1,825 Result(s)
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Article
The Influence of Pore-Structure on the Compressive Strength of Hardened Cement Paste
The pore-structure strongly influences the compressive strength of hardened cement paste (hcp) and other porous materials, as well as other mechanical properties. The simplest but most currently used expressio...
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Article
Exafs Analysis of Ionomers
Extended x-ray absorption fine structure (EXAFS) spectroscopy has beensuccessfully applied to the analysis of the ionic domain microstructure inzinc and rubidium neutralized ionomers. In dehydrated zinc neutra...
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Article
Ion-Beam Mixing and Amorphization in Au/Zr Bilayers
Au/Zr bilayer films with inert-gas markers were produced by low energy (< 4 keV) implantation. Mass transport was measured during ion-beam mixing with 1 MeV Kr at several temperatures between 330 and 540K. Two...
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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 percolation networks in ion-irradiated Ag–Co solid films
Percolation networks were observed in an immiscible Ag–Co alloy system after the Ag30Co70 alloy films were irradiated to a dose of 1 × 1016 Xe+/cm2 with 200 Kev Xe+ at room temperature. Fractal dimension D as wel...
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Article
Solid-state amorphization, interdiffusion, and ion-beam mixing in Au/Zr and Ni/Zr
Inert-gas markers, Rutherford backscattering, and x-ray diffraction were used to investigate solid-state interdiffusion in Ni/Zr and Au/Zr bilayer films as a function of temperature; microstructural studies du...
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Article
Ion Beam Method to Study Fractal Aggregation of Magnetic Particles on Thin Solid Films:
This paper presents the experimental observations of Fractal Aggregates on thin solid films after either directly thin film deposition or additional ion irradiation. A linear correlation was found between the ...
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Article
Investigation of the Interface Integrity of the Thermally Stable Wn/GaAs Schottky Contacts
WNx,/GaAs Schottky contacts formed by reactive sputtering were found to be thermally stable up to an annealing temprature of ∼9400°C. The interface morphology and structure of this contact under high temperature ...
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Article
Silicophosphate-containing quartz ceramics
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Article
Preparation of silica glass microspheres by sol-gel processing
A method for making glass microspheres by the sol-gel process has been developed. Porous silica microspheres were produced at temperatures as low as 500 °C and densified silica microspheres were prepared at 80...
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Article
Metastable Phase Formation in the Y-TI System by Ion Mixing
Amorphization behavior was studied for the Y-Ti system, which has rather positive heat of formation being around + 22 kJ/mol, by room temperature 360 keV xenon ion mixing of YxTi100-xmultilayered films to various...
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Article
Al-Yb Amorphous Alloys Produced by Ion Mixing or Solid State Reaction
We report, in this paper, three different ways of producing amorphous alloys in the Al-Yb system, (i) Al80Yb20multilayered films were readily amorphized by 180 keV xenon ion mixing at room temperature(RT) to a do...
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Article
Defect States in Hydrogenated Amorphous Silicon-Sulphur Alloys by ESR and PAS
We have presented ESR and PAS measurements for a series of a-SiS:H and a-Si: H films deposited by glow discharge at different parameters. The spin density in a-SiS:H alloys measured by ESR is essentially indep...
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Article
Irradiation Effect of Slow Neutrons on Mechanical Behaviour Related to Flux Pinning In YBa2Cu3Oy
Internal friction and modulus in YBa2Cu3Oy, which are related to flux pinning, were examined by means of the vibrating reed technique before and after the slow neutron irradiation to different fluences. Both the ...
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Article
Sol-Gel and RF Sputtering Thin Film Coatings for Fiber Optic Sensor Applications
Thin film coating techniques appear to have many advantages over other techniques for immobilization and incorporation of chemical indicators to optical waveguides in develo** dye based fiber optic chemical ...
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Article
Characterization of A-Si: H and A-SiGe: H Films in Liquid Crystal Light Valve
A-Si: H and a-Si: H/a-SiGe: H heterojunctions have been prepared as the photoconductors in the liquid crystal light valves. The impedance matching conditions of the a-Si: H and the heterojunction in the valves...
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Article
Molecular Beam Epitaxy of Znl−x Cdx Se/ZnSe Heterostructures And Their Optical Properties
Superlattices and quantum wells of Znl−xCdxSe/ZnSe, and heterostructures based on ZnSe/CdSe digital alloys have been grown by molecular beam epitaxy (MBE). Their optical properties were studied with particular em...
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Article
Deformation behaviour in α/β two-phase super-plastic brass
α/β brass consists of hard α and soft β phase in its superplastic temperature range. Because of the difference between their mechanical properties, the superplastic behaviour of the alloy differs from that of ...
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Article
Deformation behaviour in α/β two-phase super-plastic brass
α/β brass consists of hard α and soft β phase in its superplastic temperature range. Because of the difference between their mechanical properties, the superplastic behaviour of the alloy differs from that of ...
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Article
SEM examination of the oxide-metal interface formed during the aqueous corrosion of a Zr-2.5 wt% Nb alloy
The oxide-metal interface formed during the aqueous corrosion of a Zr-2.5 wt% Nb alloy has been studied by SEM, using a specimen preparation method which also has potential application to other materials conta...
