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 17 of 17 for “"Thermal Hysteresis"”.
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Ice control by antifreeze proteins: From interfacial thermodynamics, and engulfment resistance, to thermal hysteresis activity using theory and computation
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-08-01
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Elastic and inelastic X-ray scattering studies of the low dimensional spin-1/2 quantum magnet TiOCl
… quantified. The 65 K transition exhibits a thermal hysteresis, indicative of a first order phase transition. A detailed synchrotron x-ray study of the structure reveals the appearance of superlattice peaks at ( ... ) below 65 K. The intensity of the peaks drop very sharply above T, and a …
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Towards Crack-Resistant Polycrystalline Zirconia Shape-Memory Ceramics with Low Hysteresis
… and ii) the transformation exhibits a large hysteresis of over 150 K. It is yet unknown what drives these phenomena and how they can be avoided. In this thesis, these phenomena are systematically investigated in a series of ceriadoped zirconia compositions. Using in situ X-ray diffraction, …
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Electrically induced antiferroelectric-ferroelectric phase transformations in lead-zirconate titanate stannate ceramics
… microstructure. Emphasis is placed on (i) the thermal stability of the AFE-FE transformation, including thermal hysteresis, (ii) microstructure-property relations, and (iii) electromechanical response of the field-induced transformation behavior for actuator applications. A thermodynamic model …
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A Conservation Study of the Naulakha Pavilion at Lahore Fort, Pakistan
… severe stress and destructive weathering due to thermal hysteresis in the presence of heat and moisture. So far, no comprehensive documentation of the monument’s construction, previous interventions, or its current conditions exists. This work addresses the digital documentation of existing …
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Ligand design for molecule-based magnetic and/or conducting materials
… spin crossover in the solid state with no thermal hysteresis. Variable temperature X-ray diffraction studies on single crystals of VII reveal interesting structural changes in the coordination geometry of the macrocycle accompanying its SCO transition. The second project reports the …
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Ultrasonic Pyrometer for Industrial Applications
… suited for ceramic sensors which have poor thermal shock-resistance, User tests on a nuclear reactor, a jet engine and in molten lead established the practicality of these probes, A literature study of melting point, elastic constant, internal friction and thermal shock-resistance, the most …
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Behavioral freeze avoidance in an Antarctic fish
… the Ross Sea) lacked measurable AFGP activity or thermal hysteresis (TH). How it survives in the ice-covered Southern Ocean is unclear. Analyses of the sera of L. squamifrons from the West Antarctic Peninsula (WAP) confirmed that TH was indeed minimal or absent. The sera osmolality was 429 ± 19 …
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Topological Structures in Ferroic Materials
… interference (SQUID) were used to measure hysteresis loops from films of different composition as well as the variation of the magnetisation in the samples with applied temperature and field. These results enabled the determination of the Curie temperature, which was found to vary …
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Developing a new interatomic potential and atomistic study of NiTiHf
… temperatures, lower preparation cost and good thermal stability. However, until today, most studies conducted on NiTiHf have focused on a limited range of compositions due to the difficulties and high cost of the experimental studies. Therefore, there exists a lack of comprehensive research on …
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Thermodynamic modeling of martensitic transformations in shape memory alloys.
… strain tensor and captures the latent heat and thermal hysteresis to within an order of magnitude. The second part of this work consists of developing a lattice dynamics model to simulate the MTs. The atomic interactions are modeled using temperature independent Morse pair potentials. The …
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The Solid State Ferric Spin-Crossover Transition: Spectroscopic, Magnetic, and Structural Investigations (Moessbauer, Epr, High, Low)
… may influence the bulk thermodynamics of the thermal low-spin-high-spin transformation and the kinetics of the intramolecular spin-state interconversion. The sample Fe(3-OEtSalBzen)(,2) BH(,4)(.)CH(,3)CN, where 3-OEtSalBzen is the monoanion of the Schiff-base condensate of …
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Application of Chemical Looping for Solar Thermal Energy Storage
In the recent years, Thermal Energy Storage (TES) systems have received significant attention because they can offer a low-cost Concentrating Solar Power (CSP) plant. Moreover, TES systems increase the economic viability of CSP plant for dispatchable power production over other renewable energy …
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Size Effects in Shape Memory Ceramics
… quality and ultimately increased the number of thermally induced martensitic transformation cycles from 5 in bulk materials out to at least 125. The tetragonal-to-monoclinic transformation behavior of yttria-doped zirconia in polycrystalline and single crystalline forms were compared over many …
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Free self-assembly of spontaneously chiral, supramolecular structures
… before aggregation takes place. As a result, the thermal hysteresis of the formed fibres extends to 10-20% of their formation temperatures. The kinetic barriers to the early stages of growth are investigated by the introduction of a small permanent seed. Depending on the size of the seed, …
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Evolution of the structure and properties of thermomechanically-processed metallic glasses
… of structures and properties depending on their thermal and processing histories. Increasing the MGs’ enthalpies through thermomechanical processing, a process typically termed rejuvenation, can provide large improvements in mechanical properties. Plastic-deformation processes induce large …
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Design and Analysis of Biomimetic Medusa Robots
… austentite phase transition temperature and ii) thermal hysteresis. Ideally, one would like to reduce both these quantities and for this purpose an equiatomic Ni-Ti alloy was modified with Cu. Replacing nickel with 10 at% copper reduces the thermal hysteresis by 50% or more. For Ni-Ti alloys with …