What is the chemical stability of niobium carbide
What is NbC powder?
Niobium carbide is an eco-friendly cubic crystal with a metallic luster belonging to a sodium chloride-type cubic crystal system. Its melting point is high, its firmness is high (microhardness is 235GPa, which is harder than corundum), and also its chemical security is good (it is stable at one 000 ~ 1 100 ℃ and rapidly oxidizes to niobium pentoxide above one 100 ℃). Insoluble materials are cold and hot hydrochloric acid, sulfuric acid, as well as nitric acid, and also they are only soluble in the warm blended option of hydrofluoric acid and nitric acid. Niobium carbide is easy to melt in titanium carbide, zirconium carbide, tungsten carbide, as well as various other compounds, causing an isomorphic strong option, so it can be utilized to make cermet, heat-resistant alloy, and also sealed carbide. The cemented carbide with niobium carbide has actually improved grain and enhanced well-rounded efficiency. The cutting tools constructed from it additionally have good thermal solidity, thermal shock resistance, as well as thermal oxidation resistance.
< img alt="" src= "https://i02piccdn.sogoucdn.com/af0360caa3637125" design= "size: 540px; elevation: 405px;"/ > What is NbC powder used for
? As one of the raw products of composite ceramic products, composite ceramic products made from composite ceramic materials are usually used in wear-resistant components, cutting tools, electrodes, as well as other fields because of their high solidity, high melting point, excellent chemical stability, as well as electric conductivity.
Sealed carbide can not only be made use of as a prevention of concrete carbide grain growth but additionally develop the third dispersed stage other than WC as well as Co along with other carbides, which can significantly improve the thermal hardness, thermal shock resistance, hot pushing resistance and also oxidation resistance of concrete carbide. Niobium carbide can be used to prepare concrete carbide tool products with superb cutting performance due to its benefits of enhancing the hardness and boosting the fracture sturdiness of the alloy.
The difficult niobium carbide hard phase of the surfacing-covered electrode gets in the structure of the surfacing layer, which gives the welding layer an excellent wear-resistant skeleton and also significantly enhances the wear resistance. The wear resistance of this covered electrode emerging wear-resistant alloy is 1.2 ~ 1.8 times more than that of quenched No. 45 steel (HRC50) and also 2.4 ~ 3.6 times more than Fe-Cr-C-B wear-resistant alloy. At the very same time, the hard-facing layer can be welded on the surface of the work surface without pre-heating, and the little fractures created externally can release the stress and anxiety of the hard-facing layer. They will certainly not spread out right into the base product. D. Including a small amount of niobium carbide to the steel strengthening stage during steelmaking can achieve the impacts of precipitation conditioning and fine grain conditioning, thus improving the detailed mechanical residential properties of steel.
Aerospace elements are made use of as preparation products for many aerospace tools components, such as generator rotors, gas tails, blades, engine nozzle cellular linings, as well as architectural participants of atomic power plants.
Chemical buildings of NbC powder
Niobium carbide is a green cubic crystal with a metal luster belonging to a sodium chloride-type cubic crystal system. The relative density 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 diamond. The flexible 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 generated heat of 1 chemical book is 40.7 kJ/mol. The details warm capacity is 36.8 J/( mol? K), and also the resistivity is 35 μ ω& mu; & omega;? centimeters 。 Insoluble in cold and hot hydrochloric acid, sulfuric acid, and also nitric acid, soluble in a hot mixed solution of hydrofluoric acid as well as nitric acid. It is stable at 1000 ~ 1100 ℃ and rapidly oxidizes to niobium pentoxide above 1100 ℃. Niobium carbide is easy to thaw in titanium, zirconium carbide, tungsten carbide, as well as various other compounds, creating an isomorphic solid service blend.
The price of NbC powder
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NbC powder provider
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