Ceramics Cubic Boron Nitride

Boron nitride is a thermally and chemically resistant refractory compound of boron and nitrogen with the chemical formula bn it exists in various crystalline forms that are isoelectronic to a similarly structured carbon lattice.

Ceramics cubic boron nitride.

Cubic boron nitride cbn next only to diamond in hardness knoop hardness 4700 kgf mm 2 is an unusual material in that it does not exist in nature. Boron nitride has out standing thermal characteristics. Boron nitride is an advanced synthetic ceramic material available in powder solid liquid and aerosol spray forms. Its unique properties from high heat capacity and outstanding thermal conductivity to easy machinability lubricity low dielectric constant and superior dielectric strength make boron nitride a truly outstanding material.

In solid form it can be machined easily with ordinary metalworking tools. The hexagonal form corresponding to graphite is the most stable and soft among bn polymorphs and is therefore used as a lubricant and an additive to cosmetic products. The cubic boron nitride cbn variety analogous to diamond has high hardness which is inferior only to diamond. High thermal conductivity and excellent thermal shock resistance.

Its unique properties from high heat capacity and outstanding thermal conductivity to easy machinability and superior dielectric strength make boron nitride a truly outstanding material. Synthesis of cbn involves the structural transformation of boron nitride from hexagonal to cubic form similar to diamond at high temperature high pressure hp ht in the presence of a.