Center for Microelectromechanical Systems (CMEMS-UMINHO), University of Minho, Azurém, 4800-058 Guimarães,Portugal; Ceramic and Composite Materials Research Laboratories (CERMAT), Federal University of Santa Catarina (UFSC), Campus Trindade, Florianópolis, SC, Brazil.
Center for Microelectromechanical Systems (CMEMS-UMINHO), University of Minho, Azurém, 4800-058 Guimarães,Portugal.
Mater Sci Eng C Mater Biol Appl. 2017 Oct 1;79:177-184. doi: 10.1016/j.msec.2017.04.157. Epub 2017 May 5.
PEEK is a promising polymer possessing high mechanical strength and biocompatibility and therefore it can be associated to titanium for biomedical applications. This study aimed at producing Ti6Al4V-PEEK joints with enhanced adhesion through laser-structuring Ti6Al4V treatments. Ti6Al4V cylindrical substrates were prepared by two types of surface treatments: alumina blasting and laser structuring. The holes number and size in laser-structured surfaces was varied. PEEK was then hot pressed against the metallic substrate to completely filling the surface cavities. The adhesion of the PEEK/Ti6Al4V joint was assessed by a shear bond strength test. Fracture surfaces and interfaces were investigated by SEM/EDS. Significant differences were found in the shear bond strength between alumina blasted and laser-structured samples. Bond strength improvement (exceeding 300%) was registered for the laser-structured specimens relative to grit-blasted ones. The laser-structuring technique showed to be very promising in the production of specifically designed surfaces for high strength and mechanically stable Ti6Al4V/PEEK joints.
PEEK 是一种很有前途的聚合物，具有高强度和生物相容性，因此可与钛结合用于生物医学应用。本研究旨在通过激光处理 Ti6Al4V 来增强其与 PEEK 的黏附力，从而生产出 Ti6Al4V-PEEK 连接体。Ti6Al4V 圆柱形基底通过两种表面处理方法制备：氧化铝喷砂处理和激光结构化处理。改变激光结构化表面的孔数量和尺寸。然后将 PEEK 热压在金属基底上，以完全填充表面凹坑。通过剪切结合强度测试评估 PEEK/Ti6Al4V 接头的黏附力。通过 SEM/EDS 研究了断裂表面和界面。氧化铝喷砂和激光结构化样品之间的剪切结合强度存在显著差异。相对于喷砂处理的样品，激光结构化处理的样品的结合强度提高了（超过 300%）。激光结构化技术在生产高强度和机械稳定的 Ti6Al4V/PEEK 接头方面显示出非常有前途的应用前景。
