TRANSPARENT ARMOUR HAVING IMPROVED BALLISTIC PROPERTIES

摘要

T This disclosure teaches the use of low density, "open" - structure glasses as backing glasses (14), behind glass - ceramic strike-faces (12), in transparent armor composite windows. These low density "open- structure 1 glasses are sometimes referred to as "anomalous" glasses. For transparent armor applications both silica, including fused silica, and borosilicate glasses can be used as backing glass. These backing glasses provide improved ballistics performance over that of standard commercial soda lime backing glass. These glasses should be used either in their as -formed state (e.g. float surfaces) or should be finished using a process designed for minimizing sub-surface damage.