Abstract—

Rare earth cerium oxide synthesized from cerium (III) chloride and cerium (III) nitrate salts in electrolytes were used to develop nanostructured composite coatings by plasma electrolytic oxidation (PEO) technique on Ti6Al4V. The micro-hardness (542 HV) and corrosion resistance of fabricated coat in the electrolyte containing cerium (III) nitrate was notable. Formation of the ceria/titania nanostructured composite originated from the nitrate salt during PEO process acted as a barrier to the porosity growth and exhibited a higher impedance resistance (8.6 × 10⁵ Ω Cm²) at the lower frequency and higher corrosion resistance (2.26 × 10^–3 mm y^–1) in 0.1 M HCl solution at the room temperature than the fabricated coat in PEO-electrolyte containing the cerium (III) chloride salt. Structural characterization techniques such as (X-ray diffraction) XRD, (scanning electron microscope) SEM and (energy disperse spectroscopy) EDS were used to investigate the microstructure and morphology of the coatings. Fourier transform infrared spectroscopy (FT-IR) was utilized to recognize and to confirm the development of bonds with wavelength of 457 and 530 cm^–1 corresponded to the stretching vibration (Ce–O) of the attracted cerium oxide nanoparticles in the coatings. The result demonstrated that CeO₂ nanoparticles were created and drawn into the discharge channels of sample CS3 during the PEO has led to the enhancing of the composite coating thickness (31 µm) and corrosion resistance, too.

中文翻译：

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Cl-和$$ {\ text {NO}} _ {3} ^ {-} $$离子对Ti6Al4V上等离子电解氧化（PEO）获得的TiO 2 -CeO 2纳米结构复合涂层的组织和性能的影响

摘要-

利用氯化铈（III）和硝酸铈（III）盐在电解质中合成的稀土氧化铈，通过等离子电解氧化（PEO）技术在Ti6Al4V上开发出纳米结构复合涂层。在含硝酸铈（III）的电解液中制备的涂层的显微硬度（542 HV）和耐蚀性显着。的形成氧化铈/二氧化钛纳米结构的复合材料源自期间PEO过程硝酸盐充当屏障的孔隙率生长并表现出较高的阻抗电阻（8.6×10 ⁵ Ω厘米²）在较低的频率和较高的耐腐蚀性（2.26× 10 ^–3毫米y ^–1）在室温下在0.1 M HCl溶液中比在含有氯化铈（III）盐的PEO电解质中制成的涂层中形成的。使用结构表征技术，例如（X射线衍射）XRD，（扫描电子显微镜）SEM和（能量分散谱）EDS研究涂层的微观结构和形态。傅立叶变换红外光谱（FT-IR）用于识别并确认波长为457和530 cm ^–1的键的发展，其与涂层中被吸引的氧化铈纳米粒子的拉伸振动（Ce–O）相对应。结果表明CeO ₂ 在PEO期间，产生了纳米颗粒并将其吸入样品CS3的排放通道中，从而也提高了复合涂层的厚度（31 µm）和耐腐蚀性。