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  • 1
    Electronic Resource
    Electronic Resource
    Processing of pressureless-sintered SiC whisker-reinforced Al2O3 composites (1987)
    Springer
    Journal of materials science 22 (1987), S. 4403-4406 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Silicon carbide whisker-reinforced Al2O3 Composites were prepared using a processing scheme in which the constituents were dispersed in nonaqueous media, then colloid-pressed and pressureless-sintered under an inert atmosphere. Novel oligomeric and polymeric dispersants were used to sterically stabilize the SiC whiskers in the presence of the Al2O3 powder. The sintering studies indicated that in the absence of a suitable sintering aid, the whiskers significantly inhibited densification of the Al2O3 matrix. Doped composites containing yttrium isopmpoxide as a sintering aid were pressureless-sintered to final densities 95% of theoretical.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01132037
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  • 2
    Electronic Resource
    Electronic Resource
    Covalently bonded organosilicon and organoaluminium dispersants for silicon carbide (1987)
    Springer
    Journal of materials science 22 (1987), S. 4532-4535 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Covalently bonded organosilicon and organoaluminium compounds were used as dispersants for SiC powder and whiskers in hexane. The improved dispersion resulted in a threefold increase in whisker packing density in sedimented compacts. Comparison experiments with organosilanes having the formulas RSi (OCH3)3 and RSiCl3 showed that the chlorosilanes were much more effective than their alkoxy counterparts in dispersing SiC powder. The aluminium alkoxy carboxylate aluminiumsec-butoxide stearate was also a much more effective dispersant for SiC than the alkoxysilanes. Fourier transform infrared spectroscopy and solid-state13C nuclear magnetic resonance were used to characterize the organometallic dispersants grafted to the surface of the SiC.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01132058
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  • 3
    Electronic Resource
    Electronic Resource
    A field-space conformai solution method (1990)
    Springer
    International journal of thermophysics 11 (1990), S. 49-59 
    Details
    ISSN: 1572-9567
    Keywords: binary mixture ; conformal solution ; corresponding states ; critical phenomena ; equation of state ; field space ; mixtures
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We propose a radical extension of the principle of corresponding states to mixtures. All previous methods of which we are aware are based upon the application of “mixing rules” which are explicit in the compositions of the resultant, or target, mixture. In the present development these relations are functions of field variables alone, specifically the activities of the reference system. This has a profound effect upon the basic machinery of the transformations. For example, when the new method is used to map the properties of a binary fluid mixture onto those of a pure fluid (and in contrast to the description of a mixture by one-fluid theory with van der Waals mixing rules), the dew-bubble-point surface of the mixture is mapped onto the vapor pressure curve of the pure fluid, and the critical line of the mixture is mapped onto the critical point of the pure fluid. Thus, there is no separate “pseudocritical” locus. The principal technical advantage of such a development is numerical; calculation of the location of vapor-liquid coexistence and critical manifolds is enormously simplified. The most important theoretical aspect associated with the new method is that if the reference system is described by an equation of state which obeys the critical scaling laws, then the entire critical manifold of the target system will also exhibit critical scaling.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00503858
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  • 4
    Electronic Resource
    Electronic Resource
    A field-space conformal-solution method: Binary vapor-liquid phase behavior (1990)
    Springer
    International journal of thermophysics 11 (1990), S. 61-72 
    Details
    ISSN: 1572-9567
    Keywords: conformal solution ; hydrocarbon binary mixture ; mixture thermodynamics ; vapor-liquid equilibrium ; vapor-liquid phase behavior
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The field-space conformal solution method provides an entirely new thermodynamic framework for the description of fluid mixtures in terms of the properties of a pure reference fluid. The utility and performance of the method are examined in the special case of vapor-liquid equilibrium correlation for simple mixtures. This is one of several cases in which field-space methods have numerical or theoretical advantages over methods presently used in mixture property correlation; only properties along the vapor pressure curve of the purefluid reference system are required for a complete description of the mixture phase behavior. Vapor-liquid equilibrium data for three binary hydrocarbon mixtures, n-butane + n-pentane, n-butane + n-hexane, and n-butane + n-octane, are correlated with a simple implementation of the method having two independent mixture parameters. Two pure-fluid equations of state, a Peng-Robinson equation and a 32-constant modified Benedict-Webb-Rubin equation, are tested as reference systems. The effects of differences in the quality of the reference system and of a range of mixture component size ratios are examined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00503859
