SAFirE™ Transparent Protection Solutions address the ever-increasing demands of high-velocity (kinetic energy) projectile protective performance at a reduced weight and thickness. Results from our designs have shown a greater than 50% reduction in weight and thickness at improved kinetic energy protective performance compared to traditional glass solutions. Alternatively, performance can be significantly enhanced without increasing weight and thickness. Sapphire is superior over ALON® and Spinel in optical and stopping power protective performance and is immediately available for high volume, large aperture platforms.
Our SAFirE transparent protective product line incorporates EFG™ Sapphire, the hardest transparent material 2nd only to diamond, which provides an extremely hard and abrasion-resistant strike face that ‘breaks’ the projectile upon impact. SAFirE solutions have been designed to meet a variety of threat levels at reduced weight and thickness while providing improved situational awareness in both the visual and Infra-Red spectra. SAFirE is currently being used in both ground vehicle and rotary-wing platforms.
Choosing the proper material depends on forces experienced by the part, required wavelength range of the optics, overall weight envelope of the platform, and other design constraints.
Material Comparison to Saint-Gobain Synthetic Sapphire Window
|Material||Type||Density g/cc||Areal Density psf/in||Young's Modulus Gpa||Knoop Hardness Kg/mm2||Fracture Toughness MPa-m1/2||Thermal Conductivity W/m-K||Thermal Expansion 10-7/K|
|Spinell||3.58||18.6||277||1645||1.5 - 2||14.7||60|
|Soda-Lime Glass||Glass||2.52||13.1||69.6||585||0.75||0.9 - 1.3||90|
|Li-Alumino-Silicate||Glass-Ceramic||2.52||13.1||88.5||570||1.1||1.6 - 1.3||0|
- Ground vehicles
- Rotary wing aircraft
- Protective shields
- Personal protection
- Building/facility security