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Élaboration et caractérisation d’alliages base chrome pour applications à très haute température

Abstract : In the glass making industry, for glass wool insulation production, cobalt or nickel based alloys are used. They operate at high temperature (HT) under specific conditions resulting from glass melts contact and burner proximity. When the T exceeds 1200°C, the properties of these alloys are lost. Increasing T can only be obtained by changing the alloys’ based material. In this frame, choosing chromium alloys is relevant because of the properties its oxide Cr2O3 confers. However, due to its high brittleness at low T and its ductility at HT, Cr has to be alloyed with other elements. In this work, the oxidation behavior of Cr at 1300°C was studied. Then 3 different systems were characterized. Towards the oxidation behavior only one is compatible with a HT environment. Its characterization then its optimization as well as the study of the phenomena met at HT (oxidation, corrosion, ageing, …) were then begun.
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https://hal.univ-lorraine.fr/tel-01746313
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Laurent Royer. Élaboration et caractérisation d’alliages base chrome pour applications à très haute température. Autre. Université Henri Poincaré - Nancy 1, 2009. Français. ⟨NNT : 2009NAN10016⟩. ⟨tel-01746313⟩

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