| Abstrakt: |
Ceramics based on partially stabilized zirconium dioxide are widely used in dentistry. The surface of a ceramic product is subjected to aerodynamic abrasive processing for reliable durable fixing before applying polymer cement. The mechanical properties of a machined thin ceramic layer are largely determined by its phase composition. The method of X-ray phase analysis is used to study the effect of aerodynamic abrasive treatment on the phase state of the surface layers of partially stabilized zirconium dioxide, depending on the type and conditions of formation of the developed microrelief. It is found that aerodynamic abrasive treatment is accompanied by a change in the initial phase composition, i.e., the appearance of a new monoclinic phase. The monoclinic phase is shown to be removed during thermal annealing at a temperature of no less than 1000°C. As an alternative to aerodynamic abrasive treatment prior to the application of polymer cement, it is proposed that the bonded surface be treated with a high-current pulsed beam of low-energy electrons. Such processing creates a developed surface microrelief without introducing a monoclinic phase in it. [ABSTRACT FROM AUTHOR] |
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