采用微弧氧化技术,通过向电解液中分别添加不同的陶瓷颗粒(SiC、SiO2),在 TC4钛合金表面制备复合陶瓷膜.采用扫描电镜(SEM)、X 射线衍射仪(XRD),MMA-1万能摩擦磨损实验机研究了不同的陶瓷颗粒对膜层微观组织结构、元素分布特征、相组成和耐磨性能的影响.结果表明,在电解液中添加陶瓷颗粒都能使膜层表面变得致密平整且膜层的厚度增加.陶瓷颗粒能够进入氧化层中,但并不发生相变反应.SiC和SiO2颗粒能显著提高膜层耐磨性能.
The composite ceramic coatings were fabricated on TC4 by micro-arc oxidation adding different ce-ramic particles(SiC,SiO2 )separately into the same electrolyte.The effects of different ceramic particles addi-tion on microstructure,element distribution,phase composition and wear resistance of ceramic coating were an-alyzed by SEM,XRD and a MMA-1 model friction and wear tester respectively.The results show the surfaces with ceramic particles are much denser and smoother,and the thickness is also increased.The ceramic particles are successfully embedded in the coatings,while do not occur the phase transition reaction.The SiC particles consist ofα-Ti,TiO2 andα-SiC,β-SiC.The wear resistance of the coatings can be improved by adding SiC and SiO2 particles.
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