What is the chemical stability of niobium carbide?

Byadmin

Jan 14, 2023

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What does NbC powder mean?
Niobium carbonide is an green cubic crystal with metallic luster. It belongs to a type of cubic crystal that contains sodium chloride. Its melting temperature is high and it is hard (microhardness is 23GPa). Additionally, the chemical stability of this cubic crystal is excellent (it’s stable at 1 000-1 100, and rapidly oxidizes into niobium pentoxide at above 100). The insoluble substances include hot and cold hydrochloric, sulfuric, and nitric. These compounds are only soluble when they are mixed with hot hydrofluoric or nitric. The melting of Niobium carbide in titanium carbide or zirconium carbonide produces an isomorphic liquid solution. It can also be used in the production of cemented carbide, heat-resistant alloy, and cermet. Cemented carbide that contains niobium caride can have refined grains and better performance. This cutting tool has good thermal hardness and resistance to thermal shock.


How is NbC powder applied?
Because of their hardness and high melting point as well as excellent chemical stability and electrical conductivity, composite ceramic materials from composite clay materials are used as one of the raw materials for composite ceramic products.
Cemented carbonide can be used to inhibit cemented-carbide grain growth. It can also be combined with other carbides to form the third dispersed phases, WC and Co. This will significantly increase the thermal hardness and thermal shock resistance as well as the resistance against hot pressing and oxidation. Cemented carbide tool material can be prepared using Niobium carbide. This is due to its benefits of improving hardness as well as increasing fracture toughness.
The hard niobium carbonide hard phase in the surfacing-covered electro enters the structure and enhances its wear resistance. This wear resistance alloy of covered electrode surfacing is wear-resistant, 1.21.8x greater than the HRC50 quenched No.45 Steel and 2.53.6x more than Fe-Cr–C-B. The surface of the workpiece can have the hard-facing layers welded directly on it. Additionally, tiny cracks that form on the top can help release the strain of the hardfacing layers. They won’t spread to the base materials. The addition of small amounts of niobium carbonide during steelmaking to the steel strength phase can produce the benefits of precipitation strengthening.

Many aerospace components can be used to prepare parts for other equipment, like turbine rotors or gas rudders.

Chemical Properties of NbC dust
The green cubic crystal Niobium carbide has a metallic luster and is of sodium chloride type. The relative density of the cubic crystal is 8.47. There is a lattice constant at 0.447nm and a melting point at 2300. It is much harder than corundum because the microhardness of >235GPA (>2400kg/mm2) is higher. The elastic modulus for corundum is 338000N/mm2 and the thermal expansion factor is 6.65×10-6/K. K; and the generated heat for 1 chemical books is 40.7kJ/mol. The specific heat potential is 36.8J/mol K and the resistivity of 35 m? It is insoluble in both hot and cold sulfuric acids, hot and low hydrochloric acids, and nitric Acid. However, it can be dissolved in a mixture of hot hydrofluoric acid or nitric. The stable range is between 1000 and 1100, but it quickly oxidizes to Niobium pentoxide over 1100. The melting of niobium carbide in titanium, zirconium, or tungsten carbide creates an isomorphic solution.

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