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Showing 1 to 12 of 12 for “"Ion beam mixing"”.
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Ion Beam Mixing of Metal/Fluoropolymer Interfaces
The adhesion of metals to polymers depends on the structure at the interface. In this work, we study the "mixing' effect of 50 keV nitrogen implanted thin metal layers on Teflon PTFE (polytetrafluoroethylene). RBS analysis shows that thin layers copper and chromium approximately 300-400 Å thick …
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Ion beam mixing of Mo/Al bilayer samples and thermal spike effects
… after first being irradiated with Xe ion beam having an energy of 1.8 MeV. The computer code RUMP was then used to simulate the RBS spectra. The interdiffusion at the interface was considered in terms of thermal spike induced atomic migration. It was found that the coupling of the …
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Metalorganic chemical vapor deposition, ion beam mixing, and selective epitaxy of III-V semiconductors
Metalorganic Chemical Vapor Deposition (MOCVD) is a versatile growth technique commonly used to grow III-V compound semiconductor materials. A review of many seminal studies investigating the growth mechanisms of GaAs epitaxial growth is presented. Carbon is an intrinsic impurity in GaAs and AlGaAs …
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Phase and Microstructural Stability in Immiscible Binary Alloys Under Irradiation
… 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, phase separation takes place …
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Third Harmonic Generation as a Probe of Ultrafast Phase Transitions
… are initial efforts to measure the solidification rate of metal samples using linear methods, including the design and operation of a deferential photo detector as well as the first quantitative measurements of the thermal conductance of metal-metal interfaces. The room temperature interface …
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Preparation and characterization of Mo/Al layered thin films
The fabrication of bilayer and multilayer Mo/Al thin films using a conventional multi-target rf-diode sputter deposition system was studied. The films were deposited on glass and Si( 100) substrates. The as-deposited films were characterized with respect to their structure and composition profiles …
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The Electrical Properties And Microstructure Of An Ion Beam Mixed Metal-Polymer System
Ion beam mixing of the surface of polymers with metal films is done by ion implanting through a thin metal film. The metal layers are evaporated on the polymer substrate surface before ion implementation. A 50keV, nitrogen ion beam with a dose in the range of 10¹⁶ ions/cm² and a dose rate current …
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Radiation-Enhanced Diffusion and Defect Production During Ion Irradiation of MgO and Al(2)O(3)
Radiation enhanced diffusion of O$\sp{18}$, Ca and Zn buried tracer layers in MBE grown MgO was measured following irradiation with either 2.0 MeV Kr or 1.0 MeV Ne, He or H from 30 to 1500$\sp\circ$C. This represents the first reported RED measurements on an oxide system. Ion beam mixing at …
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Low Energy Ion Beam Synthesis of Si Nanocrystals for Nonvolatile Memories - Modeling and Process Simulations
… in the gate oxide are known to improve conventional floating gate flash memories. Data retention, program and erase speeds as well as the memory operation voltages can be substantially improved due to the discrete charge storage in the isolated Si NCs. Using ion beam synthesis, Si NCs can be …
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Computer simulation of high fluence ion beam surface modification processes
Various processes that participate in ion beam surface modification are studied using phenomenological, analytical and first principle models. The processes that are modelled phenomenologically include preferential sputtering, radiation-damage induced migration and second phase precipitation. The …
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Atomistic simulations of driven alloys: a study of effective temperature models for low and high temperature applications
Immiscible alloys under severe plastic deformation (SPD) or irradiation form non-equilibrium microstructures at steady-state with microstructural features of a characteristic length scale that are stable over prolonged processing times. Such alloys have been termed ‘driven alloys’ as these …