Strengthening of borosilicate glass by ion exchange for advanced ballistic impact behaviour. (2016)

• Record Type: Journal Article
• Authors: Ahn, Deok-Lae; Shim, Gyu-In; Kim, Seong-Hwan; Choi, Se-Young; Park, Jong-Kyoo
• Is Part Of: International journal of nanotechnology. Volume 13:Number 4/5/6(2016)
• Page Start: 265
• Page End: 277
• Publication Date: 2016
• Subjects: borosilicate glass -- ion exchange -- bulletproof materials -- energy absorption -- light transmittance -- ballistic impact -- impact behaviour -- impact resistance -- transparent materials -- heat treatment -- flexural strength -- reinforced glass -- polycarbonate sheet -- glass thickness -- ballistic limit velocity; 620.505
• Languages: English
• ISSNs: 1475-7435

Abstract

Borosilicate glass was reinforced via ion exchange to improve the ballistic impact resistance of transparent bulletproof materials. The optimal heat treatment conditions of ion-exchanged borosilicate glass with thicknesses of 4, 6 and 8 mm were 12, 15 and 17 min at 560°C, respectively. The flexural strengths of the reinforced glasses were 0.783 ± 0.018, 0.810 ± 0.014 and 0.835 ± 0.013 GPa, respectively. This improved on that of the parent material by a factor of 2.5. Light transmittance exceeded 91.1%. The bulletproof materials comprised one polycarbonate sheet, two multilayer defence films and strengthened glass. The thickness of the bulletproof material decreased by ~18%, from 28.80 mm for the original glass to 23.65 mm for the strengthened glass. The ballistic limit velocity improved by 14% from 851 (V50 ) to 972 (V0 ) m/s. The light transmittance of the material was 86.2%, confirming its potential use as a transparent bulletproof material.