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 20 of 116 for “"Heating rate"”.
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Effects of heating rate on the recrystallization kinetics of low-carbon sheet steels
Includes bibliographical references (pages 180-187).
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A Study of the Volatile Matter of Coal as a Function of the Heating Rate
… of volatile matter yields as a function of the heating rate was conducted. A suite of 21 coal and coke samples varying in rank from anthracitic to lignitic and heating rates from 10°C/min to about 450°C/min were used in the study. Heating rates up to 60°C per minute, which are typically used in …
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Effect of Heating Rate on Thermally Induced Pore Water Pressure and Crack Evolution in Clay and Shales
… shale samples, with a specific emphasis on how heating rates influence temperature distribution and the evolution of pore pressure under elevated temperatures. Clay shales, characterized by their extensive geological presence and low hydraulic conductivity, carry immense importance across a wide …
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Effects of temperature and heating rate on off-gas composition and pyrene removal from an artifically-contaminated soil
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1995.
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Effect of heating rate and microstructural scale on austenite formation, austenite homogenization, and as-quenched microstructure in three induction hardenable steels, The
Includes bibliographical references (pages 277-288).
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Effects of Surface Ion Milling on Ion Trap Heating
… coupled motional states is limited by an ion’s heating rate from one motional state to the next. An ion’s motional heating rate is proportional to the electric field noise experienced by the ion at the trap frequency. Measurements of ion heating rates are orders of magnitude larger than those …
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Investigation of the heating and curing rate of polymeric materials with thermal energy, continuous and pulsed microwave radiation
The purpose of this work was to study the heating and curing rate of polymers with continuous and pulsed microwave radiation and compare with conventional thermal energy. The heating rate of poly(ethylene glycol) and poly(propylene glycol) has been studied as a function of molecular weight with …
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Effects of Pressure on Coal Pyrolysis at High Heating Rates and Char Combustion
… project was to characterize high pressure, high heating rate coal pyrolysis and char combustion, with emphasis on improving coal/char high pressure combustion models. A flat-flame burner was used in a high pressure laminar flow facility to conduct high temperature, high heating rate pyrolysis and …
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Experiments towards mitigation of motional heating in trapped ion quantum information processing
… faced by trapped ions is an anomalous motional heating which limits the fidelity of two-qubit gates. It has been demonstrated that cleaning a gold trap chip via ion milling reduces the heating rate by two orders of magnitude [1]. However, it remains unclear why ion milling causes a much more …
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Investigating the loss of crystal structure in carbohydrate materials
Twenty-five carbohydrate type materials were screened using differential scanning calorimetry (DSC) to characterize the heating rate dependence of their melting temperature. Three heating rates were used: 1, 5 and 25°C/min. Based on previous research, it was hypothesized that if the material had …
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High Lundquist Number Simulations of Parker's Model of Coronal Heating: Scaling and Current Sheet Statistics Using Heterogeneous Computing Architectures
… one of the most discussed mechanisms for coronal heating and has generated much debate. We have recently obtained new scaling results for a 2D version of this problem suggesting that the heating rate becomes independent of resistivity in a statistical steady state [Ng and Bhattacharjee, Astrophys. …
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Characterization of aluminum powder ignition
Heating rate effect and particle size effect on ignition temperature of Al powder were studied to collect data for development of a possible Al powder ignition model. Aluminum ignition is associated with a highly accelerated burn rate and high combustion enthalpy. A new ignition model, which can …
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Fabrication and characterisation of Cobalt Chromium Molybdenum (CoCrMo) foams using slurry method
… which were 1000°C, 1100°C and 1200°C with heating rate of 1.5°C/min, 1.0°C/min and 0.5°C/min. Moreover, for the soaking time factor, the relevant durations were 60, 90 and 120 minutes. The parameter that influence in the result was the composition that were in porosity and bulk density …
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Foam replicated porous 316l stainless steel based on taguchi method for biomedical applications
… the sintering temperature, sintering time, heating rate and cooling rate. Scanning electron microscopy (SEM) was used to characterise the microstructure while a compression test was used to determine the mechanical properties of the samples. The physical properties including porosity and …
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Pyroelectric emission from PbZr20Ti80O3 emitter coupled on silicon heater
… silicon heater is designed for generating joule heating on heater regions using low dosage ion implantation, while bridging electric connection on leg areas from high doped silicon. Sharp nano-meter scale tip arrays are fabricated to concentrate electrons on surface asperity and reduce external …
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Production of a nanostructured copper by Spark Plasma Sintering
… and sintering mechanisms as well as that of heating rate and holding time on the structural evolution has been investigated. Particle rearrangement, local deformation, bulk deformation and sintering are the SPS mechanisms occurring successively during the sintering process of the atomized …
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Ultrafast Temperature Jump Study of Energy Transfer in Dye-Doped Polymer Films
… solid sample and the temperature is accurately measured. This technique, termed ultrafast optical calorimetry, permits the generation and measurement of molecular hot spots of several hundred degrees and bulk temperature jumps exceeding one hundred degrees at a heating rate of $10\sp $ …
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Computational Studies of Ohmic Heating in the Spheromak
… and utilized in an investigation of the ohmic heating of a spheromak plasma. The plasma density and composition, the applied magnetic field strength, the plasma size, and the plasma current density profile are considered for their effects on the spheromak heating rate and maximum achievable …
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Comparing the thermal decomposition kinetics of cane and beet sucrose to examine thermal behavior differences
… these experimental conditions, the predicted rate constant (k) and half-life (t1/2) values determined from nonisothermal experiments were compared to those obtained from isothermal experiments at 130°C. Based on the results of the isothermal experiments, the nonisothermal kinetic parameters …
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Microfabrication of surface electrode ion traps for quantum manipulation
… decoherence is dominated by the uncontrolled heating of ion motional states. In this thesis, we present the detailed microfabrication of several series of surface electrode linear Paul traps made from different electrode materials, followed by the ion motional heating experiment results for …
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