CARBON-CARBON MATERIAL PROPERTY SENSITIVITY

THE THERMOSTRUCTURAL PERFORMANCE SENSITIVITY OF NOZZLES TO CHANGES IN CARBON-CARBON COMPOSITE MATERIAL PROPERTIES HAS BEEN A SIGNIFICANT PROBLEM. THE PROPOSED STUDY WILL IDENTIFY CRITICAL PROPERTIES AND DEVELOP A TEST MATRIX FOR FOR CHARACTERIZING CHANGES IN THESE PROPERTIES AS A FUNCTION OF DENSIFICATION PROCESS AND FINAL HEAT TREATMENT. OUR OBJECTIVE IS TO DETERMINE NOZZLE SENSITIVITY TO CHANGES IN RAW MATERIALS AND COMPOSITE CONSTRUCTION ANALYTICALLY AND THAN IN PHASE II EXPERIMENTAL LY DETERMINE PROCESS-PROPERTY RELATIONS. THE PROJECT IS MULTIDISCIPLINARY, MEANING THAT DESIGN, ANALYSIS AND MANU- FACTURE, AND THEIR INTERACTIONS MUST ALL BE CONSIDERED. WE PROPOSE TO STUDY A BASELINE NOZZLE WITH CARBON-CARBON COMPONENTS MADE FROM GRAPHITE FABRIC AND THREE DIFFERENT DENSIFICATION PROCESSES: CVDQUID PITCH, AND A HYBRID PROCESS.