Chromium Nitride Powder, CrN, CAS 24094-93-7

Chromium Nitride (CrN) Powder stands as the sole nitride material endowed with antiferromagnetic properties, presenting extensive application prospects. HM offers top-notch Chromium Nitride (CrN) powder at a competitive price, serving as an excellent additive in steelmaking alloys. The purity and particle size of the powder can be customized to meet specific requirements.

• Formula: CrN /Cr2N
• Density: 6.14 g/cm³
• Molecular Weight: 66 g/mol
• Melting point: 1282℃
• Mole hardness: 
• CAS: 24094-93-7
• Water soluble: Reaction

Chromium Nitride Powder Chemical Analysis

Chromium Nitride Powder Properties

Chromium Nitride (CrN) Powder has better wear resistance than titanium nitride. The nitrides of chromium are CrN and Cr2N, with CrN in a cubic strain structure and Cr2N in a hexagonal crystal system. CrN is insoluble in water and acid and has good chemical stability. CrN and Cr2N are metallurgical second phases of heat-resistant alloys and are used as strengthening additives, especially for special steels.

• High purity: XRD detection of impurity-free phase, GDMS detection of metal impurity element content is low;
• Distribution concentration: particle size standard normal distribution, no double or multiple peaks, no trailing;

Chromium Nitride Powder Production Process

Chromium Nitride Powder synthetic methods:

•  Low-carbon ferrochrome is nitrided in a vacuum heating furnace at 1150°C to obtain crude ferrochrome nitride, which is then treated with sulfuric acid to remove iron impurities. After filtering, washing, and drying, chromium nitride is obtained. It can also be made by the reaction of ammonia and chromium halide.
• Cr2N is produced by heating the high-purity electrolytic chromium powder in a nitrogen stream at 150 mmHg (1 mmHg = 133.322 Pa) column for 160 h at 1060°C and then expelling the nitrogen and cooling it rapidly.
• The low-carbon ferrochrome was crushed to <3mm and 1000kg was nitrided at 1150°C and nitrogen pressure 0.0987MPa for 24h in a vacuum heating furnace to obtain crude ferrochrome nitride. After cooling and crushing to <0.3mm, 1000kg was taken and nitrided again at 950℃ (other conditions as before). After cooling and crushing to <0.3mm, put into a 1m3 reactor and treated with sulfuric acid for 16h to dissolve the iron. Filtered, washed, and dried. Recovered 109kg of chromium nitride, containing Cr 78.6%, N2 19.7%, O2 0.80%, Fe 0.59%, and C 0.13%. It can also be produced by the reaction of ammonia and chromium halide.

Chromium Nitride Powder Applications

Chromium nitrides have excellent physical and mechanical properties and are considered superior to the widely used TIN coating materials. CrN has been successfully applied to the protective coating of piston rings. Compared with other ceramic membranes, CrN membranes have better heat resistance in practical applications. Among the various nitride ceramics, CrN ceramics are of interest for their high hardness, good thermal stability (even at high temperatures), and proper thermal conductivity.

• Chromium Nitride Powder usually is used as a film coating. It has high hardness and good wear resistance, it is a highly valued wear-resistant coating. Chromium nitride films prepared by hollow cathode ion plating have a Cr+Cr2N two-phase organization, with a grain size of 20-70 nm and hardness of HV22 GPa. After vacuum annealing, it can be increased to HV35.4 GPa. Its wear resistance is better than that of CrC films. Reaction-sputtering chromium nitride film can get two kinds of Cr+Cr2N or single-phase CrN, whose hardness is in HV20-25GPa (HV11GPa for bulk CrN).
• Used as wear-resistant coatings.

Chromium Nitride Powder Storage And Packing

Chromium Nitride (CrN) Powder should be kept sealed and stored in a cool and dry place, and make sure the workroom is well-ventilated or exhausted. The vacuum packing is 1kg/bag, 25kg/drum, or as required.