Abstract
Since advanced ceramics such as alumina and silicon nitride are considered for use in a variety of structural applications at elevated-temperature, it is very important to evaluate the strength and fracture resistance at elevated-temperature. The results reported so far revealed that the viscous glass phase which exists at the grain boundaries significantly influences the creation of intergranular cavities and the subcriticai crack growth (SCG) above a specific temperature depending on materials1~9. Above that temperature, it has been observed that the fracture toughness and R-curve depended on loading rate7, and that the fracture toughness increased abruptly with increasing temperature8. The fatigue strength under cyclic loading above the temperature depended on loading frequency, and was higher than that under static loading9.
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Ogawa, T., Hirose, M., Tokaji, K. (1995). Evaluation of Elevated-Temperature Crack Growth in Ceramics under Static and Cyclic Loads. In: Bradt, R.C., Brookes, C.A., Routbort, J.L. (eds) Plastic Deformation of Ceramics. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-1441-5_56
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DOI: https://doi.org/10.1007/978-1-4899-1441-5_56
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