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  • 5
    Electronic Resource
    Electronic Resource
    Moisture-assisted crack growth at epoxy–glass interfaces (1998)
    Springer
    Journal of materials science 33 (1998), S. 4581-4588 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The double cleavage drilled compression (DCDC) test was used to measure the critical energy release rate, moisture-assisted crack growth, and fatigue threshold for epoxy–glass interfaces bonded with and without a silane coupling agent. The DCDC specimen consists of two glass beams (either soda-lime or fused silica) bonded together with an epoxy adhesive. A through-the-thickness hole is drilled in the centre of the specimen. In the DCDC test compressive loading causes tensile stresses to develop at the poles of the drilled hole. Cracks then nucleate in the epoxy–glass interface, extend from the poles, and propagate axially along the interface in primarily mode I loading. The resistance to moisture-assisted crack growth at untreated epoxy–glass interfaces is significantly less than that in monolithic glass specimens. However, the resistance to moisture-assisted crack growth at silane bonded epoxy–glass interfaces can be comparable with or greater than that in monolithic glass. Silane bonding of epoxy to glass is more effective with fused silica than soda-lime glass, with the fatigue limit of silane bonded epoxy–fused silica interfaces being about 2.5 times greater than that for silane bonded epoxy–soda-lime glass. These results are discussed in terms of possible interfacial crack growth mechanisms. © 1998 Kluwer Academic Publishers
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004477006957
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  • 6
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    Observation of the First-Order Raman Scattering inSrTiO3Thin Films (1999)
    American Physical Society
    Details
    Publication Date: 1999-05-31
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society
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  • 7
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    Long-term study of backgrounds in the DRIFT-II directional dark matter experiment (2014)
    Institute of Physics
    Details
    Publication Date: 2014-07-17
    Electronic ISSN: 1748-0221
    Topics: Physics
    Published by Institute of Physics
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  • 8
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    Covalently bonded organosilicon and organoaluminium dispersants for silicon carbide (1987)
    Springer
    Details
    Publication Date: 1987-12-01
    Print ISSN: 0022-2461
    Electronic ISSN: 1573-4803
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Springer
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  • 9
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    Moisture-assisted crack growth at epoxy–glass interfaces (1998)
    Springer
    Details
    Publication Date: 1998-09-01
    Print ISSN: 0022-2461
    Electronic ISSN: 1573-4803
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Springer
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  • 10
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    Soil pipe flow tracer experiments: 2. application of a streamflow transient storage zone model (2015)
    Wiley
    Details
    Publication Date: 2015-10-14
    Description: Soil pipes are important subsurface flow pathways in many soil erosion phenomena. However, limited research has been performed on quantifying and characterizing their flow and transport characteristics. The objectives of this research were to determine the applicability of a streamflow model with transient storage in deriving flow and transport characteristics of soil pipes. Tracer data from pulse inputs were collected in four different soil pipes after a fluorescein dye was injected in the upstream end of each soil pipe network in three Branches (West, Middle, and East) of a Main Catchment and a Back Catchment in Goodwin Creek Experimental Watershed in Mississippi. Multiple sampling stations were positioned along each soil pipe network. The transient storage zone model OTIS-P was executed inversely to estimate transport parameters by soil pipe reach such as the soil pipe cross-sectional area ( A ), soil storage zone cross-sectional area ( A s ), and exchange rate between the soil pipe and the soil storage zone ( α s ). Model convergence was achieved, and simulated breakthrough curves of the reaches were in good agreement with actual tracer data for eight of the nine reaches of the three Branches of the Main Catchment and five of the seven reaches of the Back Catchment soil pipe. Simulation parameters for the soil pipe networks were similar to the range of values reported for flow and transport characteristics commonly observed in streams. Inversely estimated soil pipe flow velocities were higher with increased tortuosity which led to a smaller cross-sectional areas predicted for the soil pipe flowpaths while other parameters were not sensitive to tortuosity. In general, application of OTIS-P to this unique soil pipe condition suggested larger transient storage ( A s and α s ) compared to most stream systems. This was hypothesized to be due to relatively higher ratio of the wetted perimeter to flow area in the soil pipe, the hydraulic roughness of the soil pipe, potential retention in collapsed portions of the pipe, and interaction with smaller preferential flow systems. This article is protected by copyright. All rights reserved.
    Print ISSN: 0885-6087
    Electronic ISSN: 1099-1085
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Published by Wiley
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