CAJ | 학술논문

研究2A97铝锂合金在硅酸盐电解液中等离子电解氧化膜的生长规律，分析直流条件下电流密度、氧化时间等电参数对氧化陶瓷膜的表面和截面形貌、成分和相组成以及耐蚀性的影响。结果表明：等离子电解氧化处理提高了铝锂合金的耐腐蚀性能，但处理时间过长，膜层微观结构中缺陷增多，对膜层的耐蚀性带来不利影响，提高电流密度对膜层的耐蚀性也没有明显的影响。铝锂合金的等离子电解氧化膜微观结构中存在两类不同放电类型导致的特征结构，其中来源于基体/膜层界面的火花放电生成的结构含有较多的Al，而氧化膜表层或浅层的火花放电主要在膜层表面生成含有较多电解液成分的菜花状结构。膜层的相结构主要为γ-Al2O3。
연구2A97려리합금재규산염전해액중등리자전해양화막적생장규률，분석직류조건하전류밀도、양화시간등전삼수대양화도자막적표면화절면형모、성분화상조성이급내식성적영향。결과표명：등리자전해양화처리제고료려리합금적내부식성능，단처리시간과장，막층미관결구중결함증다，대막층적내식성대래불리영향，제고전류밀도대막층적내식성야몰유명현적영향。려리합금적등리자전해양화막미관결구중존재량류불동방전류형도치적특정결구，기중래원우기체/막층계면적화화방전생성적결구함유교다적Al，이양화막표층혹천층적화화방전주요재막층표면생성함유교다전해액성분적채화상결구。막층적상결구주요위γ-Al2O3。
The plasma electrolytic oxidation(PEO) processes of 2A97 aluminium-lithium alloy in silicate electrolyte were studied. The PEO processes were carried out with DC regime, and the factors such as current density and treatment time on the morphologies of surface and the cross section of the coatings and the corrosion resistance of coatings were analyzed. The results show that the PEO processing enhances the corrosion resistance of the aluminium-lithium alloy, however, the corrosion resistance will be deteriorated by long processing time, due to more defects developed in the coatings, and the corrosion resistance of the coatings is also little affected by increasing the current density. There are two types of microstructures existing in the PEO coatings of aluminium-lithium alloy, which are resulted from the different types of discharging. The microstructure resulted from the discharge originated at substrate/coating interface contains more content of Al, while the discharge happening on the surface or shallow depth of PEO coating causes the formation of the cauliflower-like structure with electrolyte species on the surface of the PEO coatings. The main phase composion of the coatings isγ-Al 2 O 3 .