This PhD thesis addresses the issue of the machinability of ZnO ceramics from the point of view of ensuring the appropriate quality of the final product, the high-voltage varistor. The key identified characteristic for proper performance is the condition of the disc edge and the adhesion strength of the subsequently deposited aluminium layer. The work includes an analysis of the influence of the cutting technology for achieving the desired characteristics of a ZnO varistor disc in terms of achieving a ductile machining regime and also the realistic achievement of purposefully textured surfaces by means of an analytical surface texturing model and an experimentally developed ultrasonic cutting edge oscillation system. This allows to achieve the appropriate adhesion strength of the aluminium layer.
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