Information Extraction from Text Through Learning and Visualization

Not Available Lightweight ceramic composites that exhibit high strengths and high toughnesses even at elevated temperatures are of particular interest for ballistic missiles, advanced gas turbine engines, unmanned combat aero vehicles, and other structural applications. Such ceramic composites include glass/glass ceramic matrices reinforced with high strength and high modulus SiC fibers and are known to exhibit damage resistance and non-catastrophic failure characteristics. However, the low corrosion resistance and inadequate high temperature creep resistance, make SiC(f)-toughened glass matrix composites unsuitable for many structural applications. LoTEC, therefore, proposes the development and commercialization of SiC(fiber)- reinforced high temperature structural composites involving fully crystalline, sodium zirconium phosphate (NZP) matrices. Two lightweight NZP compositions viz. Sr1+xZr4P6-2xSi2xO24 (SS-50) and Ca1-xSrxZr4P6O24 (CS-50) are known for their: (i) high temperature stability, (ii) moderately low thermal expansion, (iii) good thermomechanical and thermochemical compatibility with SiC, (iv) creep resistance, and (v) good hot corrosion resistance. Phase I activity will focus on processing dense SiC(f)-NZP composites with and without an NZP-based interface coating and evaluating their physical, chemical and thermomechanical properties. In Phase II, extensive microstructural and engineering analysis will be conducted to refine processing and design of the composites to achieve the optimum matrix, interface, and composite properties.