nickelboron

Nickel boron, or nickel boride, refers to a family of intermetallic compounds formed between nickel and boron. The phase space includes several stoichiometries, with Ni2B and Ni3B among the best characterized. These compounds are typically hard and have high thermal stability, with metallic electrical conductivity. They are often brittle, a common trait of transition-metal borides, which limits some structural applications.

Nickel borides can be prepared by high-temperature solid-state reactions between nickel and boron, by boriding nickel or nickel alloys, or by various deposition methods. Thin films and coatings of nickel boride can be produced by chemical vapor deposition or electroless nickel boride processes, yielding either amorphous or crystalline layers depending on processing.

Applications include protective hard coatings for tools and mechanical components, where high hardness and wear resistance are desired. Some nickel boride phases also act as catalysts for hydrocarbon processing and hydrogenation reactions, particularly at elevated temperatures. In addition, nickel boride coatings may serve as diffusion barriers in microelectronics and as catalytic layers in energy conversion systems.

Safety and handling: nickel boride materials are generally handled under standard lab or industrial precautions for powders or coatings. They can be irritants to skin and eyes if dust is generated; inhalation of powders should be avoided. Appropriate PPE, ventilation, and compliant waste handling are recommended.

See also: nickel, boron, intermetallic compounds, Ni2B, Ni3B, Ni-B coatings.