Structurally Reinforced Omni-Functional Near Net Geometry Windows

RF signature requirements for modern aircraft are driving the need for conformal window for future sensor systems. However, limitations on optical systems and physical properties of optically transparent materials currently limit the geometry of current windows and window assemblies. Novel material systems developed by Surmet combine different materials (e.g. ductile metal etc) into structures that combine transparency with structural integrity. Surmet"s ability to incorporate metal and internal structures into ceramic windows holds out the promise of creating Structurally Reinforced OmNi-functional Geometric (STRONG) windows for future aircraft applications. In the Phase I program, Surmet has demonstrated a ~ 2 fold increase in the toughness and strength of base ALON by additions of a second phase metal. Other unique structures enabling use of several high energy-absorbing reinforcements (metallic, polymer or elastomer) with either ALON or Spinel have also been demonstrated. In Phase II, Surmet proposes to refine and transition this effort to develop full sized toughened ALON or Spinel windows. The reinforcement properties, dimensions, spacing will be well controlled to simultaneously provide desired transmission (~80%) and structural properties viz strength of>500 MPa and fracture toughness of ~5 MPa.m0.5. The newly designed structural windows should provide sufficient deterrent against high velocity threats. BENEFIT: Successful completion of this program will result in a fabrication of structural and optically transparent ceramics with OmNi-functional capabilities. The commercial opportunity for this technology may extend to the fabrication of other specific applications for transparent ceramics, such as for smart windows, sensors, specialized equipment for chemical processing, equipment, etc.