What is the chemical stability of niobium carbide

What is NbC powder?

Niobium carbide is a green cubic crystal with a metal luster coming from a salt chloride-type cubic crystal system. Its melting point is high, its firmness is high (microhardness is 235GPa, which is more challenging than corundum), and 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 hot and cold hydrochloric acid, sulfuric acid, as well as nitric acid, as well as they are only soluble in the hot mixed remedy of hydrofluoric acid and nitric acid. Niobium carbide is very easy to melt in titanium carbide, zirconium carbide, tungsten carbide, and other substances, leading to an isomorphic solid option, so it can be made use of to manufacture cermet, heat-resistant alloy, and cemented carbide. The sealed carbide with niobium carbide has actually improved grain as well as boosted well-rounded performance. The cutting tools constructed from it additionally have good thermal solidity, thermal shock resistance, and also thermal oxidation resistance.

? As one of the raw materials of composite ceramic materials, composite ceramic products made from composite ceramic materials are commonly made use of in wear-resistant parts, cutting tools, electrodes, and various other areas due to their high firmness, high melting point, superb chemical security, and also electric conductivity.

Sealed carbide can not only be used as an inhibitor of concrete carbide grain growth yet likewise develop the 3rd dispersed stage other than WC as well as Co together with other carbides, which can significantly improve the thermal firmness, thermal shock resistance, warm pushing resistance as well as oxidation resistance of concrete carbide. Niobium carbide can be used to prepare cemented carbide tool materials with excellent cutting performance as a result of its benefits of enhancing the firmness and boosting the crack sturdiness of the alloy.

The tough niobium carbide difficult phase of the surfacing-covered electrode enters the framework of the surfacing layer, which gives the welding layer an excellent wear-resistant skeletal system as well as considerably 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) as well as 2.4 ~ 3.6 times higher 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 workpiece without pre-heating, and also the little fractures created on the surface can release the tension of the hard-facing layer. They will not spread right into the base product. D. Adding a percentage of niobium carbide to the steel enhancing stage throughout steelmaking can attain the results of precipitation strengthening as well as fine grain strengthening, thus boosting the extensive mechanical residential or commercial properties of steel.

Aerospace parts are utilized as prep work products for lots of aerospace equipment parts, such as turbine blades, gas rudders, blades, engine nozzle linings, as well as structural members of nuclear reactors.

Chemical residential or commercial properties of NbC powder

Niobium carbide is an environment-friendly cubic crystal with a metallic luster coming from a salt chloride-type cubic crystal system. The relative density is 8.47, the latticework constant a= 0.447 nm, and also 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), as well as the generated heat of 1 chemical book 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 cold and hot hydrochloric acid, sulfuric acid, and nitric acid, soluble in a warm combined remedy of hydrofluoric acid and also nitric acid. It is steady at 1000 ~ 1100 ℃ as well as rapidly oxidizes to niobium pentoxide over 1100 ℃. Niobium carbide is simple to melt in titanium, zirconium carbide, tungsten carbide, as well as other compounds, forming an isomorphic strong service mix.

The price of NbC powder

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