Process for producing dielectric coatings from magnetic cermet material by plasma spraying of composite particles

摘要

A method for forming a magnetic-cermet dielectric coating on substrate surfaces comprises the step of cleaning (12) the surface to be coated. A further step comprises preparing a quantity of finely divided first composite particles having diameters from about 60 to 75 micrometers, each first composite particle comprising a first electrically insulating ceramic matrix having a plurality of first magnetic metal particles, having average diameters of from about 1 to 5 mircrometers, spaced throughout the matrix, the first metal particles making up from about 50 to 75 volume % of said first composite particles. A further step comprises plasma spraying (16) said first composite particles onto the surface to be coated at temperatures such that the first composite particles are melted on their surfaces only, whereby a magnetic-ceramic dielectric layer is formed. IMAGE