Results 301 to 310 of about 2,901,641 (329)
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1994
Abstract The first questions to be asked about a surface are: what atoms are present and what are their concentrations? If techniques can be found to provide the answers to these questions, then the next, more detailed, question is: how are the atoms bound to each other? These are the questions of surface chemistry.
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Abstract The first questions to be asked about a surface are: what atoms are present and what are their concentrations? If techniques can be found to provide the answers to these questions, then the next, more detailed, question is: how are the atoms bound to each other? These are the questions of surface chemistry.
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Progress in Surface Science, 1981
Abstract The practical importance of alloy surfaces in catalysis, corrosion andother aspects of materials performance is widely recognized. What is needed now is sufficient knowledge of the relationship between externally controllable factors — alloy composition, temperature, environment — and surface properties — composition, structure, chemical ...
M.J. Kelley, V. Ponec
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Abstract The practical importance of alloy surfaces in catalysis, corrosion andother aspects of materials performance is widely recognized. What is needed now is sufficient knowledge of the relationship between externally controllable factors — alloy composition, temperature, environment — and surface properties — composition, structure, chemical ...
M.J. Kelley, V. Ponec
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Surface Composition as Bridging
Journal of Semantics, 2001The development of explicit theories of dynamic context change has led to a fundamentally new perspective on the interpretation of discourse. In this paper I show that this development also opens up the possibility of approaching subclausal composition along similar lines.
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Composites with Hydrophobic Surfaces
Fibre Chemistry, 2015Methods for depositing fluoropolymer coatings onto the surfaces of carbon-fiber materials were examined. The water repellants were fluoroplastics F-2M and F-4D, use of which could more than double the hydrophobicity of the fibrous materials. It was shown that the fluoroplastic coatings had high chemical resistance.
O. I. Gladunova +3 more
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Composition of Titan's Surface
2009The Huygens Probe returned the first in situ data on Titan's surface composition in January 2005. Although Huygens landed on a dry plain, the Gas Chromatograph Mass Spectrometer (GCMS) showed evidence of methane moisture in the near subsurface suggesting methane precipitation at some time in the past.
L. A. Soderblom +7 more
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ZnSe(100) surface: Atomic configurations, composition, and surface dipole
Physical Review B, 1994Chemical composition, core-level line shape, and electron affinity measurements are performed on the Se-terminated (2\ifmmode\times\else\texttimes\fi{}1) and Zn-terminated c(2\ifmmode\times\else\texttimes\fi{}2) ZnSe(100) surfaces. The (2\ifmmode\times\else\texttimes\fi{}1) reconstruction corresponds to a complete monolayer of Se dimers with one filled
, Chen +6 more
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Applied Surface Science, 1984
Abstract In equilibrium, the composition of the surface of an alloy will, in general, differ from that of the bulk. The broken-bond model is applicable to alloys with atoms of virtually equal size. If the heat of alloy formation is zero, the component of lower heat of atomization is found enriched in the surface.
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Abstract In equilibrium, the composition of the surface of an alloy will, in general, differ from that of the bulk. The broken-bond model is applicable to alloys with atoms of virtually equal size. If the heat of alloy formation is zero, the component of lower heat of atomization is found enriched in the surface.
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Surface metal matrix composites
Materials & Design, 2001Abstract This investigation has presented two simple inexpensive processing techniques (direct and indirect) to produce surface metal matrix composites (SMMCs) by the casting route. SMMCs signify that the surface layer of a pre-selected thickness in the product contains the dispersoids, while its core is free from solid inclusion particles. Therefore,
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Surface Degradation of Composites
2010Abstract Polymer composite materials are subject to degradation if not appropriately protected from the environment. Composite materials having polymeric matrices are susceptible to degradation from heat, sunlight, ozone, atomic oxygen (in space), moisture, solvents (chemicals), fatigue, excessive loading, and combinations of these ...
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