Crystallization in a soda–lime‐silicate glass after high pressure

Abstract This work explored the permanent changes a high pressure (HP) processing could cause on nucleation, Raman vibrational modes, thermal, and mechanical properties of the Na 2 O • 2CaO • 3SiO 2 (N 1 C 2 S 3 ) glass. It was shown that, with higher pressure values, the number of nuclei per unit of volume, N V , has decreased. Raman spectra showed no significant changes in the vibrational modes; however, the differential thermal analysis performed indicated that the glass transition temperatures, T g , were higher than the pristine glass sample and that HP caused the glass to be less stable. The Vickers indentation radial cracks remained constant; however, the lateral cracks increased in size, indicating that the glass is more stressed after HP, and therefore, the relaxation time for nucleation will be higher, lowering N V further, as observed.