Materials Literature
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Crystals of CaK 2 As 2 O 7 and CdK 2 P 2 O 7 , both grown from the melt, are monoclinic with Z = 4. The lattice parameters are a = 9.222(6), b = 5.835(3), c = 14.698(10) Å, β = 105.84(5)° with space group P2 1 /c for the diarsenate and a = 9.737(2), b = 5.548(1), c = 12.766(2) Å, β = 106.50(2)° with space group C2/c f…
A statistical model is developed to describe the orientation of particle easy axes with respect to the alignment direction in sintered SmCo5magnets. The model can be used to describe the three-dimensional orientation distributions measured by Swift et al [1]. using x-ray techniques, and with appropriate modification,…
Abstract Sequence lengths of stereochemical additions in vinyl polymers are described in terms of the number average lengths of like configurational placements. Under these circumstances, a pure syndiotactic polymer has a number average sequence length of 1.0; a polymer with 50:50 meso, racemic additions has a number…
Fracture mechanics has provided the means for making failure predictions regarding the lifetime of a glass or ceramic component in service. The background necessary for making these failure calculations from crack velocity and fatigue strength data is presented. The analysis of these types of data gives conservative f…
Abstract A series of novel AB monomers such as 2‐[ p ‐carboxyphenyl]‐5,6‐diaminobenzimidazole hydrochloride have been synthesized. In addition, a new aromatic monomer, 1,3‐diamino‐4,6‐bis( p ‐toluenesulfonamido)benzene has been prepared in high purity and substituted for 1,2,4,5‐tetraaminobenzene in a polymerization w…
A multiple-scattering formulation is given for the elastic scattering of electrons by a molecule, which is expressed by a sum of one-center long-range potentials and multicenter short-range potentials. The scattering amplitude for each potential is expressed using the partial wave method, and tractable formulae are gi…
The formation of a successful graft union depends on a complex series of interactions which take place between the cells of the stock and scion. As a result of these interactions processes which normally operate within the plant before the scion is separated from the stock are stimulated and redirected. In this paper…
The polarized absorption spectra of ${\mathrm{YAlO}}_{3}$:${\mathrm{Tm}}^{3+}$ were analyzed at 77\ifmmode^\circ\else\textdegree\fi{}K. A free-ion calculation was performed by fitting the centers of gravity of the $J$ manifolds. The coefficients which gave the best least-squares deviation of the calculated "free-ion"…
Abstract The vitamins, pyridoxine, pyridoxal, pyridoxamine, pyridoxal‐5′‐phosphate and pyridoxamine‐5′‐phosphate, have been studied in aqueous solution over a pH range of 2–12 by 13 C nuclear magnetic resonance spectroscopy. Resonance assignments are made primarily by the spin–spin coupling constants of carbons with p…
The development of permanent magnets based on the rare earth-cobalt 2-17 phases is reviewed. Powdered as well as sintered alloys of Sm2(Co, Fe)17have not shown very good permanent magnet properties. But modifications of these 2-17 phases with other, additional transition metals often exhibit more useful magnetic prope…
The complicated Fermi surface of graphite has been constructed successfully by using a new method of ab initio energy band calculation. The new method has been developed for he purpose of obtaining detailed band structures of layer-type crystals, in which the total wavefunction is constructed by two-dimensional OPW's…
Abstract The voltage relaxation of galvanic cells with zirconia electrolytes polarized between an inert silver electrode and an Fe + FeO electrode has been analyzed to obtain the diffusion coefficient of the electronic minority charge carriers in the temperature range between 700 and 900 °C. The method has been examin…
Abstract The piezoelectric d ‐ and e ‐constants, together with the elastic constant and the dielectric constant, were measured for oriented poly(γ‐benzyl‐glutamate) (PBG) films with various elongation ratios as a function of frequency and temperature, using an apparatus developed by us. The results are discussed in te…
The vertical sections of the Fe-Cr-Co system at 15wt%Co + 3wt%V, at 15wt%Co + 5wt%V, and at 15wt%Co + 3wt%V + 2wt%Ti are constructed. The extension of the α phase region of the system at 15%Co and 5%V, and at 15%Co and 3%V + 2%Ti is enough to allow for the solution treatment of the alloys with 21∼23%Cr at any temperat…
Insulation of 3.3 kV and 6.6 kV XLPE and PE cables was found to be mechanically stressed by 20 to 100 kg/cm2during the process of water tree formation. Infrared absorption curves change if water trees are created. A mechanism of the generation of water trees is discussed in detail. Critical values to judge the level o…
A new metallic glass, (METGLAS®alloy) Co74Fe6B20, has been identified which exhibits ∼ zero magnetostriction (|\lambda_{s}|<0.4\times10^{-6}). The saturation induction of this new alloy, 11.8 kG, is approximately twice that reported for other non-magnetostrictive glasses with similar transition-metal (TM) content b…
This paper considers the problem of estimating the core losses in a thin magnetic steel lamination when the driving flux contains not only the fundamental, but also odd harmonic components. Two numerical methods of predicting the eddy current losses due to an arbitrary flux waveform are briefly described. The importan…
Abstract Linear crystalline polymers can be processed to high degrees of orientation sufficient to produce dramatic increases in tensile strength and modulus. Three processes have been identified for inducing such orientation: cold drawing, hydrostatic extrusion, and solution spinning. All three processes utilize a hi…
A procedure for including measured analytical uncertainty into data analysis methodology is discussed. The suitability of various dispersion matrices and matrix rank determination criteria for data having analytical uncertainty is investigated. A criterion useful for judging the number of factors insensitive to analyt…
The observation of the domain pattern of 3% grain-oriented silicon-iron (transformer steel) by the Kerr magneto-optic effect has enabled a greater understanding of the basic magnetization processes of this material to be obtained. In this review paper, an attempt is made to describe recent progress in this field of st…