Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China.
School of Materials Science and Engineering, Shandong University, Jinan 250061, China.
Molecules. 2023 Jun 1;28(11):4495. doi: 10.3390/molecules28114495.
Magnesium phosphate (MgP) has garnered growing interest in hard tissue replacement processes due to having similar biological characteristics to calcium phosphate (CaP). In this study, an MgP coating with the newberyite (MgHPO·3HO) was prepared on the surface of pure titanium (Ti) using the phosphate chemical conversion (PCC) method. The influence of reaction temperature on the phase composition, microstructure, and properties of coatings was systematically researched with the use of an X-ray diffractometer (XRD), a scanning electron microscope (SEM), a laser scanning confocal microscope (LSCM), a contact angle goniometer, and a tensile testing machine. The formation mechanism of MgP coating on Ti was also explored. In addition, the corrosion resistance of the coatings on Ti was researched by assessing the electrochemical behavior in 0.9% NaCl solution using an electrochemical workstation. The results showed that temperature did not obviously affect the phase composition of the MgP coatings, but affected the growth and nucleation of newberyite crystals. In addition, an increase in reaction temperature had a great impact on properties including surface roughness, thickness, bonding strength, and corrosion resistance. Higher reaction temperatures resulted in more continuous MgP, larger grain size, higher density, and better corrosion resistance.
磷酸镁（MgP）由于具有与磷酸钙（CaP）相似的生物学特性，因此在硬组织替代过程中受到越来越多的关注。在这项研究中，使用磷酸盐化学转化（PCC）法在纯钛（Ti）表面制备了具有新硼镁矿（MgHPO·3HO）的 MgP 涂层。使用 X 射线衍射仪（XRD）、扫描电子显微镜（SEM）、激光共聚焦显微镜（LSCM）、接触角测量仪和拉伸试验机系统地研究了反应温度对涂层的相组成、微观结构和性能的影响。还探讨了 MgP 涂层在 Ti 上的形成机理。此外，通过在 0.9%NaCl 溶液中使用电化学工作站评估电化学行为来研究涂层在 Ti 上的耐腐蚀性。结果表明，温度对 MgP 涂层的相组成没有明显影响，但影响了新硼镁矿晶体的生长和成核。此外，反应温度的升高对表面粗糙度、厚度、结合强度和耐腐蚀性等性能有很大的影响。较高的反应温度导致更连续的 MgP、更大的晶粒尺寸、更高的密度和更好的耐腐蚀性。
