中国物理B ›› 2025, Vol. 34 ›› Issue (4): 46101-046101.doi: 10.1088/1674-1056/adb38f

所属专题: SPECIAL TOPIC — Structures and properties of materials under high pressure

• • 上一篇    下一篇

Strain rate effects on pressure-induced amorphous-to-amorphous transformation in fused silica

Wenhao Song(宋文豪)1, Bo Gan(甘波)1, Dongxiao Liu(刘东晓)2, Jie Wu(吴杰)1, Martin T. Dove1, and Youjun Zhang(张友君)1,3,†   

  1. 1 Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China;
    2 National Key Laboratory of Plasma Physics, Laser Fusion Research Center (LFRC), Chinese Academy of Engineering Physics, Mianyang 621900, China;
    3 Key Laboratory of High Energy Density Physics and Technology of Ministry of Education, Sichuan University, Chengdu 610065, China
  • 收稿日期:2024-12-28 修回日期:2025-02-02 接受日期:2025-02-07 出版日期:2025-04-15 发布日期:2025-04-15
  • 通讯作者: Youjun Zhang E-mail:zhangyoujun@scu.edu.cn
  • 基金资助:
    The authors acknowledge Yang Wang, Luyan Zhou, and Haidong Jin for their help in shock-wave experiments. This work was supported by the National Natural Science Foundation of China (Grant Nos. 42422201, 12175211, and 12350710177) and the Sichuan Science and Technology Program (Grant No. 2023NSFSC1910).

Strain rate effects on pressure-induced amorphous-to-amorphous transformation in fused silica

Wenhao Song(宋文豪)1, Bo Gan(甘波)1, Dongxiao Liu(刘东晓)2, Jie Wu(吴杰)1, Martin T. Dove1, and Youjun Zhang(张友君)1,3,†   

  1. 1 Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China;
    2 National Key Laboratory of Plasma Physics, Laser Fusion Research Center (LFRC), Chinese Academy of Engineering Physics, Mianyang 621900, China;
    3 Key Laboratory of High Energy Density Physics and Technology of Ministry of Education, Sichuan University, Chengdu 610065, China
  • Received:2024-12-28 Revised:2025-02-02 Accepted:2025-02-07 Online:2025-04-15 Published:2025-04-15
  • Contact: Youjun Zhang E-mail:zhangyoujun@scu.edu.cn
  • Supported by:
    The authors acknowledge Yang Wang, Luyan Zhou, and Haidong Jin for their help in shock-wave experiments. This work was supported by the National Natural Science Foundation of China (Grant Nos. 42422201, 12175211, and 12350710177) and the Sichuan Science and Technology Program (Grant No. 2023NSFSC1910).

摘要: Fused silica (SiO$_2$ glass), a key amorphous component of Earth's silicate minerals, undergoes coordination and phase transformations under high pressure. Although extensive studies have been conducted, discrepancies between theoretical and experimental studies remain, particularly regarding strain rate effects during compression. Here, we examine strain rate influences on the shock-induced amorphous-amorphous phase transitions in fused silica by measuring its Hugoniot equation of state and longitudinal sound velocity ($C_{\rm L}$) up to 7 GPa at strain rates of 10$^6$-10$^7$ s$^{-1}$ using a one-stage light-gas gun. A discontinuity in the relationship between shock velocity ($U_{\rm S}$) and particle velocity ($U_{\rm P}$) and a significant softening in $C_{\rm L}$ of fused silica were observed near $\sim 5 $ GPa under shock loading. Our results indicate that high strain rates restrict Si-O-Si rotation in fused silica, modifying their bonds and increasing silicon coordination. The transition pressure by shock compression is significantly higher than that under static high-pressure conditions (2-3 GPa), which agrees with some recent theoretical predictions with high compression rates, reflecting the greater pressure needed to overcome energy barriers with the strain rate increase. These findings offer insights into strain rate-dependent phase transitions in fused silica and other silicate minerals (e.g., quartz, olivine, and forsterite), bridging gaps between theoretical simulations and experiments.

关键词: fused silica, shock compression, phase transition kinetics, strain rate

Abstract: Fused silica (SiO$_2$ glass), a key amorphous component of Earth's silicate minerals, undergoes coordination and phase transformations under high pressure. Although extensive studies have been conducted, discrepancies between theoretical and experimental studies remain, particularly regarding strain rate effects during compression. Here, we examine strain rate influences on the shock-induced amorphous-amorphous phase transitions in fused silica by measuring its Hugoniot equation of state and longitudinal sound velocity ($C_{\rm L}$) up to 7 GPa at strain rates of 10$^6$-10$^7$ s$^{-1}$ using a one-stage light-gas gun. A discontinuity in the relationship between shock velocity ($U_{\rm S}$) and particle velocity ($U_{\rm P}$) and a significant softening in $C_{\rm L}$ of fused silica were observed near $\sim 5 $ GPa under shock loading. Our results indicate that high strain rates restrict Si-O-Si rotation in fused silica, modifying their bonds and increasing silicon coordination. The transition pressure by shock compression is significantly higher than that under static high-pressure conditions (2-3 GPa), which agrees with some recent theoretical predictions with high compression rates, reflecting the greater pressure needed to overcome energy barriers with the strain rate increase. These findings offer insights into strain rate-dependent phase transitions in fused silica and other silicate minerals (e.g., quartz, olivine, and forsterite), bridging gaps between theoretical simulations and experiments.

Key words: fused silica, shock compression, phase transition kinetics, strain rate

中图分类号:  (Glasses)

  • 61.43.Fs
64.70.P- (Glass transitions of specific systems) 91.60.Gf (High-pressure behavior) 91.60.Hg (Phase changes)