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 20 of 43 for “"immiscibility"”.
-
Aluminum Beryllium Composites Produced by Rapid Solidification (Metastable Equilibrium, Modulus Hardening, Liquid Immiscibility)
Al-Be alloys, 4.4-20 at.% Be in composition, have been rapidly solidified by laser surface remelting and melt-spinning. Microstructures of uniform dispersions of spherical Be particles (10-15 nm in diameter), randomly dispersed in an Al matrix were produced for compositions 5-8 at.% Be. Two crystal …
-
Experimental study of the effect of H2O-CO2-NaCl fluid immiscibility on the reaction calcite + quartz + rutile = sphene + CO2 at 2 KBAR
The minimum T-XCO₂ location of the reaction boundary calcite + quartz + rutile = sphene + CO₂ has been experimentally determined in H₂0-CO₂-NaCl fluids at 2 kbar. Extent and direction of reaction were monitored by the CO₂ weight change method using natural materials. All bulk compositions contain …
-
The 'Ins' and 'Outs' of the Bushveld Complex Upper Zone
… indicate a role for large-scale (>625 m) liquid immiscibility at the top of the Bushveld. This is the first documented evidence for liquid immiscibility based on the compositions of mineral phases, not melt inclusions; and it is the first quantitative evidence for large-scale immiscibility in the …
-
Study of gold-based alloy phase diagrams
… partial ternary systems. No evidence of liquid immiscibility was found in any of these ternary systems. The experimental results obtained were in good agreement with computed features of the diagrams. However, pseudobinary systems were not found between Pb and the stable congruent melting …
-
The Role of Fluids in Geological Processes
… are interpreted as products of magmatic melt immiscibility. As such, the carbonate aggregates in Cretaceous lamprophyres from Hungary with similar petrographic characteristics have also generally been interpreted to be products of magmatic immiscibility. Petrographic and geochemic studies have …
-
Microstructural evolution of silicate immiscible liquids in solidifying ferrobasalts
Evidence of silicate liquid immiscibility in ferrobasalts is provided by co-existing Fe- and Si-rich melt inclusions and Fe-rich droplets dispersed in the Si-rich glassy mesostasis of rapidly cooled rocks. Crucially, the different physical properties of these unmixed liquids mean that they may …
-
Thermodynamics of geologic fluids
… was used to understand the role of fluid-phase immiscibility ("boiling") on quartz-fluid interactions, and to predict where in the system quartz could deposit and trap fluid inclusions. The spatial distribution of zones of quartz dissolution and precipitation is complex, owing to the many …
-
Irradiation-induced nanoclusters and their evolution in compound forming ni-base and cu-base alloys
… same strategy to the Cu-Nb-Si system, where the immiscibility between Cu and Nb is less strong than Cu-Mo, and the Nb forms various stable silicides with Si. Si-rich Nb-Si clusters were still induced by RT Kr irradiation despite the reduced immiscibility in the Cu-Nb system, The Si-rich Nb-Si …
-
Technical and economic feasibility of a high-temperature self-assembling battery
… components will self assemble due to their immiscibility and different densities. Another key feature is that a molten metalloid acts as the positive electrode, while an alkali or alkaline earth metal acts as the negative electrode, providing two electronically conductive molten electrodes. …
-
Heteroepitaxial Growth and Morphology of Thin Metal Films
… observed to form despite the well-established immiscibility of Cu and Co in the relevant temperature range ∼600°C. It is established in this study that the alloy forms during the epitaxial growth of Co on Cu by a surface pump mechanism that also creates remarkable microstructures in the …
-
Self-assembly of conformal polymer electrolyte film for lithium ion microbatteries
… LCO in hexane and hexadecane, chosen for their immiscibility in PEO. For better comparison, these experiments were repeated using water instead of PEO, for a total of four systems tested. This data allowed an estimate for the experimental surface energy components of LCO to be derived, resulting …
-
A Study of Petrography, Fluid Inclusions and Graphite Alteration of the Phoenix Uranium Deposit, Athabasca Basin, Northern Saskatchewan, Canada
… assemblages is interpreted to indicate fluid immiscibility and heterogeneous trapping. Microthermometric and cryogenic Raman spectroscopic analyses reveal that the highsalinity fluids in QBSN2, QBSN3 and QBSM4 belong to the H2O-NaCl-CaCl2 ± MgCl2 fluid system. The liquid-dominant inclusions in …
-
Physical and chemical aspects of fluid evolution in hydrothermal ore systems
… produced directly from a crystallizing melt and immiscibility is not necessary to produce the high salinities observed in some systems. Depending on the temperature, pressure, initial water content, and the extent of crystallization of the melt, the bulk salinity of the aqueous fluids exsolved …
-
Behaviour of Critical Metals During Smelting of Copper Concentrates from Olympic Dam Plant, South Australia
… REE in terrestrial melts. Predictions of REE immiscibility in Si-Fe-rich melt based on the presence of amorphous ‘monazite-like’ droplets within lanthanide-rich glasses is consistent with experiments showing that silicate and Fephosphate melt immiscibility promotes REE enrichment in Fe-rich …
-
Self-Organization of Dilute Copper Binary Alloys Under Ion Irradiations
… solute solubility. In Cu-Mo, the high level of immiscibility between the two elements leads to the formation of a nanocomposite that is kinetically stable under both temperature and irradiation.
-
Diblock carbon nanotubes compatibilized immiscible polymer blends
… the wide variety of plastics available, their immiscibility and the necessity to sort them, makes recycling an expensive process. To solve the problem, interfacial agents are used to improve the miscibility between different plastics. The present dissertation summarizes experiments conducted to …
-
Modeling and theoretical design methods for directed self-assembly of thin film block copolymer systems
… of their enthalpic interactions promoting immiscibility between the blocks and the bonding constraint through their chain topology. The morphologies formed can be tailored through a directed self-assembly (DSA) process using chemical or topographical templates to achieve a desired thin film …
-
Infululence of Polymer Nanoparticles on the Dewetting of Polymer Thin Films
… of nanoparticles to the Si surface is not due to immiscibility, or surface energy changes. The segregation of the star polymers at the polymer/Si interface is driven by both an attraction between star molecules and the Si/SiOx surface and possibly a relatively small enthalpic penalty resulting …
-
Growth and characterisation of Niobium/Gadolinium superconductor-ferromagnet nanocomposites
… 290 K in a form of a nanocomposite. The mutual immiscibility of these two elements gives us the opportunity to take advantage of both the superconduction and ferromagnetism properties of the constituents and further study the transport and magnetic behavior of the system and their effects on …
-
Petrogenesis of natrocarbonatite at Ol Doinyo Lengai, East Africa—evidence from Fe and U isotope variations
… how ODL natrocarbonatite forms. Liquid immiscibility is a favored hypothesis although condensate fluid separation is an alternative model. However, the exact mechanism that forms the ODL natrocarbonatite remains unresolved. We carried out Fe and U isotope analyses among a variety of ODL …
Page 1 of 3