Department of Mechanical Engineering, SIMATS School of Engineering, Chennai, 602 105 Tamil Nadu, India.
Department of Mechanical Engineering, Ajeenkya DY Patil School of Engineering Lohegaon Pune, India.
Biomed Res Int. 2023 May 5;2023:6297372. doi: 10.1155/2023/6297372. eCollection 2023.
Considering the unique properties of magnesium and its alloy, it has a vast demand in biomedical applications, particularly the implant material in tissue engineering due to its biodegradability. But the fixing spares must hold such implants till the end of the biodegradation of implant material. The composite technology will offer the added benefits of altering the material properties to match the requirements of the desired applications. Hence, this experimental investigation is aimed at developing a composite material for manufacturing fixing spares like a screw for implants in biomedical applications. The matrix of AZ63 magnesium alloy is reinforced with nanoparticles of zirconium (Zr) and titanium (Ti) through the stir casting-type synthesis method. The samples were prepared with equal contributions of zirconium (Zr) and titanium (Ti) nanoparticles in the total reinforcement percentage (3%, 6%, 9%, and 12%). The corrosive and tribological studies were done. In the corrosive study, the process parameters like NaCl concentration, pH value, and exposure time were varied at three levels. In the wear study, the applied Load, speed of sliding, and the distance of the slide were considered at four levels. Taguchi analysis was employed in this investigation to optimize the reinforcement and independent factors to minimize the wear and corrosive losses. The minimum wear rate was achieved in the 12% reinforced sample with the input factor levels of 60 N of load on the pin, 1 m/s of disc speed at a sliding distance was 1500 m, and the 12% reinforce samples also recorded a minimum corrosive rate of 0.0076 mm/year at the operating environment of 5% NaCl-concentrated solution with the pH value of 9 for 24 hrs of exposure. The prediction model was developed based on the experimental results.
考虑到镁及其合金的独特性质，它在生物医学应用中有着广泛的需求，特别是作为可生物降解的组织工程植入材料。但是，固定备件必须在植入材料完全降解之前固定住这些植入物。复合材料技术将提供额外的好处，即改变材料性能以满足所需应用的要求。因此，本实验研究旨在开发一种复合材料，用于制造生物医学应用中植入物的固定备件，如螺钉。AZ63 镁合金的基体通过搅拌铸造型合成方法增强了纳米级的锆（Zr）和钛（Ti）颗粒。在总增强百分比（3%、6%、9%和 12%）中，样品中Zr 和 Ti 纳米颗粒的添加量相等。对腐蚀性和摩擦学进行了研究。在腐蚀性研究中，过程参数如 NaCl 浓度、pH 值和暴露时间在三个水平上变化。在磨损研究中，考虑了四个水平的应用载荷、滑动速度和滑动距离。本研究采用田口分析来优化增强和独立因素，以最小化磨损和腐蚀性损失。在输入因子水平为 60N 的销钉载荷、1m/s 的圆盘速度和 1500m 的滑动距离下，12%增强样品的磨损率最低，而在 12%增强样品中，在操作环境为 5%NaCl 浓度、pH 值为 9 和暴露 24 小时的条件下，腐蚀性速率最低，为 0.0076mm/年。基于实验结果，建立了预测模型。
