【摘要】 采用微弧氧化技术在TC4合金表面制备陶瓷氧化膜,用扫描电镜(SEM)及X射线衍射仪(XRD)研究微弧氧化时间和添加剂浓度对膜层表面形貌及其指标和物相组成的影响。结果表明,当微弧氧化时间由10min增加至40min时,膜层表面的粗糙度增加,其厚度由8. 6μm增加至14. 3μm,表面孔密度减小,膜层中金红石相的含量增加。随着添加剂浓度由3g/L增加至7. 5g/L,膜层的平整度及其厚度呈现明显的下降趋势,而孔隙率和表面孔密度两个指标则呈现增加趋势,这种影响在膜层的物相变化中并不明显。更多还原

【Abstract】 The ceramic oxide film was prepared on the surface of TC4 alloy using micro arc oxidation.Scanning electron microscopy( SEM) and X ray diffractometer( XRD) were used to study the effects of micro arc oxidation time and additive concentration on the surface morphology,index and phase composition of the coatings. The results showthat,when micro arc oxidation time increases from 10 min to 40 min,surface roughness of the film increases,thickness increases from 8. 6μmto 14. 3μm,the surface pore density decreases,and content of rutile phase in the film increases.As concentration of additives increases from 3 g/L to 7. 5 g/L,evenness and thickness of the coating decreases obviously,while the two indexes of porosity and surface pore density showan increasing trend,which was not obvious in phase change of the film.更多还原