IGF::OT::IGF RESEARCH IS PROPOSED TO DEMONSTRATE THE USE OF ADVANCED MANUFACTURING TECHNIQUES TO ENABLE THE…

Public award description

IGF::OT::IGF RESEARCH IS PROPOSED TO DEMONSTRATE THE USE OF ADVANCED MANUFACTURING TECHNIQUES TO ENABLE THE AFFORDABLE APPLICATION OF MULTI-FUNCTIONAL THERMAL/ENVIRONMENTAL BARRIER COATINGS (T/EBCS) HAVING ENHANCED RESISTANCE TO HIGH TEMPERATURE COMBUSTION ENVIRONMENTS. T/EBCS ARE ENVISIONED TO PROTECT THE SURFACE OF SI-BASED CERAMICS AGAINST MOISTURE-ASSISTED, OXIDATION-INDUCED CERAMIC RECESSION. CURRENT T/EBC SYSTEMS HAVE BEEN DEMONSTRATED IN LONG TIME EXPOSURES AT ~2400 F SUBSTRATE TEMPERATURES. HOWEVER, THEIR USE AT ELEVATED TEMPERATURES (I.E., 2700 F SUBSTRATE TEMPERATURES) IS LIMITED BY THE LOW TEMPERATURE STABILITY AND HIGH DIFFUSION ACTIVITY OF CURRENT T/EBC MATERIALS. ONE APPROACH TO INCREASE THE TEMPERATURE CAPABILITY OF THESE SYSTEMS IS THE INCORPORATION OF MULTILAYERED T/EBC DESIGNS. IN THIS EFFORT, ENHANCED PROCESSING TECHNIQUES WILL BE EMPLOYED TO DEMONSTRATE THE MANUFACTURE OF ROBUST T/EBC SYSTEMS USING A PHYSICAL VAPOR DEPOSITION BASED PROCESSING APPROACH WHICH ENABLES IMPROVED COATING ADHESION AND ADVANCED COATING ARCHITECTURAL, COMPOSITIONAL, AND MICROSTRUCTURAL CONTROL, AS WELL AS NON-LINE-OF-SIGHT (NLOS) DEPOSITION. DURING THIS PROPOSED PHASE II EFFORT, PROCESSING/PROPERTY/PERFORMANCE RELATIONSHIPS FOR THE MANUFACTURE OF THE NOVEL COATING ARCHITECTURES WILL BE DETERMINED. OPTIMIZED PROCESSING APPROACHES WILL THEN BE USED TO DEMONSTRATE THE DEPOSITION OF HIGH TEMPERATURE CAPABLE T/EBC SYSTEMS COATING ONTO COMPONENTS OF INTEREST TO GAS TURBINE ENGINE MANUFACTURERS.