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Showing 1 to 20 of 404 for “"MELTS"”.
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Desulphurisation of iron-carbon melts.
Desulphurisation of iron-carbon melts by CaO-FeO-SiO2 slags (Fayalite to 38 mass % CaO-Fayalite) at 1300 C has been investigated under conditions similar to those encountered in LD steelmaking practice. Techniques were developed to introduce a single metal droplet into a liquid slag contained in an …
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Lubrication Forces in Polydimethylsiloxane (PDMS) Melts
… flow properties of polydimethylsiloxane (PDMS) melts at room temperature were studied by measurement of lubrication forces using an Atomic Force Microscopy (AFM) colloidal force probe. A glass probe was driven toward a glass plate at piezo drive rates in the range of 12 – 120 μm/s, which …
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Characterization of Carbonaceous Exsolvate from Metal Melts
This study seeks to explore the role of carbon meso-structures in the strengthening of steel by characterizing the carbonaceous exsolvate from a metal-carbon melt. Metal-carbon matrix composites, such as the material used in this investigation, are commonly employed to strengthen tool steel. …
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Rheology and Microstructure of Filled Polymer Melts
… of particle dispersion in polymer nanocomposite melts are studied through rheological characterization of nanocomposite melt mechanical properties and small angle X-ray scattering measurement of the particle microstructure. The particle microstructure probed with scattering is related to bulk …
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Crystallization Kinetics in Binary Borate Glass Melts
Made available in DSpace on 2014-12-12T00:32:34Z (GMT). No. of bitstreams: 1 7317608.pdf: 7261532 bytes, checksum: a7ac8ba506e0eb918ae19d2398bfebbc (MD5) Previous issue date: 1973
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The dissolution of lime in iron silicate melts.
… made of the dissolution of lime in iron silicate melts. The experiments were carried out under an inert atmosphere of argon at 1300°C in a vertical tube furnace. A small cylindrical pellet of lime was preheated to the melt temperature before being immersed in the melt contained in an iron …
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Crystallization kinetics of polymer melts in extensional flow
A technique to study the kinetics of flow-induced crystallization of polymers in extensional flow has been developed which uses a 4-Roll Mill. The kinetics of a High Density Polyethylene were found to be well described by the Avrami treatment, indicated that the crystallization occurred by sporadic …
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Petrology and geochemistry of high degree mantle melts
… the petrogenesis of high degree, hydrous melts of the mantle, with particular focus on komatiites from the Barberton Mountainland, South Africa. Chapter 1 presents experiments on a Barberton komatiite composition under anhydrous and H20 saturated conditions. A comparison of the …
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Molecular simulation of nucleation from flowing polymer melts
During processing, flow drastically accelerates the kinetics of polymer crystallization, altering the morphology and properties of the resulting material The earliest stage of flow-induced crystallization, known as flow-enhanced nucleation (FEN), is challenging to study experimentally due to the …
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Electromagnetic stirring of metallic melts : theory and experiments
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1991.
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Reactions between refactories and steel melts under reduced pressure.
Abstract not available.
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Nanoparticle assembly in polymer thin films and polymer melts
Thesis (Ph. D.)--Michigan State University. Materials Science and Engineering, 2010
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The Transient Flow Rheology and Instabilities of Polyethylene Melts
The extrusion of polymers such as polyethylenes can be inhibited by melt flow instabilities, which differ in nature from one type of polyethylene to the other. In this thesis, the rheology and flow of three polyethylenes, each having a distinct molecular structure is studied. These polyethylenes …
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The Transient Flow Rheology and Instabilities of Polyethylene Melts
The extrusion of polymers such as polyethylenes can be inhibited by melt flow instabilities, which differ in nature from one type of polyethylene to the other. In this thesis, the rheology and flow of three polyethylenes, each having a distinct molecular structure is studied. These polyethylenes …
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Constitutive modelling of branched polymer melts in non-linear response
… with modelling long chain branched polymer melts using the McLeish and Larson Pompom constitutive equations. Usually the non-linear terms in this model are fitted to uniaxial extensional data due its sensitivity to levels of branching, but in this thesis I will study a number of other …
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Ft-Ir Study of the Dynamics of Entangled Polymer Melts
The dynamics of entangled polymer melts have been examined using polarized Fourier-Transform infrared (FT-IR) spectroscopy. Based on the reptation model, the motion of a chain in the presence of topological entanglements is that of a one dimensional random walk along the chain contour. This motion …
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A study of transient flow-induced crystallization of polymer melts
Flow-induced crystallization of several polymer systems has been studied using a four-roll mill device, coupled with optical polarimetry, to provide an in-situ technique for monitoring the transformation kinetics both during and following flow. The use of a crystallizable droplet phase, suspended …
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Molecular simulation of crystal growth in alkane and polyethylene melts
Molecular simulation has become a very powerful tool for understanding the process of polymer crystallization. By using carefully constructed simulations, one can independently observe the two phenomena responsible for melt crystallization: nucleation and growth. This research focuses on modeling …
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Methodology for determining electronic transference numbers in molten sulfide melts
Electrolysis of molten copper (I) sulfide (Cu2S) in a sulfide-based electrolyte is being investigated for use as a direct path for copper extraction to replace the conventional process of smelting and electrorefining [1]. The allure of an electrolysis process for metals extraction can be enhanced …
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