Fatigue damage mechanisms in CeO2 stabilized tetragonal ZrO2

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Springer Nature
Hertzian indentation studies, where an indenting sphere is subjected to single-cycle or repeated loading on a flat ceramic specimen surface, have provided useful insights into contact damage accumulation and fatigue processes at the scale of the microstructure (short-crack region) in numerous ceramic-based systems [1–3]. The nature of the degradation has been shown to be strongly dependent on the material microstructure. In homogeneous, fine-grained ceramic microstructures conical cracks form in the region of limited tension around the contact circle whereas in heterogeneous, coarse-grained microstructures, distributed shear faults develop within a subsurface zone of compression-shear beneath the contact [4]. Cyclic loading of toughened heterogeneous ceramics readily exhibit cumulative damage events at the microscale, leading to strength degradation and material removal [2, 5, 6]. Consequently, the Hertzian test is relevant to assessing fatigue damage mechanisms and evolution on a localized level in ceramics. © 2002 Springer Nature Switzerland AG.
Polymers, Fatigue, Damage, Cerium oxides, Cerium compounds, Zirconium, Acoustic emission testing, Fracture properties, Grain size, Phase transformations, Polycrystals, Scanning electron microscopy
Latella, B. A., Atanacio, A. J., & Liu, T. (2002). Fatigue damage mechanisms in CeO 2 stabilized tetragonal ZrO 2. Journal of Materials Science Letters, 21, 879-882. doi:10.1023/A:1015730813968