Graphite Layers

Graphite parts coated by pyrolytic graphite PG layer

Protective PG layers of high purity are deposited on graphite and other substrates, the typical thickness of the layer is in the range of 0,01 – 0,03 mm. The previously porous surface of the graphite object becomes smooth and sealed, resembling a metal surface. Components coated with PG layers are chemically more inert than graphite itself and are also stable up to VERY high temperatures (3000°C). PG coated components are also impermeable, no dusting, and partially more resistant to scratching and etching. They are most commonly used as heaters, screws, and covers—mainly in special atmosphere processes exposed to high temperatures and pressures.