期刊
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
卷 104, 期 2, 页码 816-823出版社
WILEY
DOI: 10.1111/jace.17482
关键词
borosilicate glass; densification; fictive pressure; fictive temperature; volume relaxation
资金
- FH2020 Marie Sklodowska-Curie Actions [642029]
- Deutsche Forschungsgemeinschaft [GZ: DI 2545]
The study investigates the effect of pressure history on the relaxation behavior of borosilicate glasses, finding that high-pressure treatment affects the glass relaxation properties. Additionally, a new relaxation model is proposed and verified for volume recovery data under different compression methods, showing the pressure and temperature dependence of volume relaxation.
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(R)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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据