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120 μm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 800s后未失效,其耐磨性相对于基体大大提高.
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