Plasma electrolytic oxidation (PEO) and filtered cathodic vacuum arc deposition (FCVAD) techniques were employed to fabricate a ZrO₂/Cr composite coating on pure zirconium. The steam oxidation properties of bare and ZrO₂/Cr-coated pure Zr were performed in water vapor environment at 900–1100 °C. Their morphologies, microstructures and phase constituents before and after steam oxidation were analyzed. Meanwhile, their composition depth profiles were measured by glow discharge optical emission spectroscopy (GDOES). It was found that the mass gain of ZrO₂/Cr-coated Zr was about 22–45% of that of bare Zr after 3600 s steam oxidation at 900–1100 °C, and the PEO and FCVAD composite treatments significantly improved the steam oxidation resistance of Zr. After steam oxidation, the phosphorous element in the outer layer of PEO film from phosphate electrolyte diffused into the residual Cr layer, however, most of the phosphorous in the interior of PEO layer was remained although the phosphorus diffusion in the region was accelerated with the increase of steam temperature. The ZrO₂ to Zr₃O phase transformation in PEO intermediate layer occurred in high temperature steam. Furthermore, the PEO zirconia interlayer suppressed hydrogen permeation into the Zr substrate during steam oxidation at 900–1100 °C.

采用等离子电解氧化（PEO）和过滤阴极真空电弧沉积（FCVAD）技术在纯锆上制备ZrO ₂ /Cr复合涂层。裸ZrO ₂ /Cr 涂层纯Zr的蒸汽氧化性能在900-1100 °C 的水蒸气环境中进行。分析了它们在蒸汽氧化前后的形貌、微观结构和相成分。同时，通过辉光放电发射光谱（GDOES）测量它们的成分深度分布。发现 ZrO ₂的质量增加在 900-1100 °C 下进行 3600 s 蒸汽氧化后，/Cr 包覆的 Zr 约为裸 Zr 的 22-45%，PEO 和 FCVAD 复合处理显着提高了 Zr 的抗蒸汽氧化性。蒸汽氧化后，磷酸盐电解液中PEO膜外层的磷元素扩散到残留的Cr层中，而PEO层内部的大部分磷元素仍然存在，尽管该区域的磷扩散随着增加而加速蒸汽温度。PEO中间层的ZrO ₂到Zr ₃ O相变发生在高温蒸汽中。此外，在 900-1100 °C 的蒸汽氧化过程中，PEO 氧化锆夹层抑制了氢渗透到 Zr 基材中。