Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"half-Heusler"”.
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Half-Heusler Thermoelectric Materials and Modules
… sustainable energy harvesting. In this respect, half-Heusler (hH) alloys are one of the promising high-temperature TE materials due to their high dimensionless thermoelectric figure of merit (zT) along with excellent mechanical and thermal stability. This dissertation demonstrates novel hH …
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Structural Characterization and Thermoelectric Performance of ZrNiSn Half-Heusler Compound Synthesized by Mechanical Alloying
Thermoelectric (TE) ZrNiSn samples with a half-Heusler atomic structure were synthesized by mechanical alloying (MA) and consolidation by either Spark Plasma Sintering (SPS) or hot pressing (HP). X-Ray diffraction patterns of as milled powders and consolidated samples were compared and analyzed for …
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Thermoelectric Properties of Zr0.5Hf0.5Ni1-xPdxSn0.99Sb0.01 and Effect of Nanoinclusions on Transport Properties of Half Heuslers
… Despite having high thermal conductivity, half-Heusler materials are promising candidates for thermoelectric applications due to their relatively high power factor () and the ability to tune the thermal and electrical properties through substitutional doping. 2S </p> <p>In this research …
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Investigation of spin-caloric and spin-orbit torque materials by vectorial spin Seebeck measurements and an advanced x-ray magnetic reflectivity analysis
… there has been considerable interest in magnetic Heusler compounds in the field of spintronics based on their wide range of magnetic properties and susceptibility to manipulation by elemental substitution. In particular half-Heusler alloys are currently attracting growing attention due to their …
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Modeling and Analysis of Advanced Thermoelectric Modules Considering Thermal Losses
… device. Using the experimental results on the half-Heusler, skutterudites, and lead telluride materials, segmented TEG�s have been analyzed for their performance in terms of power and efficiency. Non-linear and temperature-dependent material properties and thermal losses were considered in the …
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Investigation of Iron-Based and Topological Superconductors via Point-Contact Spectroscopy
… Conductivity spectra were also measured for the half-Heusler materials YPtBi and LuPdBi using the soft point contact method. I argue that the repeated observation of a single peak in $dI/dV$ at zero bias is not consistent with a conventional $s$-wave model. Based on attempts to fit my data to the …
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The fabrication of TiO2 nanostructures on porous silicon for thermoelectric application
… SiGe, Mg2X (X = Si, Ge, Sn), skutterudite, and half-Heusler alloys. However, there are some problems arise since most of these rare earth alloy-based TE materials, such as Bi2Te3 and PbTe, suffer from thermal and chemical instabilities. Besides, it is also high toxicity, relatively low …
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Synthesis and Characterization of Heusler Compounds with Non-Collinear Magnetic Structure - From Spin Glasses to Spin Reorientation
Heusler compounds form a large class of intermetallic materials, which attracted a lot of interest in recent years. The reason is their enormous flexibility, which makes it possible to observe almost every physical effect in one of the 1000 members known nowadays. Especially many magnetic Heusler …
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Improvement of Thermoelectric Properties Through Manipulation of their Microstructure: the Effect of Graphene Reinforcement
… crystal structures (e.g., Chalcogenides and half-Heusler), and developing environmentally-friendly (i.e., lead-free) TE products. The bulk samples with the addition of small quantities of GNPs (0.25, 0.5, 0.75, and 1 wt. %) were synthesized using powder metallurgy and fabricated by spark …
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Processing, Structure and Properties of High Temperature Thermoelectric Oxide Materials
… values such as Bi2Te3, PbTe, skutterudites, and half-Heusler alloys, are not thermally stable at temperatures approaching 500°C or higher, due to the presence of volatile elements. Oxide thermoelectric materials are considered to be potential candidates for high temperature applications due to …
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System Design, Fabrication, and Characterization of Thermoelectric and Thermal Interface Materials for Thermoelectric Devices
… for high temperature applications such as half-Heusler alloys. In addition, I discuss the characterization of unique oxide thermoelectric materials, which are Al doped ZnO and Ca-Co-O systems for high temperature applications. Chapter Four of this dissertation addresses the use of GaSn …