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Yang, G.; Lu, Ping; Zhao, Lei; Zhu, Lifan; Liu, Xun; Luo, Guoqiang; Zhang, Lianmeng
Journal of the European Ceramic Society, September 2022, 2022-09-00, Letnik: 42, Številka: 12Journal Article
Li2O-Al2O3-SiO2 transparent glass-ceramics (LAS-TGCs) are promising candidates for transparent armour materials due to their excellent physical and mechanical capabilities. In this work, the dynamic behaviour of a LAS-TGC were further investigated using the planar impact technique and photon Doppler velocimetry. The shock stress, shock wave velocity, failure wave velocity and spall strength were obtained. In addition, the recompression signal, as a signature of failure waves, was observed to evolve into an oscillation signal as the impact stress decreases, indicating that the failure wave is gradually formed at a threshold. It has been noted that the failure wave velocity decreases with the increase in external loading and then turns upwards. The damage parameter of the LAS-TGC was assessed to be 0.410(5) under a shock stress of ~5.5 GPa, which is smaller than that of K9 glass. It is suggested that the LAS-TGC has better shock resistance than K9 glass. •A LAS-TGC was prepared via two-step heat treatment.•Planar impact experiments were conducted on the LAS-TGC.•The shock stress, shock wave velocity, failure wave velocity, and spall strength were obtained.•The failure wave is gradually formed at a threshold.•The LAS-TGC has better shock resistance than K9 glass.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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