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What is the chemical stability of niobium carbide

What is NbC powder?

Niobium carbide is a green cubic crystal with a metal radiance coming from a salt chloride-type cubic crystal system. Its melting point is high, its hardness is high (microhardness is 235GPa, which is harder than corundum), as well as its chemical stability is good (it is steady at one 000 ~ 1 100 ℃ and swiftly oxidizes to niobium pentoxide over one 100 ℃). Insoluble substances are cold and hot hydrochloric acid, sulfuric acid, as well as nitric acid, and also they are just soluble in the warm combined option of hydrofluoric acid and also nitric acid. Niobium carbide is very easy to melt in titanium carbide, zirconium carbide, tungsten carbide, and also other substances, causing an isomorphic strong service, so it can be made use of to produce cermet, heat-resistant alloy, and cemented carbide. The cemented carbide with niobium carbide has refined grain as well as boosted well-rounded efficiency. The cutting devices constructed from it likewise have excellent thermal solidity, thermal shock resistance, and thermal oxidation resistance.


What is NbC powder made use of for

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

Cemented carbide can not only be utilized as a prevention of concrete carbide grain growth but likewise create the third distributed stage except WC and Co with each other with other carbides, which can substantially enhance the thermal solidity, thermal shock resistance, hot pressing resistance and also oxidation resistance of cemented carbide. Niobium carbide can be used to prepare cemented carbide tool materials with excellent reducing performance due to its advantages of increasing the firmness and also improving the fracture durability of the alloy.

The tough niobium carbide tough phase of the surfacing-covered electrode enters the structure of the emerging layer, which gives the welding layer a good wear-resistant skeletal system and greatly enhances the wear resistance. The wear resistance of this covered electrode emerging wear-resistant alloy is 1.2 ~ 1.8 times greater than that of quenched No. 45 steel (HRC50) and 2.4 ~ 3.6 times higher than Fe-Cr-C-B wear-resistant alloy. At the same time, the hard-facing layer can be welded on the surface area of the workpiece without preheating, and also the little cracks produced externally can release the stress and anxiety of the hard-facing layer. They will certainly not spread into the base material. D. Adding a percentage of niobium carbide to the steel strengthening stage during steelmaking can attain the impacts of precipitation fortifying and fine grain strengthening, thus enhancing the comprehensive mechanical buildings of steel.

Aerospace components are utilized as prep work products for lots of aerospace equipment parts, such as wind turbine blades, gas tails, blades, engine nozzle cellular linings, and also structural members of nuclear reactors.

Chemical residential properties of NbC powder

Niobium carbide is a green cubic crystal with a metallic appeal belonging to a sodium chloride-type cubic crystal system. The relative thickness is 8.47, the latticework constant a= 0.447 nm, and the melting factor is 2300 ℃. The microhardness is > 235GPA (> 2400kg/mm2), which is more challenging than corundum. The flexible modulus is 338000N/mm2; the thermal development coefficient is 6.65×& times; 10-6/ K, the thermal conductivity is 14w/( m? K), and also the created heat of 1 chemical book is 40.7 kJ/mol. The certain heat capacity is 36.8 J/( mol? K), and also the resistivity is 35 μ ω& mu; & omega;? cm 。 Insoluble in hot and also chilly hydrochloric acid, sulfuric acid, and nitric acid, soluble in a hot mixed service of hydrofluoric acid and nitric acid. It is secure at 1000 ~ 1100 ℃ and also swiftly oxidizes to niobium pentoxide over 1100 ℃. Niobium carbide is simple to thaw in titanium, zirconium carbide, tungsten carbide, as well as various other compounds, forming an isomorphic strong service mixture.

The price of NbC powder

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