Cr/Cr_xN coatings were deposited on Zr-4 substrates by multi-arc ion plating for accident-tolerant fuel coatings. The effect of the Ar/N₂ flow ratio on the microstructure, mechanical properties, and high-temperature steam oxidation behavior of the coatings was investigated systematically. All coatings significantly increased the oxidation resistance of Zr-4 by forming a Cr₂O₃ oxide layer, and the performance degradation was caused by the decomposition of Cr_xN and the consumption of the Cr layer in the high-N coating and the pores in the oxide layer of the low-N coating. In addition, the mechanism of high-temperature steam oxidation was discussed in detail.

中文翻译：

---

Ar/N2 流量比对用于事故容错燃料涂层的 Cr/CrxN 涂层的微观结构、机械性能和高温蒸汽氧化行为的影响

Cr/Cr _x N 涂层通过多弧离子镀沉积在 Zr-4 基材上，用于事故容错燃料涂层。系统地研究了Ar/N ₂流量比对涂层微观结构、力学性能和高温蒸汽氧化行为的影响。所有涂层均通过形成Cr ₂ O ₃氧化层显着提高Zr-4的抗氧化性，性能下降是由于Cr _x N的分解和高N涂层中Cr层的消耗和气孔造成的在低氮涂层的氧化层中。此外，还详细讨论了高温蒸汽氧化的机理。