Bejinariu Costică, Paleu Viorel, Stamate Ciprian Vasile, Cimpoesu Ramona, Cimpoesu Margareta, Badarau Gheorghe, Axinte Mihai, Istrate Bogdan, Vasilescu Gabriel Dragos, Cimpoeșu Nicanor
Materials Science and Engineering Faculty, Gheorghe Asachi Technical University of Iasi, 700050 Iasi, Romania.
Mechanical Engineering, Mechatronics and Robotics Department, Mechanical Engineering Faculty, Gheorghe Asachi Technical University of Iasi, 700050 Iași, Romania.
Materials (Basel). 2022 Dec 16;15(24):9013. doi: 10.3390/ma15249013.
An usual material, EN-GJL-250 cast iron, used for automotive braking systems, was covered with a ceramic material (105NS-1 aluminium oxide) using an industrial deposition system (Sulzer Metco). The main reason was to improve the corrosion and wear (friction) resistance properties of the cast-iron. Samples were prepared by mechanical grinding and sandblasting before the deposition. We applied two and four passes (around 12-15 µm by layer) each at 90° obtaining ceramic coatings of 30 respectively 60 µm. The surface of the samples (with ceramic coatings) was investigated using scanning electron microscopy (SEM), dispersive energy spectroscopy (EDS) and X-ray diffraction (XRD). Scratch and micro-hardness tests were performed using CETR-UMT-2 micro-tribometer equipment. The better corrosion resistance of the base material was obtained by applying the ceramic coating. The results present a better corrosion resistance and a higher coefficient of friction of the coated samples.
一种用于汽车制动系统的常用材料——EN-GJL-250铸铁，通过工业沉积系统（苏尔寿美科）覆盖了一层陶瓷材料（105NS-1氧化铝）。主要目的是提高铸铁的耐腐蚀和耐磨（摩擦）性能。在沉积之前，通过机械研磨和喷砂制备样品。我们分别以90°进行了两次和四次涂层（每层约12 - 15微米），从而分别获得了30微米和60微米厚的陶瓷涂层。使用扫描电子显微镜（SEM）、能量色散光谱（EDS）和X射线衍射（XRD）对（带有陶瓷涂层的）样品表面进行了研究。使用CETR-UMT-2微观摩擦磨损试验机进行了划痕和微硬度测试。通过施加陶瓷涂层，获得了基体材料更好的耐腐蚀性。结果表明，涂覆样品具有更好的耐腐蚀性和更高的摩擦系数。
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