Sr. Choi et Ja. Salem, THERMAL-SHOCK BEHAVIOR OF SILICON-NITRIDE FLEXURE BEAM SPECIMENS WITHINDENTATION CRACKS, Journal of the American Ceramic Society, 77(3), 1994, pp. 835-838
The experimental results of thermal shock testing of silicon nitride f
lexure beam specimens containing indentation cracks are presented. The
thermal stress induced by water quenching is much greater in the tran
sverse direction than in the longitudinal direction, resulting in an i
nsensitivity of residual bend strength to temperature differences up t
o 580-degrees-C. This result indicates that a flexure beam configurati
on is not an appropriate geometry for thermal shock testing when therm
al shock behavior is to be evaluated from residual bend strength data.