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 Effects of supercooling have been studied in a range of basaltic melts by isothermal and constant cooling rate experiments at one-atmosphere, using the wire-loop container method. The nucleation of plagioclase in these melts is systematically controlled by supercooling (-Δ T ), time below the liquidus tempera…
The chemical group contribution technique, based on the principle of additivity of molar refraction and polarization constants for groups in a molecule, has been used for determining the solubility parameters of acrylamide series polymers. The solubility parameter for a polymer is calculated through its components by…
The conductivity of solutions was determined at temperatures from −30° to +60°C. The maximum specific conductivities at −30°, 30°, and 60°C were found to be 3.25, 6.7, 8.7 mmho cm −1 , respectively. The discharge performance of sandwich‐like glass laboratory cells was determined at rates of 0.8–13 mA cm −2 over this t…
A comparison has been carried out between the results of analyses of several sets of neutron powder diffraction data using three different methods: the Rietveld method [Rietveld (1967). Acta Cryst. 22, 151-152; (1969) J. Appl. Cryst. 2, 65-71], a modification of the Rietveld method to include off-diagonal terms in the…
Mössbauer spectra of 197Au in Cs2Au2Cl6 were studied at 1 bar (4.2 and 45 K) and at 68 kbar (2.1, 4.2, 25, 40, and 45 K). Further, 197Au spectra in Cs2AgAuCl6 were studied at 1 bar and 31 kbar (4.2 K) and in AuI at 1 bar and 45 kbar (4.2 K). The pressure-induced changes in the isomer shifts and quadrupole splittings o…
A micromechanical model is presented to relate the mechanical properties of low‐density fibrous ceramic bodies to their micro‐structures and the properties of the fibers. It is found that properties such as the elastic moduli, fracture toughness, and strength depend on the fiber spacing. In particular, it is shown tha…
Abstract A du Pont 990 differential scanning calorimeter was modified to measure thermal conductivity of elastomer vulcanizates. The method is quick and reproducible and is recommended for scouting research of polymeric materials. The thermal conductivity λ values obtained by this method of some known materials compar…
High temperature gaseous equilibria involving the lower-valent uranium fluorides UF, UF2, UF3, and UF4 were studied by mass spectrometry, and reaction enthalpies and entropies with estimated uncertainties of ±2 kcal/mol and ± 2 cal/deg mol were derived solely from the temperature coefficients of reaction equilibrium c…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular structure and quadratic force field of chromyl chloride, CrO2Cl2C. J. Marsden, Lise Hedberg, and Kenneth HedbergCite this: Inorg. Chem. 1982, 21, 3, 1115–1118Publication Date (Print):March 1, 1982Publication History Published online1 May 2002Published inissue 1 Mar…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProperties of two-dimensional polymersJan Tobochnik, Itzhak Webman, Joel Lebowitz, and M. H. KalosCite this: Macromolecules 1982, 15, 2, 549–553Publication Date (Print):March 1, 1982Publication History Published online1 May 2002Published inissue 1 March 1982https://pubs.acs.…
The paper characterizes point processes with the order statistic property without the unnecessary condition of finiteness of the first moment of the process, a condition imposed by previous researchers. It shows that the class of these processes is composed only of mixed Poisson processes up to a time-scale transforma…
Ternary Sm2Co17−xTx systems in which Co is replaced by V, Ti, Zr, and Hf have been studied to ascertain the efficacy of these elements in improving the permanent magnet characteristics of Sm2Co17-based magnets. Single phase materials were obtained for 0?x?1.0. X-ray diffraction measurements indicate that these compoun…
The distortion of the structure of a simple fluid of spherical particles when subjected to a shear is analyzed. The orientational distribution of particles around a central particle is examined via the radial distribution function. General symmetry arguments are advanced. Computer-simulation results using the techniqu…
The saturation magnetostriction λs of Fe, Co, and Ni films was measured by the cantilevered substrate technique. The values of λs, −6.8×10−6 and −38×10−6, obtained for Fe and Ni, respectively, are in accord with bulk published values. A unique value of λs could not be obtained for Co because the sputtered or evaporate…
Highly vibrationally excited NO(v = 1–10) has been created by irradiation of N2/trace O2 mixtures with 36 keV electrons. The resulting spectrally-resolved time histories of the NO fundamental vibration/rotation band have been analyzed to determine the room temperature rate constants for the processes NO(v)+O2→NO(v−1)+…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTris(2-(aminomethyl)pyridine)iron(II): a new spin-state equilibrium in solutionHelena Li Chum, J. A. Vanin, and Maria Isaura D. HolandaCite this: Inorg. Chem. 1982, 21, 3, 1146–1152Publication Date (Print):March 1, 1982Publication History Published online1 May 2002Published…
Optically stimulated luminescence (OSL) from CaS:Eu,Sm and SrS:Eu,Sm phosphors, previously exposed to ionizing radiation, is shown to occur with response and decay times of less than 50-ns full width at half-maximum. This result indicates that fast high-resolution OSL imaging of spatial dose distributions is possible…
The stress corrosion cracking (SCC) of sensitized Type 304 stainless steel in thiosulfate solutions has been studied using constant extension rate tests. Very low concentrations of about 6.10−7M Na2S2O3 (0.1 ppm) gave cracking. With boric acid added, higher concentrations (1 ppm) were required. The SCC was shown to be…
Abstract An investigation was conducted to establish property‐morphology relationships in polymethylmethacrylate/polyvinylidenefluoride (PMMA/PVDF) blends. All blends were compounded in a twin‐screw extruder and then processed by injection molding Mechanical properties of blends of various compositions were studied by…
It is demonstrated that the observed production by ultrasound of stable cavitation bubbles in tissues, at the frequency and intensities used by ter Haar and Daniels, (see ibid., vol. 26, p.1145-9, 1981), can be predicted on the basis of a presently available theory concerning the growth of bubbles by rectified diffusi…