Microstructure and properties of composite polyetheretherketone/Bioglass (R) coatings deposited on Ti-6Al-7Nb alloy for medical applications

作者：Moskalewicz Tomasz^*; Seuss Sigrid; Boccaccini Aldo R

来源：Applied Surface Science, 2013, 273: 62-67.

DOI：10.1016/j.apsusc.2013.01.174

• Titanium alloy
• EPD
• Composite coating
• PEEK
• Bioglass
• Microstructure

Composite polyetheretherketone (PEEK)/Bioglass (R) coatings were electrophoretically deposited on two phase alpha + beta Ti-6Al-7Nb titanium alloy substrates. A heat treatment was performed to improve the adhesion of the coatings to the substrate. The microstructure of the coatings and substrate was examined by light microscopy, scanning- and transmission electron microscopy methods as well as by X-ray diffractometry. Coatings deposited from suspensions with PEEK/Bioglass (R) weight ratio of 0.3 showed the best quality. Coatings of 40 mu m thickness, exhibiting uniform porosity, without any cracks or presence of large voids were produced. The microstructure of the coatings was observed to be composed of Bioglass (R) particles fairly homogeneously embedded in a PEEK matrix. STEM-EDX line analysis revealed diffusion of Na from the glass to the PEEK matrix after heat-treatment. The results demonstrate that electrophoretic deposition (EPD) is a very useful method to deposit uniform and reproducible microporous composite PEEK/Bioglass (R) coatings on titanium alloy substrate for biomedical applications.

• 出版日期2013-5-15