Materials Literature
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The effect of hydrogen gas on the properties of tetrahedral amorphous carbon deposited in a filtered cathodic arc has been investigated. It is shown that hydrogen flow rates of less than 0–05 s.c.c.m. give rise to an increase of 3–4% in the film density and in the sp3 content above that of the non-hydrogenated films.…
Abstract A research program at the Center for By-Products Utilization, University of Wisconsin-Milwaukee, is being conducted to develop new low-cost construction materials primarily using coal combustion by-products. This paper reports results of research performed to develop concrete mixture proportions information u…
The authors found that DTPA bis(amide) macrocycles can be prepared in reasonable yields using simple methods and readily available starting materials. Gadolinium complexation is facile and gives rise to monomeric and dimeric species. The "pocket size" influences the solid state structure of the final complex, with Gd-…
Summary Twenty-nine tests in air and 27 tests in a 3.5% NaCl solution were conducted to test the fatigue strength of Grade E 4.5-in.-OD, 16.6-lbm/ft [114-mm-OD, 24.7-kg/m] drillpipe. The effects of stress range, mean stress, corrosion, and upset geometry were tested on the drillpipe body alone and on specimens that in…
Fluorinated poly(imide-amide)s containing pendant cyano groups have been synthesized by solution polycondensation of aromatic diamines which contain cyano groups with diacid chlorides which have both hexafluoroisopropylidene and imnide groups. Thermal crosslinking of these polymers has been attempted in NMP, or by hea…
Article Dislocation Microstructure and Texture Development in Rolled Copper Single Crystals was published on June 1, 1994 in the journal International Journal of Materials Research (volume 85, issue 6).
We have previously proposed a method for depositing silicon dioxide films on Si from tetraethoxysilane (TEOS) using ultraviolet (UV) light from a low pressure mercury lamp. In the method, an organic solution which contains TEOS is spin‐coated onto a Si wafer surface to form a thin organic film which is then exposed to…
Incompresible, thin sheet flows have been of research interest for many years. Those studies were mainly concerned with the stability of the flow in a surrounding gas. Squire was the first to carry out a linear, invicid stability analysis of sheet flow in air and compare the results with experiment. Dombrowski and Fra…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermodynamics of Organic Chemical Partition in Soils. 3. Nonlinear Partition from Water-Miscible Cosolvent SolutionsFrank C. Spurlock and James W. BiggarCite this: Environ. Sci. Technol. 1994, 28, 6, 1003–1009Publication Date (Print):June 1, 1994Publication History Publishe…
Abstract Highly crystalline kaolinite has been studied by 27 Al satellite transition magic angle-spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy. This technique provides an additional narrowing of the MAS spectral lines by a factor of more than three compared with the width of the prominent central transi…
Abstract X‐ray photoelectron spectroscopy (XPS or ESCA) is one of the most common surface analytical techniques available. It has proved over many years to be invaluable in the analysis of elemental and chemical species on surfaces. The recent developments of this technique towards spatially resolved XPS information h…
Small-angle neutron scattering (SANS) and wide-angle neutron scattering (WANS) measurements on pumice, an amorphous natural aluminosilicate used as support for metals in the preparation of catalysts, are reported. The SANS spectrum indicates the presence of a broad size distribution of pores and the absence of volume…
ADVERTISEMENT RETURN TO ISSUEPREVArticleAdditions and Corrections - Oxidation of SO2 to SO3 over Honeycomb DeNoxing CatalystsJiri Svachula, Louis Alemany, Natale Ferlazzo, Pio Forzatti, Enrico Tronconi, and Fiorenzo BreganiCite this: Ind. Eng. Chem. Res. 1994, 33, 6, 1644Publication Date (Print):June 1, 1994Publicatio…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRational Solvent Selection for Cooling CrystallizationsKathryn K. NassCite this: Ind. Eng. Chem. Res. 1994, 33, 6, 1580–1584Publication Date (Print):June 1, 1994Publication History Published online1 May 2002Published inissue 1 June 1994https://pubs.acs.org/doi/10.1021/ie0003…
This paper presents the results of investigations of amorphous substances formed as a result of thermal decomposition of inorganic crystalline solid bodies by way of their structural rearrangement in a solid phase as an order-disorder transformation.The investigations were conducted on model substances represented by…
Earlier studies have shown that the presence of excess sodium in high‐level nuclear waste can give rise to increased leachability when the waste is incorporated in Synroc‐type titanate ceramics. Freudenbergite (Na 2 Al 2 Ti 6 O 16 ) can incorporate sodium and it exhibits satisfactory leaching resistance in water and r…
Abstract Darstellung und Kristallstruktur von SnTl 4 Se 3 werden beschrieben. Die Verbindung kristallisiert in der Raumgruppe P4/ncc als niedersymmetrische Verzerrungsvariante des In 5 Bi 3 ‐Typs, der selbst eine isopuntale Unterfamilie des Cr 5 B 3 ‐Typs ist: a = 852,2(2) pm, c = 1 272,2(6) pm, c/a = 1,49, Z = 4. Es…
The early stages of oxide film passivation of corroding surfaces in aluminum etch tunnels and pits were investigated. Passivation was initiated by step reductions in applied current. A mathematical model for passivation was used to predict experimentally measured potential transients during the first millisecond after…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetermination of Stereoregularity of .gamma.-Irradiation Canal Polymerized Polyacrylonitrile by 1H 2D J-Resolved NMR SpectroscopyMasatomo Minagawa, Koichi Ute, Tatsuki Kitayama, and Koichi HatadaCite this: Macromolecules 1994, 27, 13, 3669–3671Publication Date (Print):June 1…
Temperature dependences of $^{39}\mathrm{K}$ and $^{85}\mathrm{Rb}$ nuclear-quadrupole resonance frequencies have been measured in tetragonal paraelectric phases of ${\mathrm{KH}}_{2}$${\mathrm{PO}}_{4}$, ${\mathrm{KH}}_{2}$${\mathrm{AsO}}_{4}$, ${\mathrm{RbH}}_{2}$${\mathrm{PO}}_{4}$, and ${\mathrm{RbH}}_{2}$${\mathr…