抄録
Effects of dissolution treatment on the Charpy impact value (a_uc) of transparent silicate glasses were studied under 0.18 MPa at 390 Kin the distilled water. The dissolution phenomenon was confirmed by the clearly mass decrease of transparent silicate glasses. Dissolution treatment at less than 0.3 h enhanced a_uc values at the low fracture probability (P_f) of 0.06 were about 5.5 and 4.4 times higher than those of untreated soda and borosilicate glasses, respectively. Additional dissolution treatment at time after more than 1.0 h clearly reduced the a_uc values of both glasses. Consequently, dissolution treatment at short time raised the impact fracture toughness of transparent silicate glasses.
