CLINICAL ANALYSIS OF BLOOD TRACES OF RATS AFTER SUBCUTANEOUS IMPLANTATION OF Nd-Fe-B MAGNETS WITH PROTECTIVE PVD ZrN COATINGS

Abstract

It is possible to increase the effectiveness of treatment of various anomalies of occlusion with the help of orthodontic appliances, including permanent magnets as components. But a significant disadvantage of magnetic materials is low corrosion resistance, which can be prevented by applying to the magnets various PVD protective coatings leading to passivation of the surface of the magnetic material. The effect of Nd-Fe-B magnets with and without protective ZrN coating after subcutaneous implantation in rats on the results of laboratory blood tests has been evaluated.

Effect of Incomplete Replacement of Cr for Cu in the Deposited Alloy of Fe–C–Cr–B–Ti Alloying System with a Medium Boron Content (0.5% wt.) on its Corrosion Resistance

“…Reinforcement of the parts working surfaces is carried out by friction [11] and ultrasonic impact treatment [12][13][14]. Chemical-thermal methods of hardening became widely used: sulfidation [15], boriding [16], ionic deposition [17][18][19][20], cementation [21] and eutectic coatings receiving [22]. Functional single-layer oxide coatings [23], double-layer [24][25][26], and multilayer oxide coatings [27], nanocomposite coatings with metal bond and diamond content [28], with non-metallic bond and diamond content [29], and nanooxides [30,31], as well as discrete coatings are used [32].…”