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.
Results
Showing 1 to 10 of 10 for “"Mg2Si"”.
-
Synthesis and thermoelectric properties of Mg2Si-Mg2Sn solid solutions for waste heat recovery
Mg2Si-Mg2Sn solid solutions are promising thermoelectric materials for vehicle waste-heat recovery owing to their high figure-of-merit (ZT), light weight, low cost, and non-toxicity. The optimized ZT of Mg2Si0.4Sn0.6 peaks at ∼ 750 K because its relatively narrow band gap results in the pronounced …
-
Superconductivity of a Precipitation Hardening Alloy of Aluminum
… The alloy studied contains approximately 1.1% Mg2Si and the hardening process involves the precipitation of Mg2Si from a supersaturated solid solution. The purpose of this study was to determine the effect of the lattice distortions produced by the precipitating particles on the superconducting …
-
Modifizierung der Werkstoffe auf Basis von Magnesiumsilicid mit Hilfe der Spark-Plasma-Synthese
Die umfangreichen Untersuchungen ausgewählter Mg2Si-basierter Materialien innerhalb dieser Arbeit zeigen neue Wege für die Anwendung der SPS-Technik in der Grundlagen- als auch angewandten Forschung und liefern entscheidendes, neues Material für die Charakterisierung der Li-Verbindungen Li2xMg2-xX …
-
Fabrication and Characterization of Thermoelectric Materials and Their Stable Contacts at Elevated Temperatures
… were evaluated as potential contact metals to Mg2Si used for moderate temperature applications. The data indicate that Ni is the best candidate among the four: it can be stable up to 400°C. The contact failure analysis showed that Ni diffuses into Mg2Si after annealing at 450°C for as short as …
-
Dispersion and Integration of Dopants by Mechanical Alloying in Complex Hydrogen Storage Materials
… of the proposed forward dehydriding mechanism to Mg2Si was obtained in the MgH 2 + Si system using energy dispersive spectroscopy and electron diffraction. In addition, particle sizes were calculated for catalysts added to this system, and electron tomography was applied to determine the …
-
The Fabrication of Thermoelectric Materials Using Functionalised Silicon Nanoparticles
… that of other thermoelectric materials such as Mg2Si, PbTe and Si-Ge alloy. To investigate the effects that the doping of ligands have on the thermoelectric properties of such materials, terthiophene functionalised SiNPs were synthesised and subsequently doped using varying levels of NOBF4. The …
-
Ageing and strengthening of cold-rolled Al-Mg(-Cu)-Si-Mn alloys: experimental analysis and modelling
… results showed that for cold worked samples, b²(Mg2Si) contributes to age hardening of Cu-free alloys, whilst both b² and S (Al2CuMg) contribute to that of Cu-containing alloys. According to the experimental findings, a yield strength model has been developed to elucidate the relation between …
-
Thermoelectric Energy Harvesting in Harsh Environments and Laser Additive Manufacturing for Thermoelectric and Electromagnetic Materials
… simulate the SLM and DED process for fabricating Mg2Si thermoelectric materials with Si doping. The model incorporates conservation equations and accounts for fluid flow driven by buoyancy forces and surface tension, enabling detailed analysis of process parameters such as laser scanning speed and …
-
Microstructure property development in friction stir welds of aluminim based alloys
… which resulted from the dissolution of Mg2Si during welding. The high dislocation stored energy in the TMAZ, as measured by differential scanning calorimetry, was associated with the geometrically-necessary dislocations which resulted from the interaction with the intermetallic particles …