Development of "Dropkinson" bar for intermediate strain rate testing
Abstract not provided.
Publications
Development of ?Dropkinson? Bar for Intermediate Strain-rate Testing
Abstract not provided.
Low-Pass Mechanical Filter Evaluation Using Frequency-Based Kolsky Bar Analysis
Abstract not provided.
Low-Pass Mechanical Filter Evaluation Using Frequency-based Kolsky Bar Analyses
Abstract not provided.
Laser-Treatment of Lanthanum Strontium Manganite (LSM) Coatings to Improve Solar Selectivity
Solar Energy Materials and Solar Cels Journal
Abstract not provided.
Feasibility of preparing patterned molybdenum coatings on bismuth telluride thermoelectric modules
Molybdenum electrical interconnects for thermoelectric modules were produced by air plasma spraying a 30%CE%BCm size molybdenum powder through a laser-cut Kapton tape mask. Initial feasibility demonstrations showed that the molybdenum coating exhibited excellent feature and spacing retention (~170%CE%BCm), adhered to bismuth-telluride, and exhibited electrical conductivity appropriate for use as a thermoelectric module interconnect. A design of experiments approach was used to optimize air plasma spray process conditions to produce a molybdenum coating with low electrical resistivity. Finally, a molybdenum coating was successfully produced on a fullscale thermoelectric module. After the addition of a final titanium/gold layer deposited on top of the molybdenum coating, the full scale module exhibited an electrical resistivity of 128%CE%A9, approaching the theoretical resistivity value for the 6mm module leg of 112%CE%A9. Importantly, air plasma sprayed molybdenum did not show significant chemical reaction with bismuth-telluride substrate at the coating/substrate interface. The molybdenum coating microstructure consisted of lamellar splats containing columnar grains. Air plasma sprayed molybdenum embedded deeply (several microns) into the bismuth-telluride substrate, leading to good adhesion between the coating and the substrate. Clusters of round pores (and cracks radiating from the pores) were found immediately beneath the molybdenum coating. These pores are believed to result from tellurium vaporization during the spray process where the molten molybdenum droplets (2623%C2%B0C) transferred their heat of solidification to the substrate at the moment of impact. Substrate cooling during the molybdenum deposition process was recommended to mitigate tellurium vaporization in future studies.
Solar Selective Coatings for Concentrating Solar Power Central Receivers
Advanced Materials and Processes
Abstract not provided.
Copy of Solar Selective Coatings for Concentrating Solar Power Central Receivers
Abstract not provided.
Low Pressure Plasma Spray (LPPS-Thin Film(R)) at Sandia National Laboratories
Abstract not provided.
Development of Testing Methods for Thermal Protection Materials Systems
Abstract not provided.
Long Term Evaluation of Glass Composites for Use as a Reliable SOFC Sealing Material
Abstract not provided.
11 Results