Abstract Using a zirconium alloy, pre-oxidation was conducted at 1200 °C in a steam environment, and the pre-oxidised specimens were oxidised at 1012, 1100, and 1200 °C. The preformed oxide enhanced the oxidation resistance significantly during the subsequent oxidation at 1012 and 1100 °C. In addition, the preformed oxide enhanced the breakaway oxidation resistance greatly at 1012 °C. The microstructures of the preformed oxide were analysed using TEM and EPMA. The oxidation resistance enhancement may be related to the large columnar grain width of the preformed oxide and Zr-Sn type precipitates formed at the grain boundaries.

中文翻译：

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包层上的高温预成型氧化物提高锆合金包层的高温抗氧化性

摘要 采用锆合金，在1200℃蒸汽环境下进行预氧化，预氧化试样在1012、1100和1200℃下氧化。在随后的 1012 和 1100 °C 氧化过程中，预先形成的氧化物显着提高了抗氧化性。此外，预形成的氧化物在 1012°C 时大大提高了抗断裂氧化能力。使用 TEM 和 EPMA 分析预制氧化物的微观结构。抗氧化性的增强可能与预先形成的氧化物的大柱状晶粒宽度和在晶界处形成的 Zr-Sn 型析出物有关。