kg/mm2), which is harder than corundum. 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 also the produced heat of 1 chemical publication is 40.7 kJ/mol. The certain 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 mixed remedy of hydrofluoric acid and also nitric acid. It is steady at 1000 ~ 1100 ℃ and quickly oxidizes to niobium pentoxide above 1100 ℃. Niobium carbide is simple to melt in titanium, zirconium carbide, tungsten carbide, and also various other compounds, developing an isomorphic strong service combination.

The rate of NbC powder

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NbC powder distributor

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