making boron nitride a carbon material is produced with visually the same dimensions and no weight changes from its initial condition the surface is light grayish white in appearance machined dimensions are retained yet the initial carbonaceous material transforms into a distinctly different carbon material with superior oxidation resistance and an electrically non conductive surface the final material is uniquely produced at one atmosphere pressure with flowing nitrogen according to the present invention a new carbon material is provided that has many advantages over the prior art the new carbon material exhibits almost no reaction with air to temperatures of 900 u00b0 c for many days the material is distinctly not a coating but an integral surface treatment that is married to the substrate whereby the dimensions are essentially unchanged from their initial dimensions any carbonaceous material can be heat treated in a standard boron nitride powder production process mixture in the presence of nitrogen gas at one atmosphere pressure the converted surface has an affected depth of about 200 micrometers whereas the first 100 micrometers seem to have mostly changed visually the surface is light grayish black the procedure is similar to metal heat treating any shaped part or component of a carbonaceous material is placed in a powder mixture.