Identification of the spinel (Cr,Al)3S4 in the internal sulfidation zone of Al-diffusion coatings |
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Authors: | E. Erdös A. Rahmel |
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Affiliation: | (1) Department R+D, Gebr. Sulzer AG, Postfach 15, CH-8401 Winterthur, Switzerland;(2) Dechema-Institut, Postfach 97 01 46, D-6000 Frankfurt/Main 97, FRG |
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Abstract: | The thiospinel (Cr, Al)3S4 has been identified in the internal sulfidation zone of Al-diffusion coatings by electron diffraction in a transmission electron microscope. The Al/Cr ratio of this phase can vary over a rather broad range, obviously dependent on the Al/Cr ratio in the surrounding metallic matrix. The spinel can dissolve significant amounts of Ni and Mo, some Co but only traces of Ti. Increasing Al-content extents its stability to higher temperatures. |
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Keywords: | thiospinel (Cr, Al)3S4 Al-diffusion coatings |
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