Study on the Preparation of High-Temperature Resistant and Electrically Insulating h-BN Coating in Ethanol Solution by Electrophoretic Deposition

A hexagonal boron nitride (h-BN) coating of micron thickness is deposited directly on 316L stainless steel (SS316L) cathode through efficient, adjustable electrophoretic deposition (EPD) in a suspension system containing surfactant and ethanol. It based the mixing h-BN with polyethyleneimine (PEI) resulting positively charged ceramic powder making cathodic possible. The coatings SS316L could be controlled by varying time voltage deposition. kinetics mechanism have been discussed. After soaking Al(H2PO4)3 solution high-temperature annealing, exhibited good adhesive strength. Furthermore, novel method has used for evaluation strength to explore appropriate experimental conditions. X-ray diffraction spectroscopy (XRD), Fourier transform infrared (FTIR), scanning electron microscopy (SEM) energy dispersive (EDS) were employed characterize coatings. are applied DC breakdown performance test exhibit remarkable