Comparison of cavitation erosion resistance of mullite and zircon samples based on non destructive characterization

Mullite and zircon are widely used for different applications for refractory materials. In this paper their cavitation erosion resistance will be investigated. Cavitation erosion resistance testing will be applied using standard the ultrasonic vibratory cavitation set up with stationary specimen. Weight loss, image analysis, and ultrasonic measurements (Dynamic Young modulus of elasticity) will be used for determination of the effects of cavitation. In this paper image analysis will be implemented for monitoring degradation level during the testing, as well as number of formed pits and their characterization (average diameter and area). Ultrasonic measurements will be related to the determination of Dynamic Young modulus of elasticity. Ultrasonic velocities will be measured and used as controlling factor for degradation level during the cavitation erosion testing. Obtained results will be discussed in order to compare and analyze resistance of the different materials (mullite and zircon) to cavitation erosion as well as strengths and weaknesses of the used methodology