Fahad Nesreen Dakhel, Radhi Nabaa Sattar, Al-Khafaji Zainab S, Diwan Abass Ali
Faculty of Engineering, University of Kufa, Iraq.
College of Materials Engineering, University of Babylon, Iraq.
Heliyon. 2023 Mar 3;9(3):e14103. doi: 10.1016/j.heliyon.2023.e14103. eCollection 2023 Mar.
The performance of biomaterials in biological systems is of critical significance for advancing biomedical implants. Duplex Stainless Steel alloys are the major biomaterials due to their significant characteristics. Many functional coatings are deposited on DSS alloy surfaces utilizing numerous surface coating techniques to improve their bioactivity and protect them from corrosion degradations. Coatings of titanium dioxide (TiO), Hydroxyapatite (HA), and zinc oxide (ZnO) have received considerable attention in the field of surface bioactive modification of DSS alloy implants. The coating techniques play a key role in increasing the required biological characteristics of DSS alloys, such as biocompatibility, mechanical properties, and corrosion resistance. In this regard, HA-ZnO, HA-TiO and TiO-ZnO from each coating group are divided into single, double, and triple layers. These coatings were prepared by cold spray and deposited on the surface of the DSS alloy, followed by a heat treatment at 250 °C. The surface morphology of coated surfaces was analyzed utilizing field emission scanning electron microscopy (FESEM), atomic force microscopic (AFM), microhardness test, corrosion test in Ringer solution, and antibacterial test. The coatings showed nano-scale surface morphology with advanced crystallization and homogeneous structures; in the corrosion characteristics utilizing potentiodynamic polarization, triple layers of HA-ZnO coatings displayed advanced nanostructures with higher hardness values (514.75HV). The antibacterial test showed the triple layers of HA-TiO and two layers of TiO-ZnO sensitivity to positive bacteria.
生物材料在生物系统中的性能对于推进生物医学植入物至关重要。双相不锈钢合金因其显著特性而成为主要的生物材料。利用众多表面涂层技术在双相不锈钢合金表面沉积了许多功能涂层，以提高其生物活性并保护它们免受腐蚀降解。二氧化钛（TiO）、羟基磷灰石（HA）和氧化锌（ZnO）涂层在双相不锈钢合金植入物的表面生物活性改性领域受到了相当大的关注。涂层技术在提高双相不锈钢合金所需的生物学特性方面起着关键作用，如生物相容性、机械性能和耐腐蚀性。在这方面，每个涂层组中的HA-ZnO、HA-TiO和TiO-ZnO分为单层、双层和三层。这些涂层通过冷喷涂制备并沉积在双相不锈钢合金表面，随后在250°C下进行热处理。利用场发射扫描电子显微镜（FESEM）、原子力显微镜（AFM）、显微硬度测试、林格氏溶液中的腐蚀测试和抗菌测试对涂层表面的形貌进行了分析。涂层呈现出具有先进结晶和均匀结构的纳米级表面形貌；在利用动电位极化的腐蚀特性方面，HA-ZnO涂层的三层显示出具有更高硬度值（514.75HV）的先进纳米结构。抗菌测试表明，HA-TiO的三层和TiO-ZnO的两层对阳性细菌敏感。
