What is the chemical stability of niobium carbide

What is NbC powder?

Niobium carbide is an environment-friendly cubic crystal with a metallic gloss coming from a sodium 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 security is excellent (it is steady at one 000 ~ 1 100 ℃ and also swiftly oxidizes to niobium pentoxide over one 100 ℃). Insoluble substances are hot and also cool hydrochloric acid, sulfuric acid, and nitric acid, and they are only soluble in the hot mixed remedy of hydrofluoric acid and also nitric acid. Niobium carbide is easy to melt in titanium carbide, zirconium carbide, tungsten carbide, and other substances, resulting in an isomorphic strong service, so it can be used to manufacture cermet, heat-resistant alloy, as well as sealed carbide. The sealed carbide with niobium carbide has actually fine-tuned grain and enhanced all-around efficiency. The cutting tools made from it likewise have great thermal hardness, thermal shock resistance, and also thermal oxidation resistance.

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

Sealed carbide can not just be made use of as a prevention of concrete carbide grain growth however also develop the third distributed phase except WC and also Co along with other carbides, which can dramatically enhance the thermal hardness, thermal shock resistance, warm pushing resistance and also oxidation resistance of cemented carbide. Niobium carbide can be made use of to prepare cemented carbide device materials with exceptional reducing performance as a result of its benefits of raising the hardness and enhancing the crack durability of the alloy.

The tough niobium carbide tough phase of the surfacing-covered electrode enters the framework of the emerging layer, which offers the welding layer an excellent wear-resistant skeletal system as well as greatly enhances the wear resistance. The wear resistance of this covered electrode surfacing wear-resistant alloy is 1.2 ~ 1.8 times greater 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 exact same time, the hard-facing layer can be welded on the surface of the work surface without preheating, and the little cracks created on the surface can launch the stress of the hard-facing layer. They will certainly not spread into the base product. D. Including a percentage of niobium carbide to the steel strengthening stage during steelmaking can attain the impacts of precipitation fortifying and great grain strengthening, therefore enhancing the comprehensive mechanical residential properties of steel.

Aerospace elements are utilized as preparation materials for lots of aerospace devices parts, such as turbine rotors, gas tails, blades, engine nozzle cellular linings, as well as structural members of nuclear reactors.

Chemical residential properties of NbC powder

Niobium carbide is an environment-friendly cubic crystal with a metallic gloss coming from a salt chloride-type cubic crystal system. The family member density is 8.47, the lattice constant a= 0.447 nm, and the melting point is 2300 ℃. The microhardness is > 235GPA (> 2400kg/mm2), which is harder than diamond. 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 produced warmth of 1 chemical publication is 40.7 kJ/mol. The details warmth ability is 36.8 J/( mol? K), and also the resistivity is 35 μ ω& mu; & omega;? cm 。 Insoluble in cold and hot hydrochloric acid, sulfuric acid, and also nitric acid, soluble in a hot combined solution of hydrofluoric acid and nitric acid. It is steady at 1000 ~ 1100 ℃ and swiftly oxidizes to niobium pentoxide above 1100 ℃. Niobium carbide is easy to thaw in titanium, zirconium carbide, tungsten carbide, and also other substances, forming an isomorphic strong option mixture.

The rate of NbC powder

The market rate of NbC powder is impacted by various aspects. Presently, its market price is in the procedure of vibrant change. If you require it, please call us at any time.

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