Fatigue damage mechanisms in CeO2 stabilized tetragonal ZrO2
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Date
2002-06-01
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Springer Nature
Abstract
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.
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Keywords
Polymers, Fatigue, Damage, Cerium oxides, Cerium compounds, Zirconium, Acoustic emission testing, Fracture properties, Grain size, Phase transformations, Polycrystals, Scanning electron microscopy
Citation
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