jackboot:
I think your problem may be related to excessive heating of the part during deposition. There may be a CTE mismatch between your coating and substrate; your coating probably has lower CTE than the substrate. When the part cools, the substrate will shrink more than the coating...
My question relates to the boronizing or boriding process. 1- Does anyone have names or list of boronizing agent (powder) suppliers? 2- Can a vacuum furnace with retorts be used in the boronizing process?