Die Oxydation von intermetallischen Zirkoniumlegierungen in Sauerstoff und Wasserdampf bei 400 °C

The oxidation of intermetallic zirconium alloys in oxygen and steam at 400°C The author has studied the oxidation behaviour of some intermetallic zirconium alloys in oxygen and steam. Depending on their behaviour the alloys can be divided into three categories:

• 1 Selective oxidation of alloying elements in the case of the alloys ZrAl₃ et ZrSi
• 2 Selective oxidation of Zr produced by rearrangement and enrichment of alloying elements in the case of Zr₄Sn, ZrCU₃ ZrNi, ZrV₂ and ZrMo_2/
• 3 Oxidation control by mixed oxides in the case of ZrNb and ZrTa

The mechanism of the corrosion of ZrAl₃ and ZrSi₂ in steam is interpreted in terms of the selective attack of Al and Si respectively.