Premium
Volume relaxation in a borosilicate glass hot compressed by three different methods
Author(s) -
Ding Linfeng,
Doss Karan,
Yang Yongjian,
Lee KuoHao,
Bockowski Michal,
Demouchy Sylvie,
Thieme Manuel,
Ziebarth Benedikt,
Wang Qingwei,
Smedskjaer Morten M.,
Mauro John C.
Publication year - 2021
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.17482
Subject(s) - borosilicate glass , volume (thermodynamics) , relaxation (psychology) , materials science , compression (physics) , glass transition , thermodynamics , non equilibrium thermodynamics , ambient pressure , composite material , polymer , psychology , social psychology , physics
The temperature dependence of glass relaxation has been intensively studied; however, the effect of an imposed pressure history on relaxation behavior is poorly understood. In this study, we subjected SCHOTT N‐BK7 ® borosilicate glasses to isostatic compression in a Paterson press (PP) and a gas pressure chamber (GPC). The pressure ranged from 0.1 GPa to 2 GPa for various dwell temperatures and times near the glass transition region. Comparison with our recent results on the same glass using the piston‐cylinder apparatus (PC, 0.5‐1.5 GPa) reveals that the density of a glass, which has been quenched from the equilibrium state under high pressure at 2 K/min (pressure quench), increases approximately linearly with increasing pressure up to 2 GPa. Considering the volume recovery results at ambient pressure, we assert that the preceding high‐pressure treatment in PC (uniaxial loading) generates a similar isostatic pressure effect on N‐BK7 glass as those of PP and GPC treatments. Finally, we verify the previously proposed two‐internal‐parameter relaxation model on the volume recovery data using the three different compression methods. With a new set of parameters in the model, we can account for the pressure and temperature dependence of volume relaxation even for the samples quenched from nonequilibrium states at high pressure.