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The thermal expansion coefficient α of Fe-Ni ( fcc ) alloys was measured in the range from 800°C to room temperature. Below the Curie temperature T c , the α– T curve exhibits an anomaly corresponding to the spontaneous volume magnetostriction ω s . The `paramagnetic' thermal expansion coefficient α p below T c was de…
A defect structure which incorporates singly and doubly ionized nonstoichiometric oxygen vacancies and acceptor states, presumably associated with impurities, was inferred from the agreement between the theoretically derived relation image and the experimentally observed O 2 ‐partial‐pressure and temperature dependenc…
The effect of thermal history on yielding behavior of atactic polystyrene, isotactic polystyrene, polycarbonate, and polymethyl methacrylate was examined by correlating the deformed microstructure with measured density changes and compressive stress-strain studies. Electron micrographs of bulk polymers and thin films…
In this study histochemical experiments have been carried out in order to understand the "staining mechanism" of phosphotungstic acid (PTA). One of the main objectives of this project was to investigate the mode of interaction of the heavy metal and to define the type of functional groups in the substrates responsible…
The active slip planes, the Burgers vector, and the critical resolved shear stress to induce macroscopic deformation in ZrB 2 single crystals were determined. Room‐temperature microhardness indentation and high‐temperature uniaxial compression loadings were used to induce deformation. Slip occurred in a close‐packed α…
The vapor phase in equilibrium with cuprous chloride has been studied using the Knudsen effusion-mass spectrometric technique. The polymeric species Cu3Cl3, Cu4Cl4, and Cu5Cl5 were observed, the first two in comparable amounts. Partial pressures and heats of vaporization for each species were measured: 3 CuCl(s)→Cu3Cl…
The application of statistical methods to the field of cable dielectric strength is discussed on the basis of experimental results.
Abstract The effects of vinyl acetate content on crystallinity of ethylene–vinyl acetate (E/VA) copolymers were investigated by x‐ray diffraction and differential thermal analysis (DTA). The values of these parameters obtained from DTA were found to agree quantitatively with data calculated from x‐ray, probability equ…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray photoelectron spectroscopic investigation of Group VIA elementsWilliam E. Sartz, Kenneth J. Wynne, and David M. HerculesCite this: Anal. Chem. 1971, 43, 13, 1884–1887Publication Date (Print):November 1, 1971Publication History Published online1 May 2002Published inissu…
The dependence of hyperfine fields at 0 \ifmmode^\circ\else\textdegree\fi{}K at ${\mathrm{Fe}}^{57}$ nuclei in octahedral ($B$) and tetrahedral ($A$) sites in ferrites on the kind of nearest neighbors is discussed in terms of supertransferred hyperfine fields ${H}_{\mathrm{S}\mathrm{}\mathrm{THF}}$. An expression for…
The sounds emitted from single crystals of irradiated LiF, annealed LiF, NaCl, and zinc during constant-strain-rate compressive deformation were recorded and analyzed. The acoustic emission consisted of discrete pulses of varying amplitudes, and the rate of pulsing changed with total strain during the continuous defor…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInduced circular dichroism in cholesteric liquid crystalsF. D. Saeva and J. J. WysockiCite this: J. Am. Chem. Soc. 1971, 93, 22, 5928–5929Publication Date (Print):November 1, 1971Publication History Published online1 May 2002Published inissue 1 November 1971https://pubs.acs.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPathways of radiative and radiationless transitions in europium(III) solutions. The role of high energy vibrationsYehuda Haas and Gabriel SteinCite this: J. Phys. Chem. 1971, 75, 24, 3677–3681Publication Date (Print):November 1, 1971Publication History Published online1 May…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPathways of radiative and radiationless transitions in europium(III) solutions. Role of solvents and anionsYehuda Haas and Gabriel SteinCite this: J. Phys. Chem. 1971, 75, 24, 3668–3677Publication Date (Print):November 1, 1971Publication History Published online1 May 2002Pub…
Electromagnetic radiation approximately equal to band-gap energy has been established as responsible for the dissociation of amorphous As2Se3 and As2S3. The dissociation is accompanied by an optical densification observable as a ``photographic'' effect in thin films of these materials. The dissociation can be expresse…
An apparatus based on Bridgman's bellows method, originally devised for fluids, has been constructed for use with solid samples. Mercury is employed as the confining liquid. The operating range is 0≤t≤200 °C and 1≤P≤2000 bar. Calibration with benzene and mercury shows an accuracy of ±2×10−4 cm3/g in the measurement of…
The time dependence of the luminescence decay following pulsed excitation is examined for a system in which excited paramagnetic ions decay by a combination of intrinsic relaxation processes, direct energy transfer to acceptor ions, and energy migration. Three limiting cases are considered: direct energy transfer in t…
The dielectric permittivity and the dielectric loss factor of 5-methyl-3, 4-methyl-3 and 3-methyl-3-heptanol, n- and iso-butanol, 1,2-propanediol, dimethyl and diethyl phthallate, and 3-methylpentane have been measured from 50 to 105 Hz and from −196 to about 20°C above their respective glass transition temperatures.…
Laves phase compounds Zr(Fe, Co) 2 have MgCu 2 structure and Zr(Fe, Mn) 2 change the structure from MgCu 2 type to MgZn 2 type with composition change. Both compounds change from ferromagnetism to paramagnetism with decreasing Fe content and the magnetic moment of Fe, Mn, Co decrease from 1.62, 0.62, 0.62 µ B to zero.…
The thermal conductivities of three single crystals of BeO have been measured from 2 to 300 K. Phonons carry the heat at all temperatures. At 300 K the conductivity is 3.7 W/cm K, which is slightly less than that of copper. In the purest sample the maximum conductivity occurs at 45 K where it is 137 W/cm k, and at tem…