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。
Very low tolerable partial pressures of H2S (pH2S ) have been reported for duplex stainless steels in sour environments. However, such steels resist stress corrosion cracking (SCC) in sour environments even at substantial pH2S values. To assess the limits of applicability, SCC tests should include an environment of re…
The conformational stabilities of native pig citrate synthase (PCS), a recombinant wild-type PCS, and six active-site mutant pig citrate synthases were studied in thermal denaturation experiments by circular dichroism and in urea denaturation experiments by using DTNB to measure the appearance of latent SH groups. His…
Submerged arc welds of a 22Cr–3Mo–8Ni (wt-%) duplex stainless steel were aged in the temperature range 400–600°C to simulate stress relieving conditions of mild steel. Particular attention was paid to the relationship between toughness and microstructure. It was concluded that sufficient toughness could be obtained on…
Abstract For corrigendum see DOI: 10.1002/anie.199113862
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of hydrogen bonding on the melting point depression in polymer blends where one component crystallizesPaul C. Painter, Suresh L. Shenoy, Dorab E. Bhagwagar, Jim Fishburn, and Michael M. ColemanCite this: Macromolecules 1991, 24, 20, 5623–5629Publication Date (Print):S…
BaTiO 3 thin films were prepared on MgO(100) substrates by chemical vapor deposition using barium β-diketonate {Ba(C 11 H 19 O 2 ) 2 } and titanium tetraisopropoxide {Ti[OCH(CH 3 ) 2 ] 4 } as metalorganic precursors. BaTiO 3 films deposited at 800-1000°C showed prominent a -axis orientation perpendicular to the substr…
The tin and zinc effect on the aluminum activation process produced in the Al-5%Zn-0.1 %Sn alloy in aggressive media was analyzed. Potentiostatic, galvanostatic, and potentiodynamic polarizations, electron microscopic observations, and energy-dispersive x-ray (EDX) analysis were used to analyze the generated attack. T…
Abstract Smectites in the montmorillonite-beidellite pseudo-binary system were synthesized from glass at the hydrothermal conditions 100 MPa and 250–500°C. Products were analysed by X-ray powder diffraction for randomly oriented and glycolated samples, and also according to the Greene-Kelly test. A new mixed-layer min…
SUMMARY Neither the specific surface area values (from N 2 sorption) nor the ethylene glycol monoethyl ether (EGME) retention values of 21 soil samples from New Zealand and Fiji could all be accounted for by the sum of the contributions from their component minerals. Much EGME is probably retained by internal surfaces…
Abstract Structural features of very highly disordered 2:1 trioctahedral phyllosilicates from the Madrid Basin have been studied. Application of Fourier methods to XRD patterns shows that these materials consist of random kerolite-stevensite mixed-layered phases (R = 0) with 50–80% kerolite layers, and have a very sma…
Transparent and optical-grade TiO(2) coatings were prepared by sol-gel spinning and ion-beam sputtering techniques. We investigate process parameters for the fabrication of sol-gel spin-coated TiO(2) films exhibiting high optical quality comparable with that of ion-beam-sputtered TiO( 2) films. X-ray diffraction studi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHeterojunctions formed from phthalocyanine and perylene thin films: photoelectrochemical characterizationJ. Danziger, J. P. Dodelet, P. Lee, K. W. Nebesny, and N. R. ArmstrongCite this: Chem. Mater. 1991, 3, 5, 821–829Publication Date (Print):September 1, 1991Publication His…
We study polymerized membranes with quenched random internal disorder, caused by impurity-induced fluctuations in the preferred metric. Although the flat phase characteristic of pure systems persists when the disorder is weak, membranes are destabilized by a disorder-induced softening of the bending rigidity at zero t…
Structural phase transitions which involve the generation of lattice strain (i.e. in ferroelastic and co-elastic crystals) are reviewed. Landau–Ginzburg theory is found to lead to an appropriate description of order parameters following the theoretical predictions over large temperature intervals. A quantum extension…
An experiment on admittance spectroscopy was performed on the ZnO-Ag alloy diodes, in which Ag was thought to diffuse into the ZnO crystal. It was found that Ag behaved as an acceptor in ZnO. Its energy level was 0.23 eV below the conduction band, and the electron capture cross section was about 6×10 -16 cm 2 .
An accurate knowledge of electron stopping power is important for calculations and simulations of electron beam interactions with solids especially in the low energy region (< 10 keV). This paper describes a simplified and rapid experimental procedure using based on electron energy loss spectroscopy which permits accu…
Abstract The addition of β‐cyclodextrin to a solution containing β‐benzyloxy‐α‐propionic‐substituted DOTA‐ and DTPA‐Gd(III) complexes leads to the formation of inclusion compounds whose equilibrium constants have been determined by NMR titrations. The main effect associated with the formation of this ‘host‐uest’ inter…
Abstract The lack of polar groups in thermoplastics (e.g., in polystyrene) provides low adhesion with cellulosic fibers. To improve compatibility between reinforcement and matrix, maleic anhydride (MA) was selected as a coupling agent for wood fiber‐filled polystyrene composites. In general, the mechanical properties…
Abstract A mathematical model is developed to describe the dynamic and pseudosteadystate behavior of chemical vapor infiltration, a process used to fabricate fiber‐reinforced ceramic matrix composites. The three‐parameter dusty‐gas model is used to describe the interaction of mass transport fluxes, partial pressures,…
Mineralogical data, thermodynamic stability (Pourbaix) diagrams, and the simplexity principle for precipitation reactions were used to evaluate corrosion product mineralogy on copper alloys exposed to sulfate-reducing bacteria. The formation of copper sulfides as corrosion products in natural surface environments is s…