Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract A method of analysis is given by which the critical strain energy release rate G c for impact tests may be deduced for both Charpy and Izod tests from normal energy measurements. Suitable calibration factors are determined and the method is applied to a range of polymers. Very close agreement is achieved betw…
Not available
No available
Not available
No available
Not available
Biomaterials are capable of heat transfer-energy transport by virtue of a temperature gradient. In the case of a living biomaterial, the heat transfer capability of the material can be especially important because the state of life may depend upon the maintenance of a specific temperature. All of the three basic mecha…
Abstract Poly‐ p ‐benzamide of high molecular weight (η inh = ∼ in H 2 SO 4 ) was obtained by the direct polycondensation reaction of p ‐aminobenzoic acid ( p ‐ABA) by means of diphenyl and triaryl phosphites in N ‐methylpyrrolidone (NMP)‐pyridine solution containing lithium and calcium chlorides. Molecular weight of…
A set of constitutive equations has been formulated to represent elastic-viscoplastic strain-hardening material behavior for large deformations and arbitrary loading histories. An essential feature of the formulation is that the total deformation rate is considered to be separable into elastic and inelastic components…
The basic physical parameters which govern the metal-insulator transition in vanadium dioxide are determined through a review of the properties of this material. The major importance of the Hubbard intra-atomic correlation energy in determining the insulating phase, which was already evidenced by studies of the magnet…
This review gives information on the electric and optical properties of liquid crystals (LC), and discusses in detail various electro-optical effects in nematic, cholesteric, and smectic LC. Dielectric deformations of LC in electric fields, electrodynamic instabilities, the electromechanical effect, etc., are treated.…
An experimental investigation of impact-initiated failures in high-strength graphite/epoxy and Kevlar-49/epoxy sandwich structures has been conducted. The tests consisted of firing small diameter aluminum projectiles with a velocity range of 16-67 meters/second (52-220 ft/sec) at preloaded sandwich specimens. These te…
Plasmons in the one-dimensional organic metal tetrathiafulvalene-tetracyanoquinodimethane were directly measured by high-energy inelastic electron scattering in thin crystalline films at 300\ifmmode^\circ\else\textdegree\fi{}K. For plasmons propagating along the conducting $b$ axis the plasmon energy decreases from 0.…
Optically induced ESR and absorption due to localized paramagnetic states in the forbidden gap have been observed in several semiconducting chalcogenide glasses below \ensuremath{\sim}15 K. Analysis of the ESR spectra indicates that these centers are holes localized on chalcogens and are not directly associated with i…
An analysis is given of the changes that occur in the thermal conductivity of a solid containing resonant phonon scattering centres when there are crossings or anticrossings of levels involved in the scattering. At a level crossing, the changes are due to interference between the scattering processes involving the two…
We present the first photograph of an electron-hole drop in germanium.Received 21 April 1975DOI:https://doi.org/10.1103/PhysRevLett.34.1292©1975 American Physical Society
The electrical resistivity (semiconductor–metal transition), the thermoelectric power, and the magnetic susceptibility of well-characterized VO2 monocrystals and powdered samples in the range of homogeneity were measured. The physical properties gave no hint of an extension of the range of homogeneity towards oxygen e…
Sn doped In2O3 films are electrically conductive and transparent in the visible range of the spectrum. Films with a plasma wavelength in the 1 μm region have been prepared by spraying a solution of InCl3 and SnCl4 onto a heated substrate. The free electron concentration is observed to increase with the Sn content up t…
Tracer diffusion of $^{64}\mathrm{Cu}$ in $\ensuremath{\alpha}\ensuremath{-}\mathrm{Z}\mathrm{r}$ single crystals has been measured in the temperature range (615-860)\ifmmode^\circ\else\textdegree\fi{}C. The temperature dependences of the $^{64}\mathrm{Cu}$ diffusion coefficients in directions parallel to and perpendi…