【作者】 张世锋；

【导师】 严立； 高玉周；

【作者基本信息】 大连海事大学 ， 载运工具运用工程， 2004， 硕士

【摘要】 金属及其合金表面进行陶瓷化可以改善金属基体的硬度低、耐磨耐蚀性差、可加工性差等不足，并且能保证原金属材料的使用性能。本文正是基于此，研究等离子体微弧氧化这一在有色金属表面原位生长陶瓷膜的新技术。它突破了传统的阳极氧化在法拉第区内成膜的限制，可在微弧区中氧化成膜，而且它具有工艺简单、效率高、无污染、处理工件能力强等特点。 本文以铝和钛作为材料，通过不同的电解质溶液、不同的氧化时间等试验，分析影响等离子体微弧氧化的因素。比较不同条件下生成微弧氧化膜层的性能，为形成一定规模的生产做有益的探索。 主要研究结果如下： 铝及其合金的微弧氧化工艺试验研究表明，与纯碱式或酸式盐电解质溶液对比在碱式盐电解质溶液中，生成的氧化膜表面光滑、细腻，与基体结合紧密，硬度比较高，结构和性能也比较好；氧化膜的主要相为α-Al₂O₃和γ-Al₂O₃；耐腐耐蚀性试验表明氧化膜的耐磨性和耐蚀性都很好。 钛及其合金的微弧氧化工艺试验研究表明，在酸性溶液中，生成的氧化膜相结构主要为锐钛矿型TiO₂，而且随着pH值的减小，锐钛矿的含量逐渐增加。在碱性溶液中，生成的氧化膜相结构主要为金红石型TiO₂，而且随着pH值的增加，金红石的含量逐渐增加。不同添加剂可使膜层中的组分发生变化，改善氧化膜层的性能。更多还原

【Abstract】 The ceramic coatings on the surface of some metals can improve the shortcomings of low microhardness, poorly corrosion and wear resistance, in the same time maintain the property of the metals. This paper introduces the new surface treatment technology, that is micro plasma oxidation, which can in-situ form the ceramic coatings on the surface of some non-ferrous metals. It breaks out the traditional anode-oxidation technique of forming oxide coating according to Faraday’s law, and forms oxide coating in micro plasma areas. It has the characters of simply technique, high efficiency, no pollution, etc.The experimental materials are aluminum and titanium. The influences of the different electrolytic solutions and oxidation time on the ceramic coatings are studied. The properties of the ceramic coatings in different conditions are researched to use this technique in industrial application in the future.The main results show as follows:The experiments of the micro plasma oxidation of aluminum alloy indicate that the ceramic coatings possess smooth surface, high microhardness, better phase structure and property in alkalescent electrolytic solution; The ceramic coating is mainly composed of a-Al2O3 and r-Al2O3. The results of wear-resistance and salt spray test indicate that the wear-resistance and the corrosion-resistance are improved.The experiments of the micro plasma oxidation of titanium alloy indicate that the phase structure of coating is mainly composed of anatase type TiO2 in acidic electrolytic solution. As aqueous pH decreases, the proportion of anatase type TiO2 continually increased. The phase structure of coating is mainly composed of rutile type TiO2 in alkalescent electrolytic solution. As aqueous pH increases, the proportion of rutile type TiO2 continually increase. Different additive can change the structure of the coating and the property of the coating.更多还原