Boron Nitride Coating On Graphite

They are non wetting to molten metal and act like a high temperature version of teflon providing these qualities.

Boron nitride coating on graphite.

Hbn is able to withstand temperatures up to 3 300 degrees f under normal atmospheric conditions before. Morgan advanced materials technical ceramics business pyrolytic boron nitride pbn coated graphite components are the best choice to extend heater life or temperature capability in mbe and cigs pv applications. Graphite and hexagonal boron nitride h bn are two prominent members of the family of layered materials possessing a hexagonal lattice structure while graphite has nonpolar homonuclear c c intralayer bonds h bn presents highly polar b n bonds resulting in different optimal stacking modes of the two materials in the bulk form furthermore the static polarizabilities of the constituent. The key difference between boron nitride and graphite is that boron nitride is composed of boron and nitrogen atoms whereas graphite is composed of carbon atoms.

Boron nitride is a ceramic compound which is chemically inert and stable between medium and high temperatures resistant up to 1000 c in air 1400 c in vacuum and 1800 c in inert gas atmosphere. They have different atomic compositions which results in different chemical and physical properties. 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. Boron nitride powder coatings a highly versatile synthetic material with similar thermal conductivity and lubricating properties as graphite hexagonal boron nitride hbn is the crystalline powder often referred to as white graphite.

Boron nitride and graphite are important crystalline materials. Our bn coating is an excellent release agent and well suited to protect the surface of graphite parts from oxidation and to create a non wetting. Molten aluminum rolls off it like water on a duck s back. Hexagonal boron nitride hbn is a ceramic that has all of the advantages of graphite as a lubricant with none of the disadvantages.

Ceraglide boron nitride bn coatings are composed of a high purity bn powder base paired with a high temperature bond phase. Supplied in a liquid form suitable for brushing they can be diluted with water to spraying and dipping consistencies and applied to a variety of porous and non porous materials including ceramics metals graphite. Boron nitride aqueous coatings for high temperature protection lubrication and release. Belted bullets and crush rib sabots with white boron nitride coating before right and after left coating.

Our main coatings are made with boron nitride.