CAJ | 학술논문

通过向Na2SiO3?NaAlO2复合电解液体系中添加纳米SiC，经过微弧氧化处理后在AZ91D镁合金表面制备含纳米SiC的复合陶瓷层。利用SEM、膜层测厚仪、XRD、EDS和维氏硬度计分别研究膜层的微观形貌、厚度、相结构、元素组成及硬度。采用摩擦磨损试验机对镁合金基体和膜层的干滑动磨损行为进行研究，运用动电位极化曲线试验和交流阻抗法测量镁合金基体和膜层在3.5% NaCl溶液中的耐蚀性能。结果表明：向电解液中添加纳米SiC后，微弧氧化的起弧电压和终止电压均下降。经纳米SiC复合处理后，微弧氧化膜层的孔径减小，致密性提高；与未添加纳米SiC的膜层相比，其厚度和硬度都得到提升，耐磨性与耐蚀性均增强。
통과향Na2SiO3?NaAlO2복합전해액체계중첨가납미SiC，경과미호양화처리후재AZ91D미합금표면제비함납미SiC적복합도자층。이용SEM、막층측후의、XRD、EDS화유씨경도계분별연구막층적미관형모、후도、상결구、원소조성급경도。채용마찰마손시험궤대미합금기체화막층적간활동마손행위진행연구，운용동전위겁화곡선시험화교류조항법측량미합금기체화막층재3.5% NaCl용액중적내식성능。결과표명：향전해액중첨가납미SiC후，미호양화적기호전압화종지전압균하강。경납미SiC복합처리후，미호양화막층적공경감소，치밀성제고；여미첨가납미SiC적막층상비，기후도화경도도득도제승，내마성여내식성균증강。
Ceramic coating incorporated with nano-SiC was obtained on AZ91D magnesium alloy during MAO by adding nano-SiC into the silicate?aluminate-based composite electrolyte. The microstructure, thickness, phase analysis, element composition and hardness of the coatings were respectively investigated by scanning electron microscopy(SEM), film thickness meter, X-ray diffraction (XRD), energy disperse spectroscopy(EDS) and Vickers hardness tester. The wear resistance of Mg alloy and coatings were evaluated by friction and wear apparatus, while the corrosion resistance of Mg alloy and coatings were evaluated by potentiodynamic polarization test and electrochemical impedance spectroscopy (EIS). The results show that after adding nano-SiC into the electrolyte, both the striking voltage and final voltage decrease, the size and number of the micropore on the surface of the coating decrease, the thickness and hardness of the coating increase, both the wear resistance and corrosion resistance of the coating raise.