Materials Literature
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Experimental sintering studies On undoped and cao‐doped Mgo powder compacts in Static air and flowing Water Vapor atmospheres were conducted at 1230° to 1600°C. Corresponding microstructural changes of specimens during sintering were examined by scanning electron microscopy. Kinetic and microstructural data were analy…
Abstract K 2 Sb 4 S 7 · H 2 O crystallizes in the triclinic system with a = 1171.4(5) pm, b = 952.0(5) pm, c = 715.6(5) pm and α = 99.36(5)°, β = 86.80(5)°, γ= 103.48(5)°. One half of the Sb atoms has three sulfur neighbours forming with the free electron pair a ψ-ShS 3 tetrahedron, while the other half is coordinated…
For safety and convenience, ultrasonic corona sensors are mounted on the outer surface of power transformer tanks, and consequently, can only receive ultrasound from internal electrical discharges after attenuation through the oil and tank wall. In order to reduce this attenuation and maximize the detected signal, it…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMicrostructure of Poly(2-phenylbutadiene) Prepared by Anionic InitiatorsToshimitsu Suzuki, Yasushi Tsuji, Yoshinobu Takegami, and H. James HarwoodCite this: Macromolecules 1979, 12, 2, 234–239Publication Date (Print):March 1, 1979Publication History Published online1 May 200…
Four patients on long-term follow-up for Hippel-Lindau syndrome (HLS) are presented. All had undergone nephrectomy for renal carcinoma; in 2, carcinoma subsequently developed in the remaining kidney. Because of the tendency of these tumors to develop bilaterally, wide local resection is preferable to radical nephrecto…
Results of experimental and theoretical studies of solid oxygen are presented. The orientational structure and thermal expansion have been studied for all three crystal modifications. Magnon and libron excitation spectra have been calculated. Based on the analysis of structural, thermodynamic, spectral, and magnetic p…
The results of elastic polarized neutron diffuse scattering measurements on two bcc Fe-Cu alloys with 3.89 at % and 6.29 at % of Cu are reported. The magnetic diffuse cross section is strongly peaked at low values of scattering vector k indicating a strong magnetic moment disturbance extended fairly in the space up to…
The elastostatic problem for an infinite orthotropic strip containing a crack is considered. It is assumed that the orthogonal axes of material orthotropy may have an arbitrary angular orientation with respect to the orthogonal axes of geometric symmetry of the uncracked strip. The crack is located along an axis of or…
Abstract Dynamic mechanical measurements on ultrahigh modulus polyoxymethylene have been undertaken over the temperature range −150 to 20°C. Measurements of the longitudinal crystal modulus have also been made by studying changes in the (009) reflection with load, over a similar range of temperatures. The dynamic Youn…
The diffusion coefficient of aluminium atoms in migrating grain boundaries in Ni-Al alloys is observed to be three orders of magnitude higher than the corresponding values in stationary boundaries of the same material. This result may be understood if it is assumed that the diffusion in migrating boundaries occurs by…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural and magnetic properties of dimeric di-.mu.-chloro-tetrakis(ethylenediamine)dinickel(II) chlorideK. O. Joung, C. J. O'Connor, E. Sinn, and R. L. CarlinCite this: Inorg. Chem. 1979, 18, 3, 804–808Publication Date (Print):March 1, 1979Publication History Published on…
Abstract Na 3 Cu 4 S 4 can be prepared by fusion reaction of copper with Na 2 CO 3 and sulfur at 600 °C. The structure (orthorhombic, Pbam, a= 14,624(6), 6 = 7,163(3), c = 3,771(1)Å; Z = 2) solved from x-ray diffractometer data (R = 0,024; 391 obs. reflections) shows unlinked copper-sulfur chains of the kind already o…
The hot-deformation behaviour of a cold-rolled Zr-bearing Al-Mn alloy and a commercial superplastic Al-Cu-Zr alloy has been investigated. During hot-deformation the subgrain size increased while the density of Al3Zr particles decreased with increasing strain. The decrease in particle density was caused by a discontinu…
Electrochemically controlled test methods have been used to determine the influence of thermal treatment on the stress corrosion cracking (SCC) resistance of Inconel alloy 600 (I-600) in deaerated 10% NaOH solutions at 315 C (600 F). Maximum susceptibility to SCC was observed when the electrode potential of the I-600…
Abstract Polytungstates are obtained by the reaction of hydrated tungsten (VI) oxide with bases or salts after occasional addition of organic solvents. With liquid ammonia the as yet unknown ditungstate, (NH 4 ) 2 W 2 O 7 , is produced. Its IR spectrum has few absorption bands suggesting a very simple constitution. Pi…
Abstract The theory developed in Part I of this series is modified to accommodate polymers that possess closely spaced, bulky side groups on the chains. The side groups give rise to free space between the chain “cores,” which reduces the chain separation required for penetrant motion transverse to the local chain axis…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTColloid Titration Behavior of Poly(ethyleneimine)Etsuo KokufutaCite this: Macromolecules 1979, 12, 2, 350–351Publication Date (Print):March 1, 1979Publication History Published online1 May 2002Published inissue 1 March 1979https://doi.org/10.1021/ma60068a043RIGHTS & PERMISSI…
Abstract The heat capacities of water swollen poly[2‐(2‐hydroxyethoxy)ethyl methacrylate] were determined in a DSC‐2 calorimeter within the temperature range 220–350K for concentrations from 0 to 1,2g of water per 1g of the polymer. At temperatures above 0°C the partial specific heat capacity of water in gel is concen…
We have used elastic neutron scattering to examine the effect of hydriding on the sublattice magnetization of the Laves-phase compounds RFe2 for R=Ho and Er. On addition of hydrogen or deuterium a stable phase of composition about RFe2D3.5 is formed. The pure compounds RFe2 are ferrimagnetic, with the R moment equal t…
The complexes Ph3ERe(CO)3( ,10-phenanthroline) (E = Sn, Ge) exhibit optical emission (approx. 750 nm) from the lowest excited state in CH2Cl2/CCl4 solutions at 298deg. K and also give E-Re bond cleavage (Phi approx. 0.25) upon photoexcitation under the same conditions. Both the relative emission quantum yield and the…