Abstract
Abstract Thermochemical calculations for the deposition of aluminium and chromium using the metal–subhalide chemistry have been performed by the HSC chemistry software. Before depositing, the flow regimes that lead to a fluidized bed without particle elution have been measured at room and deposition temperatures. Aluminium diffusion coatings have been obtained on austenitic AISI 304 stainless steel and IN-100 Ni-base alloy; the deposition being much faster on the steel substrates. However, the chromium diffusion coatings are only achieved on the IN-100 Ni-base superalloy since in the steel, volatilization of Fe occurs at the first stages of deposition.
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