Materials Literature
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The detailed nitrogen adsorption isotherms of activated carbon fibres (ACFs) and molecular sieving carbons (MSCs) at 77 K with or without pretreatment have been gravimetrically measured using a computer-controlled apparatus. These microporous carbons have also been examined by powder XRD; the crystallite size and crys…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChain length and the cosolubility of n-paraffins in the solid stateDouglas L. DorsetCite this: Macromolecules 1990, 23, 2, 623–633Publication Date (Print):January 1, 1990Publication History Published online1 May 2002Published inissue 1 January 1990https://pubs.acs.org/doi/10…
The B2\ ightleftarrowsB19 and B19\ ightleftarrowsB19′ transformations in a ternary 50Ti-40Ni-10Cu (at.%) alloy were investigated by means of electrical resistivity measurements, differential scanning calorimetry and constant load thermal cycling tests, and they were compared with the B2\ ightleftarrowsR and B2\ ightle…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEvolution of structure and viscoelasticity in an epoxy near the sol-gel transitionDouglas Adolf, James E. Martin, and Jess P. WilcoxonCite this: Macromolecules 1990, 23, 2, 527–531Publication Date (Print):January 1, 1990Publication History Published online1 May 2002Published…
Abstract
In the phase transition from the paraelectric smectic A to the antiferroelectric SmC A * phase via the ferroelectric SmC * phase in MHPOBC, the existence of a subphase, SmC α * , between SmA and the normal SmC * (SmC β * ) was confirmed in addition to that of another subphase, SmC γ * , between SmC * and SmC A * by me…
Instrumental settings for determination of illite/muscovite ‘crystallinity’(half‐height width of the 10‐Å X‐ray diffraction peak) and the limits of the anchimetamorphic zone adopted by various authors fall into several groups. The variation in the limiting peak widths between the authors that have adopted Kubler's Neu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanisms of reactions of iron(III) porphyrins with hydrogen peroxide and hydroperoxides: solvent and solvent isotope effectsTeddy G. Traylor and Feng XuCite this: J. Am. Chem. Soc. 1990, 112, 1, 178–186Publication Date (Print):January 1, 1990Publication History Published o…
Diamondlike a-C:H films have been deposited by plasma decomposition of C2 H2. 50 samples were prepared with a systematic variation of the deposition parameters: the substrate bias voltage was between −100 and −1400 V and the C2 H2 gas pressure was between 4×10−4 and 2.6×10−1 mbar. The following properties of the films…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT.beta.-Agostic interactions in (C5H4Me)2Zr(CH2CH2R)(PMe3)+ complexesRichard F. Jordan, Prudence K. Bradley, Norman C. Baenziger, and Robert E. LaPointeCite this: J. Am. Chem. Soc. 1990, 112, 3, 1289–1291Publication Date (Print):January 1, 1990Publication History Published on…
Electron-beam deposition inside scanning electron microscope (SEM) is used to prepare a new scanning tunneling microscope (STM) tip [electron-beam deposited (EBD) tip] which has a submicron diameter and a long straight sidewall. An EBD tip as small as less than 0.1 μm in diameter can be formed with careful beam focusi…
The topological and chemical long range orders in the icosahedral Al 65Cu20Fe15 alloy have been studied by X-ray powder diffraction. The spectacular enhancement of the quasicrystal-line state by annealing of rapidly quenched samples have been quantitatively measured showing that the final annealed product fits the the…
The Ti-15-3 metal matrix composites containing silicon carbide (SCS6) fibers, in five different lay-ups, have been tested at room temperature to determine static strengths and mechanical properties. Experimental data and predicted values of the laminate properties and strengths showed good correlation. The off-axis la…
A thermodynamically stable quasicrystalline phase with an icosahedral structure was found to be formed at atomic compositions of Al70Pd20Mn10 and Al70Pd20Re10 in conventionally solidified and fully annealed states as well as in a rapidly solidified state. The substitution of Mn by Re leads to an increase in the intens…
The authors have studied the feasibility of using ferroelectric materials as the capacitor dielectric in the one-transistor memory cells for 64-Mb and 256-Mb DRAMs. They have performed an intensive literature search and analysis. They discuss the crystal structure of the materials reviewed, their hysteresis curve, tem…
The effect of Si addition on the nucleation and growth of the grain boundary cell in a Cu-10%Ni-8%Sn alloy on aging at 723 K after quenching from 1123 K were investigated by means of hardness measurements, optical and electron microscopic observations, and X-ray analysis. The addition of Si retarded the precipitation…
The purpose of this paper is to investigate the influence of grain size and temperature on fracture toughness of MgO sintered bodies, Specimens were made by hot pressing, and a wide range of grain size (12-230μm) was obtained by annealing at high temperatures. Porosities of specimens were less than 1%. Fracture toughn…
The present study aims to assess whether the smectite‐rich Cochin and Mangalore clays, which were deposited in a marine medium and subsequently uplifted, exhibit consistency limits response typical of expanding lattice or nonexpanding (fixed) lattice‐type clays on artificially changing the chemical environment. The ch…
Thermophysical and kinetic properties of the LaNi5-H2 system are investigated for the practical utilization of hydriding alloys. The measurements of the thermophysical properties are carried out by a transient hot-wire method along the P-C isotherms. The effective thermal conductivities of the system increase not only…
The first magneto-optical study of the 4 A 2g → 2 T 2g absorption, 2 E g → 4 A 2g and 2 T 2g → 2 T 1g, 2 E g luminescences of MoCl3- 6 in Cs2NaYCl6, as well as the absorption spectrum of the spin-allowed 4 T 2g and 4 T 1g ligand field states, are reported. Magneto-optical methods have allowed difficulties in a previou…