Materials Literature
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The analysis of Barkhausen noise amplitude distributions is applied to the study of strain dependence of the magnetization process between 0 and 16 % strain in commercial grain oriented and isotropic Fe- 3.5 % Si sheet. The Barkhausen noise is excited at 4 Hz magnetizing frequency and analysed in the range 300 to 15,0…
Extends the discussion of escape peaks and internal silicon fluorescence presented by Reed and Ware (see ibid., vol.5, no.6, p.582 (1972)) to the case where the surface of the lithium-drifted silicon detector is not normal to the direction of the incident X-rays. This oblique geometry is used in several SEM and microp…
Measurements as a function of temperature t were performed on directional FeSi 3%, in order to study the possible influence on the power loss anomalies of a change of intrinsic parameters, such as crystalline anisotropy energy K, without affecting the extrinsic ones, such as grain size and orientation. Power losses pe…
The saturation magnetization, Curie temperature, easy direction of magnetization and anisotropy field of Er2Co17-xMxcompounds where M = Fe, Mn or Ni were investigated. It was not possible to prepare single phase materials for x > 6 when M = Mn and for x > 10 when M = Ni. The Mn containing ternaries possess an easy dir…
Diffusion couples formed in the range600 - 800\degC, between cobalt-copper alloys (0-25 at. % Cu) and Sm(Co,Cu)3containing the same amount of copper, have shown that copper progressively depresses the eutectoid transformation of SmCo5down to 600° C at 21 at. % copper. The data indicate the transformation temperature o…
The mechanism of collagen glucosyltransferase reaction was studied with enzyme preparations purified about 2500-5000-fold from extract of homogenate of whole chick embryos. Data obtained in experiments on initial velocity and inhibition kinetics of the reaction were consistent with an ordered mechanism in which the su…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSalt-type complexes of porphyrins: monocation octaethylporphinium tri-.mu.-halogeno-hexacarbonyldirhenate(I)C. P. Hrung, M. Tsutsui, D. L. Cullen, and E. F. Meyer Jr.Cite this: J. Am. Chem. Soc. 1976, 98, 24, 7878–7880Publication Date (Print):November 1, 1976Publication Hist…
peer reviewed
Abstract Pit initiation at the passive alloy Fe5 Cr was studied and compared to the results obtained with pure iron. At constant electrode potential the addition of chloride to the solution increases the dissolution rate of Fe(III). Above the critical pitting potential the first pits develop during a time of incubatio…
Loops of rat bladder were stretched between pins in vitro, supported by a clamp that could be suddenly shortened by activation of a solenoid to achieve a quick release of tension. The series elasticity measured in this fashion was found to follow an exponential course and to be modified by the rate of release, indicat…
Co-Gd-Sm alloys were made by calcium co-reduction of mixtures of Gd2O3and Sm2O3in the presence of cobalt powder. Both the base alloy (Co5Gd0.4Sm0.6) and the sintering additive (Co7Gd0.8Sm1.2) were made by this lower cost R/D process. Die-pressed magnets with a reversible temperature coefficient of magnetization of -0.…
By neutron diffraction we found a decision on the distribution of the Al-Si(Ge)-atoms and the location of the lithium-atoms in the structures of the compounds LiAlSi and LiAlGe
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"…