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Showing 1 to 20 of 34 for “"melt-spinning"”.
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Melt Spinning of the Fine PEEK Filaments
The production of fine filaments using the melt spinning process needs considerable effort. A thermoplastic melt is stretched from the spinneret under a constant take-up speed. The high performance thermoplastic PEEK is solidified in the melt spinning process in a small distance and short time. …
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An analysis of ferromagnetic shape memory alloys produced by melt spinning, sputtering and pulsed laser deposition.
… motion that is evident in single crystals.Melt spun ribbons are often highly textured and may offer a method of producing ribbons in a form useful as a start material for applications, i.e. basis of a useful ‘bulk’ compact form. Magnetic and structural properties of melt spun Ni-Mn-Ga have …
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The influence of heat transfer limitations on the properties of PET yarn produced by melt spinning
… A critical part of the production process is the spinning of the molten polymer into individual filaments which are brought together to form the filament bundle. During this process a quench air stream is blown across the filament bundle to aid in cooling the molten polymer. Here, heat transfer …
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A Microstructural Characterization of as-Cast and Rapidly Solidified Titanium-Silicon Alloys (Silicide, Melt-Spinning, Precipitation, Metastable, Oxygen)
… solidified material, namely laser surface melting and melt-spinning. Prior to RS, a careful microstructural characterization of the as-cast material was undertaken. This also involved a study of an homogenized and heat treated base alloy (Ti-2 wt%Si) to determine the types of precipitation …
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Heusler alloys – processing, characterization and study of physico-chemical properties
… con técnicas de enfriamiento ultrarrápido como “melt-spinning” o el método de Taylor-Ulitovsky. Por lo tanto, la parte experimental de la tesis se refiere a la preparación de aleaciones Heusler basadas en Co2 y Cu2Mn en forma de cinta por la técnica de melt-spinning. Gracias a la técnica de …
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A Microstructural Model for Flow -Induced Crystallization With Applications to the Simulation of Polymer Processes
… model can be used as an optimization tool for melt spinning, enabling prediction of the final fiber properties through the radial variation of the tensile stress and microstructure, as well as other polymer processes involving FIC.
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Elongational Flows in Polymer Processing
… is a main objective of the textile industry. Melt-spinning is a particularly simple and effective technique. In this work, we shall discuss the equations of melt-spinning in viscous and viscoelastic flow. These quasilinear hyperbolic equations model the uniaxial extension of a fluid thread …
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Microstructures and Properties of Rapidly Solidified Aluminum Alloys
… had been rapidly solidified by laser surface melting (LSM) or chill block melt spinning (CBMS). The alloys, all of which had the same solute content, had the composition Al-4.1Fe-0.6X (at.%), where X was Mo, Ce, Cr, V, or Zr. A binary Al-4.7Fe (at.%) was used for comparison.
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Dynamic Compaction of Rapidly Solidified Nickel-Base Superalloys (Rapid Solidification, Powder Metallurgy, Hot Isostatic Pressing, Consolidation, Precipitation)
… using centrifugal atomization, chill-block melt-spinning and laser surface melting. Transmission electron microscopy was utilized to characterize the various microstructures obtained in terms of growth morphology, segregation profiles, (gamma)' size and distribution of secondary hardening …
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Melt Processing of Metastable Acrylic Copolymer Carbon Precursors
… of engineering technologies that facilitate melt spinning of carbon fiber precursors in both an environmentally sound and cost effective manner. More specifically, methods were developed to avoid a degradative process in acrylonitrile copolymers (typically used in textiles and as carbon fiber …
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Aluminum Beryllium Composites Produced by Rapid Solidification (Metastable Equilibrium, Modulus Hardening, Liquid Immiscibility)
… 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 forms of Be were observed in these …
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Selective Laser Melting of Finemet Soft Magnetic Material
… the capability of replacing the traditional melt spinning process with decent bulk density and magnetic properties. Nanocrystalline materials originate from optimizing amorphous metallic alloys, resulting in low coercivity and high saturation magnetization by facilitating the formation of …
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Establishing the Conditions for Stable Extrusion of Melt Spun Polyacrylonitrile with Water Based Plasticizers
… fiber. Compared to the traditional solution spinning process, the melting spinning process of PAN is less costly and can further reduce the price of PAN fiber. This dissertation is concerned with the objective of establishment of conditions (temperature, plasticizer type, and plasticizer …
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Processing of composite fibers based on polypropylene and a thermotropic liquid crystalline polymer
… crystalline polymer (TLCP), in two novel fiber spinning processes. In one process, a single VB melt stream was surrounded by a sheath of PP in a manner comparable to a wire coating process just prior to melt spinning to generate fibers possessing a sheath-core structure. The other process …
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Characterization and modeling of nanocomposite thermoelectric materials system bismuth antimony telluride ((Biy̳Sb1̳-̳y̳)2̳Te3̳) as a function of temperature and magnetic field
… the weight % of the nanoinclusions prepared via melt spinning [1] in the sample. All the nanocomposite samples in this thesis are made solely for research uses and are purposely fabricated under conditions different than those used for the best samples previously reported [2, 1]. Although BC and …
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Rapid Solidification Processing of High Temperature and Reactive Alloys
… processes. Several unique configurations of melting and quenching have been evaluated. Induction, DC-arc and plasma have been considered for initial melting of these alloys. Centrifugal atomization and melt-spinning have been evaluated as means of rapid quenching. Several alloys of Ti and Nb …
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Desarrollo de composites magnetostrictivos de FeAl y FeGa para su aplicación en sensores de deformación
… of ribbons of the same composition obtained by melt spinning technique. The reason for using these ribbons is that, as indicated in the literature and as we have verified so, the Fe-Al ribbons obtained by melt spinning have a high magnetostriction. The first results we have obtained indicate …
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