Tests of fracture toughness on notched specimens (SEVNB) and flexural strength of ceramic materials and ceramic-metal composites in three-point and four- point bending tests, according to ISO 23146 and ISO 14704 standards on a Zwick/Roell ProLine Z050 universal testing machine. Preparation of specimens for the above tests, required specimen size min. 2 x 3 x 20mm.