Relationship between fracture resistance and critical temperature difference in ceramic materials
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The resistance of ceramics to thermal shock can be characterized using either a parameter of their resistance to fracture R or the critical temperature difference ΔT c=ΔT c(Bi). It is demonstrated that a correlation exists between the values ofR and ΔT c. Experiments were performed on alumina-based ceramic materials (99.8 and 86% Al2O3), glass-bonded mullite, and a borosilicate glass. Three equations were used to describe the dependence of the critical temperature difference on the Biot number. A relationship between the critical temperature difference and the parameterR was considered and the best correlation between the values ofR and ΔT c was established using statistical analysis techniques. It is shown that the correlation can be described satisfactorily in terms of a linear dependence.
KeywordsThermal Stress Ceramic Material Thermal Shock Fracture Resistance Fracture Resis
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