J. A. González、M. C. Andrade Perdrix1977-03-01Materiales de Construccion
En un trabajo anterior (1) se analizaron las distintas características de los métodos electroquímicos empleados hasta la actualidad para la detección del ataque localizado en el caso de un acero de construcción sumergido en disolución saturada de hidróxido cálcico, así como el efecto despasivante e inhibidor que sobre…
Richard E. White、A. W. Taylor1977-03-01Journal of Soil Science
Summary Measurements of equilibrium phosphate concentrations, adsorbed phosphate and isotopically exchangeable phosphate (E t ) were made on suspensions of acid soils at initial P concentrations ranging from 1–1000 μM and pH values between 4.2 and 6.8. At low P concentrations (1–100 μM), the affinity of the adsorption…
Soil and Water Nutrient DynamicsClay minerals and soil interactionsMine drainage and remediation techniques
Jeffrey D. Fowler、Dipankar Chandra、T.S. Elleman 等 5 位作者1977-03-01Journal of the American Ceramic Society
Tritium diffusion in aluminum and beryllium oxides was studied by recoiling tritium into specimens and measuring the time rate of tritium release during postirradiation heating. Results were consistent with classical diffusion solutions and gave single values for the diffusion activation energy over the temperature ra…
Fusion materials and technologiesNuclear Materials and PropertiesNuclear materials and radiation effects
F. E. Luborsky、J. L. Walter1977-03-01IEEE Transactions on Magnetics
The uniaxial magnetic anisotropy Kuinduced by a magnetic anneal has been determined, after stress relief, for a series of alloys given by (FeyNi1-y)80B20. For all of these alloys Kudepends on anneal temperature as predicted by directional order theory. The concentration dependence of Kuin these alloys is also consiste…
Magnetic properties of thin filmsTheoretical and Computational PhysicsChemical and Physical Properties of Materials
P. C. DOKKO、Joseph A. Pask、K. S. Mazdiyasni1977-03-01Journal of the American Ceramic Society
The high strength potential of single‐phase mullite was investigated under compressive stress‐strain and creep testing conditions at 1400° and 1500°C. In single‐crystal experiments, no plastic deformation and, hence, no dislocation glide was observed. Polycrystalline mullite was deformed via the Nabarro‐Herring mechan…
Advanced ceramic materials synthesisAluminum Alloys Composites PropertiesIntermetallics and Advanced Alloy Properties
Keith G. Lyon、G. L. Salinger、C. A. Swenson 等 4 位作者1977-03-01OpenAlex
Linear thermal expansion measurements have been carried out from 6 to 340 K on a high-purity silicon sample using a linear absolute capacitance dilatometer. The accuracy of the measurements varies from ±0.01×10−8 K−1 at the lowest temperatures to ±0.1×10−8 K−1 or 0.1%, whichever is greater, near room temperature, and…
Semiconductor materials and devicesForce Microscopy Techniques and ApplicationsThermal properties of materials
L. C. E. Struik1977-03-01OpenAlex
Abstract This paper surveys the basic aspects of physical aging. It shows that aging i s a general and important phenomenon found in all organic and inorganic glasses and in some metals as well. Moreover, the behavior of all these materials is very similar. It further shows that aging cannot be ignored in the testing…
Material Dynamics and PropertiesGlass properties and applicationsBuilding materials and conservation
J. S. Vrentas、J. L. Duda1977-03-01OpenAlex
Abstract The free‐volume theory describing diffusion in polymer–solvent systems is reexamined. Calculation of the specific free volume for such systems is discussed, and equations are presented for the determination of the self‐diffusion coefficients of the polymer and the solvent. Conditions under which the mutual di…
Material Dynamics and PropertiesRheology and Fluid Dynamics StudiesDiffusion Coefficients in Liquids
Yu.Yu. Kercha、Yu.S. Lipatov1977-02-28Russian Chemical Reviews
Recent advances in the investigation of polyurethanes are surveyed. Considerable attention is paid to copolyurethanes based on multicomponent initial constituents, which may exhibit thermoplastic or thermoelastoplastic properties depending on the distribution of the components in the chain and the length of the glycol…
Polymer composites and self-healingEpoxy Resin Curing Processes
M. L. W. Thewalt1977-02-28Physical Review Letters
My high-resolution studies of the bound-exciton luminescence in Ga-doped Si reveal a triplet structure. Also, I report for the first time bound multiexciton complexes associated with Ga, which are similar to those previously reported for Si doped with P, Li, and and B. In the case of Ga, however, the $m=2$ bound-multi…
Silicon and Solar Cell TechnologiesSilicon Nanostructures and PhotoluminescenceSemiconductor materials and interfaces
P. L. Hanley、I. Kiflawi、Andrew Lang1977-02-25Philosophical Transactions of the Royal Society of London Series A Mathematical and Physical Sciences
