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What is the chemical stability of niobium carbide

What is NbC powder?

Niobium carbide is an eco-friendly cubic crystal with a metallic gloss coming from a sodium chloride-type cubic crystal system. Its melting factor is high, its hardness is high (microhardness is 235GPa, which is harder than diamond), and its chemical security is great (it is secure at one 000 ~ 1 100 ℃ as well as swiftly oxidizes to niobium pentoxide above one 100 ℃). Insoluble compounds are hot and cold hydrochloric acid, sulfuric acid, and also nitric acid, as well as they are only soluble in the hot mixed remedy of hydrofluoric acid and also nitric acid. Niobium carbide is easy to thaw in titanium carbide, zirconium carbide, tungsten carbide, and also other substances, leading to an isomorphic strong option, so it can be made use of to make cermet, heat-resistant alloy, and also sealed carbide. The sealed carbide with niobium carbide has improved grain as well as boosted all-around performance. The cutting devices constructed from it also have excellent thermal firmness, thermal shock resistance, and also thermal oxidation resistance.

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< img alt="" src= "https://i02piccdn.sogoucdn.com/af0360caa3637125" design= "size: 540px; elevation: 405px;"/ > What is NbC powder used for

? As one of the raw materials of composite ceramic materials, composite ceramic materials made of composite ceramic materials are often used in wear-resistant components, cutting devices, electrodes, and also various other fields as a result of their high hardness, high melting factor, outstanding chemical stability, and also electric conductivity.

Sealed carbide can not only be made use of as a prevention of cemented carbide grain growth but also create the 3rd spread phase except WC and also Co together with various other carbides, which can considerably improve the thermal firmness, thermal shock resistance, hot pressing resistance as well as oxidation resistance of cemented carbide. Niobium carbide can be made use of to prepare concrete carbide device materials with exceptional reducing performance as a result of its advantages of boosting the firmness as well as improving the crack toughness of the alloy.

The tough niobium carbide difficult phase of the surfacing-covered electrode enters the framework of the emerging layer, which offers the welding layer an excellent wear-resistant skeletal system and substantially boosts the wear resistance. The wear resistance of this protected electrode surfacing 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 same time, the hard-facing layer can be welded externally of the work surface without preheating, as well as the little fractures created on the surface can launch the anxiety of the hard-facing layer. They will certainly not spread into the base material. D. Including a small amount of niobium carbide to the steel enhancing stage during steelmaking can accomplish the results of precipitation conditioning and great grain conditioning, thus enhancing the comprehensive mechanical buildings of steel.

Aerospace components are utilized as prep work products for several aerospace tools components, such as wind turbine blades, gas rudders, blades, engine nozzle linings, as well as structural participants of atomic power plants.

Chemical buildings of NbC powder

Niobium carbide is an eco-friendly cubic crystal with a metallic luster belonging to a sodium chloride-type cubic crystal system. The relative density is 8.47, the latticework constant a= 0.447 nm, as well as the melting point is 2300 ℃. The microhardness is > 235GPA (> 2400kg/mm2), which is more difficult than diamond. The elastic modulus is 338000N/mm2; the thermal growth 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 details warmth capability is 36.8 J/( mol? K), as well as 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 warm mixed service of hydrofluoric acid as well as nitric acid. It is stable at 1000 ~ 1100 ℃ and quickly oxidizes to niobium pentoxide over 1100 ℃. Niobium carbide is very easy to thaw in titanium, zirconium carbide, tungsten carbide, as well as other substances, forming an isomorphic solid option combination.


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