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Showing 1 to 20 of 406 for “"annealed"”.
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Simulation of annealed polyelectrolytes in poor solvents
… mit Gleichgewichtsladungsverteilung (annealed polyelectrolytes) genannt. Wegen des zusätzlichen Freiheitsgrades in der Ladungsverteilung werden eine Reihe ungewöhnlicher Eigenschaften theoretisch vorhergesagt. Mit Hilfe von Simulationen ist es zum ersten Mal gelungen, zu zeigen daß …
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Electrical Properties of Thallic-Oxide Single Crystals Annealed in Oxygen
Made available in DSpace on 2014-12-14T15:24:01Z (GMT). No. of bitstreams: 1 7804203.pdf: 3304886 bytes, checksum: 01ed1d53db2cfd31f7b0649f55d97a34 (MD5) Previous issue date: 1977
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Properties and Applications of Amorphous Gallium Arsenide Annealed to a Polycrystalline Form
… that is very arsenic rich. When this material is annealed at moderate temperatures (400 to 500°C) it becomes polycrystalline and in some cases very conductive (rho = single digit mO-cm). Several aspects of the annealing were explored and annealing time, temperature, ambient, and ramp rate were …
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The metallographic examination of cast, annealed, and age-hardened high-silicon monel metals
Thesis: B.S., Massachusetts Institute of Technology, Department of Metallurgy, 1940
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Explaining a Low-Temperature Magnetic Order in Annealed van der Waals Semiconductor CrSBr
… detection of a low-temperature magnetic order in annealed CrSBr bulk single crystals using SQUID magnetometry. The order manifests as a broad bump centered at 75 K in magnetization measurements. We deduce that the order is the magnetic contribution of secondary phases, which we image and identify …
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Nanoindentation of Annealed and As-Sputtered Thin Films of Nickel Titanium Shape Memory Alloys
The bottom-up processing techniques used for making Microelectromechanical systems (MEMS) devices can produce material properties different from bulk processing. The material properties must be evaluated with the process parameters used and for changes in the process parameters. The mechanical …
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Characterization of as-grown and annealed narrow band gap nitrides grown by molecular beam epitaxy
The application of narrow band gap nitrides to optoelectronic devices is a rapidly growing field, with the promise to supplant existing material systems used for optical fiber communications. While the field is relatively new, significant device advancements have occurred. These improvements have …
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A comparative test in annealed and spheroidized steels after quenching and tempering at different temperatures
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1924.
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Bioengineering Microporous Annealed Particle Scaffolds to Recruit Neural Progenitor Stem Cells and Promote Angiogenesis in the Stroke Core
… a biocompatible biomaterial from macroporous annealed particles (MAP) hydrogels for injection into the stroke core five days after a photothrombotic stroke. Our hyaluronic acid-based material has been modified to dictate NPC fate in vitro through maintained stemness and the formation of …
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Investigation of the stress corrosion cracking susceptibility of annealed and heat treated alloy 625 castings and forgings in sea water
Thesis: M.S., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 1987
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Urea Pre-treatment of N2-annealed Transition Metal Oxides for Low Cost and Efficient Counter Electrodes in Dye-sensitized Solar Cell
<p>Photovoltaic cells have shown great promise as an alternative to fossil fuel-based energy sources. Dye-sensitized solar cells (DSSCs) have shown potential as low-cost replacement to silicon solar cells owing to their reduced material costs and simple fabrication techniques. Platinum (Pt) was …
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Synthesis of zinc oxide nanorods: seed layer annealing effect on electrical conductivity
… time (6 hours) and temperature (90◦ C), on annealed (500 ◦C) and un annealed gold seed layers. The mean square roughness of annealed and un annealed seed layers are 6.711 and 8.839 nm respectively. The morphological study of the prepared ZnO nanorods revealed a clear improvement in …
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Effects of Thermal Treatments on Perfluorosulfonate Ionomer Membranes
Perfluorosulfonate ionomer (PFSI) membranes were annealed at elevated temperature for various periods of time in order to investigate the morphological effects of thermal treatments. For Nafion® 117, the DSC thermograms of Na+-, Cs+- and tetramethylammonium(TMA+)-form membranes show an endothermic …
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EFFECTS OF LASER MACHINING ON STRUCTURE AND FATIGUE OF 316LVM BIOMEDICAL WIRES
… Baseline fatigue data on 316LVM wires in the annealed and hard conditions revealed that the hard wires exhibited better high cycle fatigue behavior than exhibited by the annealed wires. However, the low cycle fatigue behavior of the annealed wires was better than that obtained on the hard …
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Evolution of microstructure and crystalline texture in aluminum sheet metal subjected to high strain rate biaxial deformation
… sheet metal workpieces at a high strain rate. Annealed and unannealed workpieces were formed. Specimens were taken from unformed metal and from the formed workpieces. Microstructures were examined with optical microscopy and pole figures were generated from X-ray diffraction data. …
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The effects of microstructure and nanostructure upon dynamic ductile fracture
… to control its microstructure, the copper was annealed to reduce the dislocation density, without altering its grain size. A novel method was developed to produce rings of pre-shocked material. The microstructures and quasi-static mechanical behaviour of all three states of copper (annealed, …
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Diffusion of hydrogen in metal membranes deformed in tension
… data. The bulk lattice diffusivity in annealed nickel at 22°C was found to be 3.24 X 1 cm2/sec while the bulk lattice diffusivity in annealed iron at 21°C was found to be 1.59 X 1”6 cm2/sec.
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