7,608 Result(s)
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Article
Structure and Recalescence Behavior of Undercooled Nickel-Tin Alloys
Small nickel-tin alloy samples (3.2 g) were bulk undercooled in a Pyrex-brand borosilicate glass medium using a levitation melter. Recalescence was directly observed utilizing a rapid thermal measurement syste...
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Article
A Comparison of Thermal, Line-Source Electron Beam and CW Laser Annealing for the Fabrication of ErSi2 Schottky Barrier on Si
ErSi2 contacts formed by reacting Er with single crystal silicon using conventional furnace heat treatment are dominated by pits. Recently rapid electron and laser beam heating have been used to form pit-free ErS...
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The Measurement of Silicide Schottky Barrier Heights by Use of Photo-Voltaic Techniques
Schottky barrier structures often exhibit forward bias current voltage characteristics possessing a marked deviation from ideal behavior. In many cases, this deviation can be attributed to the influence of an ...
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Article
The Role of Phonon Dispersion in Controlling Atomic Rearrangement in Solid Solutions
The elastic energy of a solid solution of atoms of different sizes can be written as a Fourier sum with coefficients as a function of position in reciprocal space. Each coefficient is made up of three componen...
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Article
An investigation of the influence of cold-rolling on the structure factor of a metallic glass
The effects of cold-rolling on the atomic structure of a Fe40Ni40P14B6 commercial metallic glass (Metglas 2826) have been investigated by X-ray and neutron diffraction. The cold-rolling is seen to produce signifi...
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Article
The hydration of tricalcium silicate in the presence of colloidal silica
Reactions of colloidal silica fumes with calcium hydroxide or hydrating tricalcium silicate (C3S) have been studied using calorimetry, chemical analyses, and scanning electron microscopy. Silica fume reacts immed...
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Article
The hydration of tricalcium silicate in the presence of colloidal silica
Reactions of colloidal silica fumes with calcium hydroxide or hydrating tricalcium silicate (C3S) have been studied using calorimetry, chemical analyses, and scanning electron microscopy. Silica fume reacts immed...
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Article
Photodetector Arrays in Laser-Recrystallized Silicon Integrated with an Optical Waveguide
Integrated detection of light propagating in an optical waveguide by a photodetector array fabricated directly on the waveguide surface is demonstrated. Laser recrystallization of LPCVD polysilicon patterned w...
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Article
Fracture energy of Si3N4
The fracture energy of Si3N4 made by hot pressing, reaction sintering, and chemical vapour deposition (CVD) was studied. Extrapolation of fracture energies to zero additive or porosity levels, as well as analysis...
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Article
Electron Trap**/Detrap** in Thin SiO2 Under High Fields
A constant alternating current stressing technique is employed to study the electron trap** and detrap** characteristics within a layer of thin silicon dioxide (∼ 100 Å). A two-charge centroid model is pro...
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Article
Amorphous Silicon Ultra Thin Base Bipolar Phototransistor with High Performance (β = 12, τr ≤ 30μs)
An n+ /i/p /i/n+ amorphous silicon bipolar transistor has been successfully fabricated with a current gain of 12 and a response speed of 30 μS This new structure of bipolar transistor has a very thin base (200Å),...
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Article
Metal-Germanium Contacts and Germanide Formation
In this study, we survey germanide formation and characterize Schottky-barrier properties for a number of representative metals on Ge (Al, Ag, Au, Er, Ni, Pd, Pt, Ta and Ti). It is found that the germanide for...
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Article
Comparison of Structures of Gas Atomized and of Emulsified Highly Undercooled Ni-Sn Alloy Droplets
A comparison is made of microstructures of droplets of Ni-Sn alloys rapidly solidified (a) by gas atomization and (b) in a glass emulsifying medium. Cooling rate of the gas atomized particles ranged from 103 to 1...
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Article
Silicide-Silicon Interface States
The existence and nature of localized states at metal-semiconductor interfaces are long-standing scientific issues that have not been resolved. As device dimensions continue to shrink and packing density conti...
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Article
Study Of Nb/Si Multilayers
A systematic study of superconducting Tc, Hc and also the behavior of resistivity of Nb/Si multilayers is reported. Nb and Si layers with different thicknesses were deposited alternatively in an UHV two electr...
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Article
Determination of the activation energies for nucleation and growth of crystal nuclei in metallic glasses
A mathematical procedure is proposed in order to determine separately the activation energy for nucleation,E n, and for growth,E g, from isothermal crystallization experiments on metallic glasses. Differential sc...
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Article
Electrochemical corrosion of zinc in sodium chlorite
By means of electrochemical techniques, the corrosion of zinc and sodium chlorite deaerated aqueous solutions at room temperature was studied. An explanation for the formation of Zn(OH)2 is given based on various...
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Article
Determination of the activation energies for nucleation and growth of crystal nuclei in metallic glasses
A mathematical procedure is proposed in order to determine separately the activation energy for nucleation,E n, and for growth,E g, from isothermal crystallization experiments on metallic glasses. Differential sc...
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Article
Electrochemical corrosion of zinc in sodium chlorite
By means of electrochemical techniques, the corrosion of zinc and sodium chlorite deaerated aqueous solutions at room temperature was studied. An explanation for the formation of Zn(OH)2 is given based on various...
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Article
Solidification of Undercooled Ni-Sn Eutectic Alloy Under Microgravity Conditions in the Space
The Space Shuttle Columbia carried an Alloy Undercooling Experiment on its STS 61-C mission in January, 1986. The experiment was performed in the electromagnetic levitator (EML) designed and produced by the Ge...
