不同电解液体系中SiC_(p)/Al基复合材料微弧氧化膜层的组织与性能  

Microstructure and properties of micro-arc oxidation films on SiC_(p)/Al matrix composites in different electrolyte systems

作　　者：杜春燕[1] 黄树涛[2] 杨海成[3] 胡宇航 于晓琳[2] DU Chunyan;HUANG Shutao;YANG Haicheng;HU Yuhang;YU Xiaolin(School of Material Science and Engineering,Shenyang Ligong University,Shenyang 110159,China;School of Mechanical Engineering,Shenyang Ligong University,Shenyang 110159,China;Xi’an Institute of Applied Optics,Xi’an 710065,China)

机构地区：[1]沈阳理工大学材料科学与工程学院,沈阳110159 [2]沈阳理工大学机械工程学院,沈阳110159 [3]西安应用光学研究所,西安710065

出　　处：《材料工程》2023年第6期139-149,共11页Journal of Materials Engineering

摘　　要：在(NaPO_(3))6,Na_(2)SiO_(3)-NaOH和NaAlO_(2)-NaOH三种电解液中,采用微弧氧化技术在SiC_(p)/Al基复合材料表面制备微弧氧化膜层。使用扫描电子显微镜(SEM)、X射线光电子能谱(XPS)、X射线衍射(XRD)对膜层组织结构及相组成进行表征,并通过摩擦磨损实验及电化学工作站分析基体及膜层的耐磨性和耐蚀性。结果表明:三种电解液中均能制备出均匀的微弧氧化膜层,NaAlO_(2)-NaOH中制备的膜层粗糙度和厚度最大。三种电解液中制备的膜层物相有差异。微弧氧化提高SiC_(p)/Al基复合材料的显微硬度,其中NaAlO_(2)-NaOH中制备的膜层硬度达到1125HV。微弧氧化可降低SiC_(p)/Al基复合材料的摩擦因数,综合摩擦因数及磨损情况,NaAlO_(2)-NaOH中制备的微弧氧化膜层的耐磨性较好。三种电解液中制备的微弧氧化膜层均能改善SiC_(p)/Al基复合材料的耐蚀性,其中Na_(2)SiO_(3)-NaOH中制备的膜层耐蚀性优异,腐蚀电位和腐蚀电流密度分别为-0.6122 V和2.704×10^(-7)A·cm^(-2)。Micro-arc oxidation films were prepared on the surface of SiC_(p)/Al matrix composites in(NaPO_(3))_(6),Na_(2)SiO_(3)-NaOH and NaAlO_(2)-NaOH electrolyte.The microstructure and phase composition of the films were characterized by scanning electron microscopy(SEM),X-ray photoelectron spectroscopy(XPS)and X-ray diffraction(XRD).The wear resistance and corrosion resistance of the substrate and films were analyzed by friction and wear test and electrochemical workstation.The results show that the uniform micro-arc oxidation films can be prepared in all the three electrolytes.The roughness and thickness of the film prepared in NaAlO_(2)-NaOH is the largest.The phases of the films prepared in the three electrolytes are different.The microhardness of SiC_(p)/Al matrix composites is improved by micro-arc oxidation,and the hardness of the film prepared in NaAlO_(2)-NaOH reaches 1125HV.The friction coefficient of SiC_(p)/Al matrix composites is reduced by micro-arc oxidation.According to the friction coefficient and wear condition,the film prepared in NaAlO_(2)-NaOH has excellent wear resistance.The micro-arc oxidation film prepared in three kinds of electrolyte can improve the corrosion resistance of SiC_(p)/Al matrix composites.The corrosion resistance of the film prepared in Na_(2)SiO_(3)-NaOH is excellent,the corrosion potential and current density of the film prepared in Na_(2)SiO_(3)-NaOH are-0.6122 V and 2.704×10^(-7)A·cm^(-2),respectively.

关 键 词：SiC_(p)/Al基复合材料 微弧氧化 组织结构 耐磨性 耐蚀性 

分 类 号：TG174.4[金属学及工艺—金属表面处理]