9,040 Result(s)
within
Yu** Zhou
Characterization and Evaluation of Materials
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Article
Observations of the effects of temperature and crystallographic orientation on surface segregation in an Fe-Si-Sn-C alloy
Auger electron spectroscopy was used to study segregation of Group IVB solutes to the surfaces of individual grains of a poly crystalline Fe-3.1 pct Si-0.06 pct Sn-0.004 pct C alloy heated in UHV. As the tempe...
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Article
Preparation and analysis of high-T c Nb-Ge films
The dependence of Tc on sputtering conditions, chemical composition, and phase structure for Nb-Ge films has been studied. It was found that Tc varied with composition, but was not dependent on exact stoichiometr...
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Article
Assessment of persistent-photoconductivity centers in MBE grown Al x Ga1-x as using capacitance spectroscopy measurements
Deep-level transient spectroscopy and thermally stimulated capacitance measurements were used to investigate the properties of deep traps in Si-dopedn-Al x Ga1−xAl layers grown b...
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Article
Picosecond Laser-Induced Surface Transformations in Solids
We report the results of a study of surface transformations in semiconductors (Si, GaAs) and metals (Cu) produced by 100 ps long pulses from a Nd:YAG laser system. We present and outline the conclusions of our...
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Article
Elastic analysis of torsion crack problems of a bar with ring segment sections
Torsion crack problems of a bar with ring segment sections are discussed (see Figs. 1–2). The procedure utilized consists of the following three steps: (1) using the conformal map** technique, (2) using the ...
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Article
Reducing crack problem of a circular plate or an infinite plate containing a circular hole into fredholm integral equation
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Article
Influence of alloy composition, substrate temperature, and do** concentration on electrical properties of Si-doped n-Alx Ga1−x As grown by molecular beam epitaxy
Capacitance and Hall effect measurements in the temperature range 10-300 K were performed to evaluate the deep and shallow level characteristics of Si-doped n-AlxGa-xAs layers with 0 × 0.4 grown by molecular beam...
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Article
Study of the formation, crystallization and electrical properties of Pd(0.83−x)XxSi0.17 (X=Fe, Co, Ni;x=0.05, 0.10, 0.15) metallic glasses
The substitution of Fe, Co, and Ni (upto 15 at. %) for Pd in Pd-Si metallic glasses raises the crystallization temperature and stability in the order of Fe, Co, and Ni as checked by resistivity and DTA techniq...
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Chapter
A Problem of the Heat Conduction Equation with a Moving Boundary in Three-Dimensional Space, E3
It is well known that a parabolic partial differential equation for the case of a moving boundary can describe some moving-boundary problems in different fields of science and technology. In this paper, we giv...
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Article
Structural and electrical properties of plasma-deposited silicon nitride from SiH4-N2 gas mixture
Plasma-deposited silicon nitride films were produced from SiH4-N2 gas mixture. Their composition, chemical bonds, and electrical properties were investigated by varying the deposition conditions. The silicon nitr...
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Article
A Novel Silicided Shallow Junction Technology for CMOS VLSI
A novel technique for the fabrication of shallow, silicided p+-n junctions with excellent electrical characteristics has been developed. The technique utilizes the ion implantation of dopants into silicide layers...
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Article
Optical Modulation Spectroscopy of a-Si:H Based Multilayer Structures
Steady state optical modulation spectrum of a-Si:H/a-SiNx:H multilayer structure, its temperature dependence and time decay have been studied. For multilayers with very thin sublayers the onset of the spectrum is...
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Chapter and Conference Paper
The Miniature Neutron Source Reactor (MNSR) a Private Nuclear Tool
In view of the problems faced by large and medium research reactors, we have developed and constructed the prototype of Miniature Neutron Source Reactor in 1984. During 2 years operation, the MNSR has demonstr...
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Article
Mössbauer study on surface magnetic properties in magnetic fluids
The presence of Δm=0 lines of the Mössbauer spectra of small Fe3O4 particles coated with an organic surfactant in an applied field of 7 T at 5 K shows a non-collinear magnetic structure in the surface layer of th...
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Chapter
Experiments on Heavy Electron and High Tc Oxide Superconductors
Two classes of superconducting materials, heavy electron superconductors (frequently referred to as “heavy fermion superconductors”)1,2 and superconducting oxides, 3 have attracted a considerable amount of attent...
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Article
Minority carrier diffusion lengths in bulkn-type gaas
Minority carrier hole diffusion lengths in as-grown and Ni- or Cu-diffused bulkn-GaAs, both LEC and HB, having carrier concentrations in the range 1016-1017cm−3 have been studied by surface photovoltage methods a...
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Article
Study of improving the hot-cracking susceptibility of the nickel-iron electrode for welding cast iron
The nickel-iron electrode for welding cast iron is susceptible to hot cracking. In order to improve its hot-cracking susceptibility, the effects of rare earth (RE), C, Si, Cu, Mn, S, and P on its hot cracking ...
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Article
A Comparative Experimental Study of Glass Stability in Seawater and Distilled Water
Both PNL76−68 and ABS-118 glasses show greater stability in seawater (SW) than in distilled and deionized water (DDW), in the MCC-1 90°C corrosion test. After 180 days of corrosion, the boron release from PNL7...
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Article
Laser-Initiated Aluminothermic Reaction Applied to Preparing Mo-Si Film on Silicon Substrates
Mo-Si films on silicon substrates has been prepared by the CO2 laser-initiated aluminothermic reaction. The features of these films have been characterized by RBS, AES, etc. The formation mechanism is discussed.
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Article
Formation of Buried Oxide in Mev Oxygen Implanted Silicon
We have studied the formation of buried oxide in MeV oxygen implanted Si. A continuous oxide layer is formed in the samples implanted with 2x1018/cm2 oxygen and annealed at 1300° C. The microstructures are studie...
