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Construcción y reparación de hornos rotatorios

W. Bohman1956-01-01Materiales de Construccion

El empleo de la soldadura facilita la reparación de los hornos rotatorios, acortando el tiempo necesario para dicha operación. Se presentan diversos ejemplos prácticos.

Lattice energy of ionic crystals

A. F. Kapustinskii1956-01-01OpenAlex

The first page of this article is displayed as the abstract.

Electronic and Structural Properties of OxidesMachine Learning in Materials ScienceSurface and Thin Film Phenomena

Oxidation of Alloys Involving Noble Metals

Carl Wagner1956-01-01OpenAlex

Diffusion processes during the oxidation of alloys involving noble metals are analyzed theoretically. An oxide film of uniform thickness is stable only if diffusion in the alloy is relatively rapid compared with diffusion in the oxide of the less noble metal. Otherwise, there is the tendency to form a rugged alloy‐oxi…

High-Temperature Coating BehaviorsCatalytic Processes in Materials Science

Dynamic Method for Measuring the Pyroelectric Effect with Special Reference to Barium Titanate

A. G. Chynoweth1956-01-01OpenAlex

A dynamic method has been developed for the study of the pyroelectric effect. Transient currents produced in single crystals of barium titanate when subjected to flashes of light are shown to be pyroelectric in origin. The illumination results in a small change in the temperature of the crystal which, in turn, causes…

Geophysics and Sensor TechnologySolid-state spectroscopy and crystallographyOptical and Acousto-Optic Technologies

III. Dislocation densities in some annealed and cold-worked metals from measurements on the X-ray debye-scherrer spectrum

G.K. Williamson、R.E. Smallman1956-01-01OpenAlex

Two basic equations are derived for deducing the dislocation density in powdered materials from the particle size and strain breadth measured from the Debye-Schemer spectrum. In the particle size estimate, it is assumed that the material has a block structure similar to that found in microbeam studies and that the dis…

Microstructure and mechanical propertiesAluminum Alloy Microstructure PropertiesPowder Metallurgy Techniques and Materials

Field Emission Microscopy of an Allotropic Transformation:α−βTitanium

E. G. Brock1955-12-15Physical Review

The field emission microscope has been applied to a study of the allotropic transformation in single microcrystals of titanium. Patterns with symmetry characteristic of the high and low temperature phases are presented. Techniques for analyzing the patterns are outlined. Data derived from the pattern analyses give an…

Titanium Alloys Microstructure and PropertiesMicrostructure and mechanical propertiesMicrostructure and Mechanical Properties of Steels

Ferromagnetic Resonance in Manganese Ferrite Single Crystals

P. E. Tannenwald1955-12-15Physical Review

The microwave properties of two types of manganese ferrite single crystals have been investigated by means of the ferromagnetic resonance phenomenon from 300\ifmmode^\circ\else\textdegree\fi{}K to 4.2\ifmmode^\circ\else\textdegree\fi{}K and at 24 000, 9100, 5600, and 2800 Mc/sec. The low resistivity of one of the crys…

Magnetic Properties and Synthesis of FerritesElectromagnetic Effects on MaterialsSemiconductor materials and interfaces

Interpretation of the Optical Properties of Metal Surfaces

S. Roberts1955-12-15Physical Review

The surface optical properties of the metals Ag, Au, Cu, Pt, Ir, and Ni in the infrared are shown to obey a simple generalized form of the Drude formula for the free electron theory, but involving two types of free electrons. If the surface optical constants are not anomalous, this procedure may be interpreted as a so…

Copper Interconnects and ReliabilitySurface and Thin Film PhenomenaSemiconductor materials and devices

Hall Effect and Conductivity of InSb

Henry J. Hrostowski、François Morin、T. H. Geballe 等 4 位作者1955-12-15Physical Review

Hall coefficient and conductivity of single-crystal InSb have been measured from 1.3\ifmmode^\circ\else\textdegree\fi{}K to 700\ifmmode^\circ\else\textdegree\fi{}K. Impurity band conduction and an acceptor ionization energy of 7\ifmmode\times\else\texttimes\fi{}${10}^{\ensuremath{-}3}$ ev have been observed in $p$-typ…

Advanced Semiconductor Detectors and MaterialsZnO doping and propertiesSemiconductor Quantum Structures and Devices

Effects of temperature on the plastic properties of aluminium crystals

Alan Cottrell、Robert J. Stokes1955-12-06OpenAlex

Abstract By changing the temperature of deformation, during tensile experiments on single crystals of aluminium , it has proved possible to separate reversible changes of flow stress with temperature from irreversible ones. Below 130° K the reversible change of flow stress is large; above room temperature it is hardly…

Microstructure and mechanical propertiesAluminum Alloy Microstructure PropertiesMetal Forming Simulation Techniques