CAJ | 학술논문

通过微弧氧化技术在MB8镁合金表面形成微细表面结构,再利用自组装方法在微弧氧化层表面制备1H,1H,2H,2H-全氟葵烷基三氯硅烷（FDTS）自组装分子膜。采用扫描电镜、表面粗糙度仪、X射线衍射仪、表面硬度仪、接触角测量仪和UMT-2型摩擦磨损试验机评价膜层形貌结构、力学特性、润湿性及其微摩擦学特性。结果显示,镁合金表面经微弧氧化处理和自组装分子膜修饰后,表面润湿性经历了由亲水到超亲水再到超疏水的转变过程。超疏水表面的获得是由微弧氧化处理得到的表面粗糙结构和低表面能物质自组装分子膜共同作用的结果。对试样进行摩擦磨损测试的结果显示,致密层和疏松层以及经自组装分子膜修饰后的膜层均具有比镁合金基底更好的抗磨性能;基于自组装技术制备的疏水、超疏水表面形成的边界润滑膜在一定载荷条件下均能有效地减少基底的摩擦系数,边界润滑膜失效后,基底表面特性占主导地位。
통과미호양화기술재MB8미합금표면형성미세표면결구,재이용자조장방법재미호양화층표면제비1H,1H,2H,2H-전불규완기삼록규완（FDTS）자조장분자막。채용소묘전경、표면조조도의、X사선연사의、표면경도의、접촉각측량의화UMT-2형마찰마손시험궤평개막층형모결구、역학특성、윤습성급기미마찰학특성。결과현시,미합금표면경미호양화처리화자조장분자막수식후,표면윤습성경력료유친수도초친수재도초소수적전변과정。초소수표면적획득시유미호양화처리득도적표면조조결구화저표면능물질자조장분자막공동작용적결과。대시양진행마찰마손측시적결과현시,치밀층화소송층이급경자조장분자막수식후적막층균구유비미합금기저경호적항마성능;기우자조장기술제비적소수、초소수표면형성적변계윤활막재일정재하조건하균능유효지감소기저적마찰계수,변계윤활막실효후,기저표면특성점주도지위。
Rough structure of MB8 magnesium alloy substrate were acquired by micro-arc oxidation and perflu- orodecyltrichlorosilane self-assembled monolayers deposited on the rough surface. Scanning electron micro- scope, surface profiler, X-ray diffractometer, surface hardness meter and contact angle measurement were used to analyse the surface properties and wettability of specimen. The micro-tribological behavior of specimens was evaluated on CERT UMT-2 tribometer. The results indicate that the wettability of substrate convert from hy- drophilicity to superhydrophilicity and superhydrophobicity after micro-arc oxidation and self-assembled mono- layers preparation. Rough structure of substrate by micro-arc oxidation and low surface energy material FDTS self-assembled monolayers are the main factors to prepare superhydrophobic surface. The results of tribological behavior of Si3 N4 ball and substrate surfaces indicate that compact layer, loose layer and their modified surfaces by SAMs all show a better anti-wear ability than bare magnesium alloy under the same testing condition. The hydrophobic and superhydrophobic boundary lubricating film formed by self-assembled monolayers can decrease the friction coefficient of base layer under certain load conditions. The tribological behavior depends on surface characteristics of base layer, if the boundary lubricating film is failed.