Preparation of boron nitride-based coatings through thermal diffusion process

Preparation of boron nitride (BN)-based coatings for friction and corrosion conditions has been proposed and made through the thermal diffusion process following chemical vapour deposition principles. It includes the formation of gaseous B- and N-based species due to high-temperature reactions (decomposition) in the B- and N-rich powders with consequent deposition of B and N onto the heated substrate and their diffusion into the substrate with formation and consolidation of a thin BN layer. The proposed process can be used for complex-shape components employing simple production equipment.