Abstract An extensive examination of the cathodoluminescent emissions from natural diamonds has been performed with due regard to their inhomogeneity, correlating cathodoluminescence properties point-by-point with the local crystal lattice texture and imperfection content as revealed by other topographic techniques (i…
High-pressure geophysics and materialsDiamond and Carbon-based Materials ResearchGlass properties and applications
W. T. Allen、D. E. Eaves1977-02-24Die Angewandte Makromolekulare Chemie
Abstract Caprolactam has been polymerised by sodium hydride in the presence of isocyanate terminated polymers. The latter participate in the initiation reaction and allow the preparation of materials where the prepolymer can amount to 50% of the product. There is evidence that block copolymers are formed, and the prop…
Advanced Polymer Synthesis and Characterizationbiodegradable polymer synthesis and propertiesPolymer composites and self-healing
C.S. Lakshminarasimha、J. Lucas1977-02-21Journal of Physics D Applied Physics
The ratio of the radial diffusion coefficient to mobility D r / mu exp has been measured for the first time in five gases at high E/N (ratio of electric field to gas number density). The range of E/N was as follows: helium 3<or=E/N<or=847 Td; argon 8<or=E/N<or=1271 Td; air 14<or=E/N<or=1412 Td; methane 14<or=E/N<or=56…
Advanced Chemical Physics StudiesCatalytic Processes in Materials Sciencenanoparticles nucleation surface interactions
Taira Nakano、Hiroshi Kawatani、Shushi KINOSHITA1977-02-15Transactions of the Iron and Steel Institute of Japan
Effecls of chro mium, moly'bdenum and vanadium on slJheroidi z alion of carbides in 0.8 0 a carbon sleel b)' slow cooling annealing have been invesligaled.
Metal and Thin Film MechanicsAdvanced materials and compositesMetal Alloys Wear and Properties
Kazuo Yamanaka、Yasuya Ohmori1977-02-15Transactions of the Iron and Steel Institute of Japan
The effect oj boron on the transformation oj 10w-carbon-!-mo!),bdCllum steels has been investigated by means oj dilatomelly and microstructural observations.The steels containing boron below 30 ppm exhibits the largest hardenability in the case oj austenitization at 930°C, but the hal-denability is reduced by austmiti…
Metal and Thin Film MechanicsMetal Alloys Wear and PropertiesMaterial Properties and Applications
Jan W. Vandersande1977-02-15Physical review. B, Solid state
The low-temperature thermal conductivity of three type-II $a$ diamonds irradiated with 0.75-MeV electrons at room temperature and one irradiated at 77 K was found to be reduced and is characteristic of phonon scattering by large aggregates: the conductivity changing from Rayleigh scattering at the lowest temperatures…
High-pressure geophysics and materialsDiamond and Carbon-based Materials ResearchThermal properties of materials
D. Spanjaard、D. W. Jepsen、P. M. Marcus1977-02-15Physical review. B, Solid state
The theory of the angularly dependent photoemission from a semi-infinite crystal as a one-step process is briefly reviewed, starting from the formulas of Adawi and using surface-matched wave functions in both upper and lower states and absorption in the upper state. We derive conditions under which the three-step mode…
Advanced Chemical Physics StudiesElectron and X-Ray Spectroscopy TechniquesGa2O3 and related materials
G. S. Agarwal1977-02-15Physical review. B, Solid state
A systematic perturbation theory is developed to study the interaction of electromagnetic waves at rough dielectric surfaces. The Ewald-Oseen extinction theorem is used as the basis of the perturbation theory. Explicit expressions for both first-order and second-order fields (in terms of the surface roughness paramete…
Plasmonic and Surface Plasmon ResearchOptical Coatings and GratingsNear-Field Optical Microscopy
J. Márton、B. D. Jordan1977-02-15Physical review. B, Solid state
In previous publications we reported on the optical properties of aggregated metal systems, where the metal particles were assumed to be free-electron type with damping, and where they were assumed to be dispersed in a dielectric medium with a varying index of refraction. The main results were the shift of bulk and su…
Gold and Silver Nanoparticles Synthesis and ApplicationsMolecular Junctions and NanostructuresSurface and Thin Film Phenomena
Y. Shapira、R. B. McQuistan、David Lichtman1977-02-15Physical review. B, Solid state
We report measurements of C${\mathrm{O}}_{2}$ photodesorption and associated surface-conductivity changes in ZnO. The measurements show a one-to-one correspondence between the rates of those two quantities. The rates of both C${\mathrm{O}}_{2}$ photodesorption and surface-conductivity changes are initially fast, becom…
ZnO doping and propertiesAdvanced Condensed Matter PhysicsGa2O3 and related materials