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Advanced Manufacturing Office Materials in a High Temperature Service Environment Professor John H. Perepezko University of Wisconsin-Madison Department.

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Presentation on theme: "Advanced Manufacturing Office Materials in a High Temperature Service Environment Professor John H. Perepezko University of Wisconsin-Madison Department."— Presentation transcript:

1 Advanced Manufacturing Office Materials in a High Temperature Service Environment Professor John H. Perepezko University of Wisconsin-Madison Department of Materials Science and Engineering 1509 University Ave. Madison, WI 53706 Materials for Harsh Service Conditions Workshop November 19-20, 2015, Westin Convention Center Hotel Pittsburgh, PA

2 Challenges for Materials Performance in a Harsh High Temperature Service Environment Temperature range 1) 1200-1850 F (648-1010 C) – Current/Near Term 2) >1850 F—Longer Term Environmental/Service Degradation Oxidation – Isothermal; Thermal Cycling Hot Corrosion (fuel impurities) CMAS (Sand, Ash) Steam Creep Rupture/Fatigue Wear/ Erosion Phase Stability – Long Term Microstructural Stability- Long Term Long Term life prediction

3 Applications Transportation Fossil Fuel Nuclear Solarthermal Geothermal Manufacturing Scale up – Lab Scale  Commercial Low Cost Low Density Performance Diagnostics-In-Situ Sensors Sustainability Environmental Recycle Materials Availability

4

5 The Hotter The Better

6

7 Materials Options

8 Solarthermal Reactors require high temperatures for power generation and chemical reactions. Several key components require new materials to achieve potential.

9 1-TBC/EBC 2-Oxidation Resistant 3-Compatibility (Bond Coat) 4-Reservoir/Diffusion Barrier Substrate Functional Coating Design – Environmental Resistance Layers/Substrate mechanical compatibility Layers/Substrate thermodynamic compatibility At ultrahigh temperature silica is favored over alumina.

10 Progress-Mo-Si-B Coated Pure Molybdenum Oxidized in Air at 1700 o C/3092 o F 1700 o C / 2 hrs1700 o C / 12 hrs1700 o C / 25 hrs Mass Change: + 1.7 mg/cm 2 (1700 o C /25hrs)

11 The Path Forward - Materials Challenges/Strategies Incremental (1200-1850F) Ultrahigh Strength Steels (Alumina Former) ODS—Manufacturing Scaleup Austenitic with intermetallics—Phase Stability Functional Coatings Semi-Empirical to Guided Design- Thermodynamic (Calphad); Mechanical Application Methods- Commercial Scale Amorphous/Nanocrystalline Wear/Corrosion Environmental Barrier Coatings, EBC (Silica) Longer Term – Ultrahigh Temperature (>1850F)- High Payoff Refractory Metal (Mo, Nb)Alloys (Mechanical, Silica Former) Ceramic Composites – SiC/SiC (EBC, Processing) Advanced Coating Capability

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