APPLICABILITY ASSESSMENT OF THE VICKERS INDENTATION FOR DETERMINING THE FRACTURE TOUGHNESS OF YTTRIA-STABILIZED ZIRCONIA
Crack growth resistance of ZrO2-(3-8) mol% Y2O3 ceramics was investigated. Young's modulus by the ultrasonic flaw detection method were determined. Vickers hardness and parameters of cracks after Vickers indentation were obtained. Based on the Young's modulus values, Vickers hardness, and parameters of cracks, the fracture toughness of the investigated ceramics was calculated using 9 different equations of the Vickers indentation method.