What is the chemical stability of niobium carbide
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What is NbC powder?
Niobium carbide is an eco-friendly cubic crystal with a metal appeal belonging to a sodium chloride-type cubic crystal system. Its melting factor is high, its firmness is high (microhardness is 235GPa, which is more challenging than corundum), as well as its chemical stability is excellent (it is stable at one 000 ~ 1 100 ℃ and swiftly oxidizes to niobium pentoxide over one 100 ℃). Insoluble compounds are cold and hot hydrochloric acid, sulfuric acid, and nitric acid, as well as they are only soluble in the warm combined 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, causing an isomorphic strong remedy, so it can be made use of to manufacture cermet, heat-resistant alloy, as well as sealed carbide. The sealed carbide with niobium carbide has refined grain and enhanced well-rounded performance. The cutting devices constructed from it likewise have great thermal solidity, thermal shock resistance, and also thermal oxidation resistance.
< img alt="" src= "https://i02piccdn.sogoucdn.com/af0360caa3637125" design= "width: 540px; elevation: 405px;"/ > What is NbC powder made use of for
? As one of the raw materials of composite ceramic materials, composite ceramic products made of composite ceramic materials are frequently utilized in wear-resistant components, cutting devices, electrodes, and also various other fields as a result of their high firmness, high melting factor, excellent chemical stability, as well as electrical conductivity.
Sealed carbide can not just be used as a prevention of cemented carbide grain growth yet also develop the 3rd dispersed stage except WC and also Co together with other carbides, which can significantly boost the thermal hardness, thermal shock resistance, hot pushing resistance and oxidation resistance of concrete carbide. Niobium carbide can be utilized to prepare cemented carbide tool products with excellent cutting efficiency because of its advantages of increasing the solidity as well as boosting the crack durability of the alloy.
The hard niobium carbide tough phase of the surfacing-covered electrode gets in the structure of the appearing layer, which gives the welding layer a great wear-resistant skeleton and greatly improves the wear resistance. The wear resistance of this covered electrode surfacing wear-resistant alloy is 1.2 ~ 1.8 times more than that of quenched No. 45 steel (HRC50) and 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 bonded externally of the work surface without pre-heating, as well as the tiny fractures generated externally can launch the stress and anxiety of the hard-facing layer. They will not spread out right into the base product. D. Adding a percentage of niobium carbide to the steel strengthening stage during steelmaking can achieve the impacts of precipitation strengthening and fine grain conditioning, hence boosting the extensive mechanical buildings of steel.
Aerospace elements are used as preparation materials for several aerospace devices components, such as turbine rotors, gas rudders, blades, engine nozzle linings, as well as structural participants of atomic power plants.
Chemical homes of NbC powder
Niobium carbide is an environment-friendly cubic crystal with a metallic radiance coming from a sodium chloride-type cubic crystal system. The family member thickness is 8.47, the latticework constant a= 0.447 nm, and also 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), as well as the generated warm of 1 chemical book is 40.7 kJ/mol. The particular warm capability 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 combined service of hydrofluoric acid as well as nitric acid. It is steady at 1000 ~ 1100 ℃ and also quickly oxidizes to niobium pentoxide over 1100 ℃. Niobium carbide is simple to melt in titanium, zirconium carbide, tungsten carbide, and also various other compounds, forming an isomorphic strong service mix.
The rate of NbC powder
The market cost of NbC powder is influenced by different variables. Currently, its market price is in the procedure of vibrant change. If you require it, please contact us any time.
NbC powder vendor
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