TY - JOUR

T1 - Crack growth in borate and silicate glasses

T2 - Stress-corrosion susceptibility and hydrolytic resistance

AU - Waurischk, T.

AU - Müller, R.

AU - Behrens, H.

AU - Deubener, J.

N1 - Funding Information: The authors grateful acknowledge financial support from the Deutsche Forschungsgemeinschaft DFG within the framework programm SPP1594 (grant number MU 963/14–2) and A. Marek, S. Rüster, K. Junicke for sample preparation. Warm thanks to M. Ostermann for the XRF measurements. Also acknowledged is Prevac GmbH for providing crucial support in the conception and construction of the DCB apparatus.

PY - 2021/1/1

Y1 - 2021/1/1

N2 - A double cantilever beam technique in air equipped with ultrasound modulation was used to measure the crack velocity v in borate and silicate glasses. In all glasses v and the stress intensity KI followed the empirical correlation v ~ KIn. Indicated by its smallest KI at v = 1 µm s − 1, KI* = 0.27 MPa m0.5, the silicoborate glass containing 70 mol% B2O3 was found most susceptible to stress-corrosion enhanced crack growth. Contrarily, the sodium calcium magnesium silicate glass appeared least susceptible with KI* = 0.57 MPa m0.5. No clear correlation is evident between KI*, reflecting the stress-corrosion susceptibility, and the hydrolytic resistance for all glasses under study, but values of n obtained from the present study and taken from previous literature for 35 glasses tend to decrease with increasing network modifier ion fraction. Energy dissipation during stress-corrosion enhanced crack propagation is assumed to cause this trend.

AB - A double cantilever beam technique in air equipped with ultrasound modulation was used to measure the crack velocity v in borate and silicate glasses. In all glasses v and the stress intensity KI followed the empirical correlation v ~ KIn. Indicated by its smallest KI at v = 1 µm s − 1, KI* = 0.27 MPa m0.5, the silicoborate glass containing 70 mol% B2O3 was found most susceptible to stress-corrosion enhanced crack growth. Contrarily, the sodium calcium magnesium silicate glass appeared least susceptible with KI* = 0.57 MPa m0.5. No clear correlation is evident between KI*, reflecting the stress-corrosion susceptibility, and the hydrolytic resistance for all glasses under study, but values of n obtained from the present study and taken from previous literature for 35 glasses tend to decrease with increasing network modifier ion fraction. Energy dissipation during stress-corrosion enhanced crack propagation is assumed to cause this trend.

KW - Alkali and alkaline earth silicate and borate glass, crack growth in air, dcb, stress-corrosion, stress intensity

UR - http://www.scopus.com/inward/record.url?scp=85091988688&partnerID=8YFLogxK

U2 - 10.1016/j.jnoncrysol.2020.120414

DO - 10.1016/j.jnoncrysol.2020.120414

M3 - Article

AN - SCOPUS:85091988688

VL - 551

JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

SN - 0022-3093

M1 - 120414

ER -