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Showing 1 to 20 of 35 for “"binary alloys"”.
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Numerical simulation of dendritic growth of binary alloys
… for simulation of dendritic solidification of binary alloys is developed. The model solves the coupled time-dependent temperature and solute concentration equations on two independent meshes: a fixed mesh for the temperature and an adaptive interface-conforming mesh for the concentration. The …
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Self-Organization of Dilute Copper Binary Alloys Under Ion Irradiations
… the microstructural evolution of irradiated alloys is controlled by complex kinetic processes. The work presented here examines the effect that 1.8 MeV Kr+ ion irradiation have on model alloy systems, dilute Cu-Ag, Cu-Nb, Cu-Mo and Cu-Fe alloys, and compares their behaviors with existing …
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Phase and Microstructural Stability in Immiscible Binary Alloys Under Irradiation
In the experimental part, we investigate the microstructures resulting under ion-beam mixing in Ag-Cu multilayers. We find that, regardless of the irradiation temperature, extensive grain growth takes place. In the regime when thermal decomposition is in dynamic balance with irradiation mixing, …
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Low Temperature Specific Heat of Binary Alloys of Transition-Elements
Made available in DSpace on 2014-12-04T23:26:51Z (GMT). No. of bitstreams: 1 6206148.pdf: 3646952 bytes, checksum: 2f539d66e4f6a7dc3be22525e52ffcf0 (MD5) Previous issue date: 1962
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Low Temperature Specific Heats of Some Binary Alloys of Transition-Metals
Made available in DSpace on 2014-12-04T23:26:46Z (GMT). No. of bitstreams: 1 5902012.pdf: 2982948 bytes, checksum: 7e9cbbf6c1602bf634d8072e31899490 (MD5) Previous issue date: 1959
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Dynamic analysis of transport phenomena in directional solidificationn [sic] of binary alloys
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1990.
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Thermosolutal convection in directional solidification of dilute and non-dilute binary alloys
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1986.
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High-throughput synthesis and screening of binary alloys for hydrogen evolution and oxidation reactions
… equilibrated (annealed at 300 ºC for 15 minutes) binary metal alloys for the hydrogen evolution reaction (HER) and the hydrogen oxidation reaction (HOR). Results are presented for the Pd-Au, Pd-Bi and Ru-Au alloy systems. Thin films of each alloy system were synthesized on a series of 10x10 array …
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Disorder and nanopatterning in ordered binary alloys: in situ ion irradiation and kinetic Monte Carlo simulation
… ordered microstructures of real and simulated binary alloys. The behavior of Cu3Au, an alloy with L12 chemical order, is investigated experimentally through in situ electron diffraction and dark-field transmission electron microscopy. Under irradiation with 500 keV Ne+ ions, our diffraction …
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Effects of Implanted Solutes and Heavy -Ion Cascades on the Kinetics of Radiation -Induced Segregation in Binary Alloys
… segregation (RIS) in Ni-9at.%Al and Cu-1at.%Au alloys. To study the effect of solute implantation on RIS, the segregation rate of Al atoms in Ni-9at.%Al following the implantation of Ne, Sc, or Zr was quantified using in-situ measurements of the growth rate of gamma '-Ni3Al precipitate zones …
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Synthesis and Characterization of Titanium Zirconium Based Alloys for Capacitor Use
This work seeks to characterize a series of Ti-Zr binary alloys and a ternary Ti-Zr-Be alloy as anode materials for electrolytic capacitors. Specifically, this work attempts to improve the electrical behavior by reducing leakage through anodically grown oxide film on binary alloys via …
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Palladium, yttrium, copper ternary alloys for hydrogen purification
… Alloying with different metals to produce binary alloys has been shown to further improve many of its essential properties significantly. Currently palladium-silver alloys are used commercially for the hydrogen purification process, however, other binary alloys have also been shown to …
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Development of an on-demand beam pulsing system for Pixe-analysis of thick targets
… the intensity ratios from a number of standard binary alloys during the experimental work. A computer programme has been developed to evaluate the calculations of the X-ray yields from thick targets bornbarded by protons, taking into account the secondary X-ray yield production due to …
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The magnetic properties of chromium-vandium alloys
Samples of the binary alloys of chromium and vanadium were made using both induction furnace and a standard tube furnace. These samples were used to study the magnetic properties of these alloys. The Ne'el temperature was measured for the dilute solutions of Vanadium and the magnetic susceptibility …
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First-principles approach to screening multi-component metal alloys for hydrogen purification membranes
… operational standards, and be cost effective. Alloys offer an alternate route in improving upon membranes based on pure metal such as Pd. Development of new membranes is hampered by the large effort and time required not only to experimentally develop these membranes but also to properly test …
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Compositional modifications in alloys under irradiation
… the surface and subsurface compositions of alloys during irradiation has been investigated theoretically using a phenomenological model that includes preferential sputtering, displacement mixing, radiation-enhanced diffusion, radiation-induced segregation and Gibbsian adsorption. Sample …
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Formation of Ti₃Al and its embrittling effects on titanium-aluminum alloys
… characteristics have been investigated in Ti-Al binary alloys up to 9.0 weight percent aluminum. The investigating tools were optical metallography, the Brown-type stress corrosion test and the Charpy V-notch Impact test. Segregated microstructures resulting from annealing in the (α+β) region …
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Far infrared absorption in superconducting niobium alloys
… energy gaps in bulk samples of transition metal binary alloys of the system Zr - Nb - Mo have been measured by the absorption of far-infrared radiation. The gap edges are sharp and there is no notable structure on the curves. No ,attempt was made to compare the shapes of the curves with theory, …
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