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 will have to be developed which combine different materials (e.g. ductile metal with transparent ceramic) into structures that combine transparency with structural integrity. Surmet’s demonstrated ability to produce novel ceramic/metal structures will allow us to produce load bearing windows, in conformal shapes required for future aircraft applications. Furthermore, the ability to incorporate metal structures into ceramic windows also holds out the promise of creating Omni-functional windows which might include RF antennas in addition to providing IR transparency. This approach is the basis for the current proposal entitled Structurally Reinforced OmNi-functional Geometric (STRONG) windows. Surmet is uniquely qualified to perform this development effort, given our demonstrated competence in ALON and spinel processing. Surmet proposes to develop full sized ALON or Spinel windows toughened with energy-absorbing reinforcements (metallic, polymer or elastomer). The reinforcement properties, dimensions, spacing can be well controlled to simultaneously provide desired transmission (>80%) and structural properties viz strength of >500 MPa and fracture toughness of ~5 MPa.m1/2. 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.