Thermal Shock Resistance of a Kyanite-Based (Aluminosilicate) Ceramic

Citation:
Rahbar N, Aduda BO, Zimba J, Obwoya SK, Nyongesa FW, Yakub I, Soboyejo WO. "Thermal Shock Resistance of a Kyanite-Based (Aluminosilicate) Ceramic." Experimental Mechanics. 2010.

Abstract:

Abstract This paper presents the results of a combined experimental and theoretical study of microstructure and thermal shock resistance of an aluminosilicate ceramic. Shock-induced crack growth is studied in sintered structures produced from powders with different particle size ranges. The underlying crack/microstructure interactions and toughening mechanisms are elucidated via scanning electron microscopy (SEM). The resulting crack-tip shielding levels (due to viscoelastic crack bridging) are estimated using fracture mechanics concepts. The implications of the work are discussed for the design of high refractory ceramics against thermal shock.

Keywords Viscoelastic crack bridging . Crack-tip shielding . Thermal shock . Refractory ceramics

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