钴铬合金表面铁离子掺杂二氧化钛膜的制备

目的在钴铬合金表面制备Fe3+掺杂二氧化钛薄膜。方法采用溶胶-凝胶法在钴铬合金表面制备Fe3+掺杂二氧化钛膜,利用扫描电镜、原子力显微镜、X射线衍射仪、傅立叶红外光谱仪、X射线能谱仪分别表征薄膜的表面和横断面形貌、晶相结构及元素成分,并通过划痕法和磨损实验测试膜基结合强度及薄膜的耐磨性。结果钴铬合金试样表面形成一层厚约267~310 nm、平整致密的金黄色透明薄膜,薄膜成分为锐钛矿型二氧化钛,其主要元素成分有O、Ti、Fe。膜基结合力平均值为68.37 N,同等磨损实验条件下,镀膜试样的失重量约为未镀膜者的2/5。结论溶胶-凝胶法在钴铬合金表面制备Fe3+掺杂二氧化钛薄膜光滑平整,具有良好的膜基结合力与临床应用价值。

Preparation of Fe3+ -doped TiO2 film Co-Cr alloy

Objective To prepare Fe3+-doped TiO2 film on Co-Cr alloy.Methods Fe3+-doped TiO2 thin films were prepared by a sol-gel technique with dip coating method on Co-Cr alloy using Ti(OC4H9)4 ethanol solution as a precursor.The structure and morphology of samples were characterized by scanning electron microscopy(SEM),atomic force microscopy(AFM),X-ray diffraction(XRD),Fourier Transform infrared spectrometer(FT-IR),and Energy Dispersive Spectroscopy(EDS).Bonding force and the wear resistance were measured by scratch method and wear test respectively.Results About 267nm～310nm thick smooth and compact Fe3+doped anatase TiO2 films were formed on the surface of Co-Cr alloy and were composed of O,Ti,Fe.The average value of bonding force was 68.37 N.Under the same experimental condition,the weight loss of coated samples was only 42 percent of that of uncoated ones.Conclusion Smooth and compact Fe3+-doped TiO2 films with satisfactory interface adhesive strength and clinical value can be prepared by sol-gel technique.