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http://dx.doi.org/10.9766/KIMST.2013.16.3.358

Crystallization of Borosilicate Glasses for High-Strength Bulletproof Materials  

Lee, Hyun-Suk (Younsei University)
Shim, Gyu-In (Younsei University)
Choi, Se-Young (Younsei University)
Publication Information
Journal of the Korea Institute of Military Science and Technology / v.16, no.3, 2013 , pp. 358-364 More about this Journal
Abstract
Borosilicate glass(GVB-Solutions in glass, 2mm, Germany) was prepared in the composition of $80.4SiO_2-4.2Na_2O-2.4Al_2O_3-13.0B_2O_3$. The 2-step crystallization was performed around $584^{\circ}C$ of glass transition temperature ($T_g$), and $774^{\circ}C$ of crystallization temperature($T_c$). The maximum nucleation rate was $8.8{\time}10^9/mm^3{\cdot}hr$ at $600^{\circ}C$ and the maximum crystal growth rate was 3.5nm/min at $750^{\circ}C$. The maximum mechanical properties were observed at 22.8% of volume fraction, the strength, hardness and fracture toughness was 555MPa, $752kg/mm^2$, $1.082MPa{\cdot}mm^{1/2}$. The crystal size of 177nm which has volume fraction of 22.8% showed maximum strength of 562MPa, it is about 157% higher than parent borosilicate glass. From these results, the crystallized borosilicate glass can be applied weight lighting of bullet proof materials.
Keywords
Borosilicate Glass; Crystallization; Bulletproof Materials;
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Times Cited By KSCI : 1  (Citation Analysis)
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