【摘要】 锆合金广泛用于核工业,也是潜在的生物医用材料,然而其表面性能需要改善。为此,开发了硅酸盐-六偏磷酸钠电解液,采用双脉冲微弧氧化技术在Zr-2锆合金上生成较厚的膜层,并运用扫描电镜（SEM）、能谱仪和X射线衍射仪（XRD）分析了膜层的形貌和组成,并考察了膜层的耐磨性。结果表明:微弧氧化60 min可以生成厚120μm左右的膜层,相组成主要是单斜氧化锆（m-ZrO₂）,含少量的四方氧化锆（t-ZrO₂）;微弧氧化20 min的膜层在20 N下很快被磨穿;而微弧氧化60 min的膜层在20 N下干摩擦1 800 s后未失效,其耐磨性相对于基体大大提高。更多还原

【Abstract】 Thick oxidation coatings were prepared on Zr-2 alloy by pulsedbipolar micro-arc oxidation in silicate-hexametaphosphate electro-lyte. The morphology and phase composition of as-preparedcoatings were analyzed, and their wear resistance was also evalua-ted. Results showed that 60 min of micro-arc oxidation could afforda micro-arc oxidation coating with a thickness of about 120 jxm, andthe coating consisted of monocKnic Zr02 and a small amount oftetrahedral Zr02. The micro-arc oxidation coating obtained after 20 min of micro-arc oxidation was worn out quickly under an appliedload of 20 N. Nevertheless, the micro-arc oxidation coatingobtained after 60 min of micro-arc oxidation didn,t fail after 1 800 s of dry sliding under the same applied load, showing much betterwear resistance than the Zr alloy substrate.更多还原