부산대학교 도서관

The regularities of formation of coatings with the particles of [beta]-tricalcium phosphate ([beta]-TCP) by micro- arc oxidation method on the metal substrates of Ti, Ti-40Nb, and Mg0.8Ca alloys were studied. The effect of the electrophysical properties of the transitional oxide layer on the structural-morphological and adhesive properties of the coatings was established. The small values of the band gap and the high dielectric constants of Ti[O.sub.2] and [Nb.sub.2][O.sub.5] oxides contributed to the transmission of cascades of micro-arc discharges with a low intensity. In this case, MgO oxide with a low dielectric constant accumulated a large amount of electrical energy, which was released in the form of powerful discharges. Coatings on the Mg0.8Ca alloy were characterized by high thickness and roughness, contained the largest amount of the crystalline phase, and had good adhesive properties. The maximum critical load value of 17 N was noted for the coating on the Mg0.8Ca alloy, and the minimum value of 7 N was observed for the coating on the Ti-40Nb alloy. Keywords: calcium phosphate coating, oxide layer, [beta]-tricalcium phosphate particles, band gap, dielectric constant, adhesive strength.
UDC 621.794.61 INTRODUCTION Metallic materials are widely used in clinical practice for the treatment of injuries, fractures, and replacement of bone defects. The most common for the creation of medical [...]