Materials Literature
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Hillock formation on Pt bottom electrode surfaces has been investigated for 〈111〉 Si and sapphire substrates. This paper correlates the electrical performance of Pt/PZT/Pt structured capacitors with the observed surface roughness and/or hillock presence on the Pt bottom electrode.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReassessment of Khazanovich's Theory of Thermal Diffusion of Polymers in SolutionMichael BenderCite this: Macromolecules 1995, 28, 4, 1309–1311Publication Date (Print):February 1, 1995Publication History Published online1 May 2002Published inissue 1 February 1995https://pubs…
The purpose of this presentation is to provide some perspective gained from recent studies in condensed matter physics on the microscopic processes by which martensitic transformations take place to supplement the highly developed crystallographic and thermodynamic descriptions. Atomic scale dynamics can be related to…
A simple method for the preparation of monophasic β‐SiAlON using nitridation of Si and AIN with an oxygen partial pressure of 10 ‐4 atm is described. The effect of the AIN/Si ratio in the initial mixture on the formation of β‐SiAlON is discussed. The likely mechanism of the formation of β‐SiAlON is outlined.
<div class="htmlview paragraph">The accuracy of an accident reconstruction is dependent upon the availability and quality of relevant data. Often by the time an engineer is asked to reconstruct a traffic accident the only source of scene data is a police report. Important scene data, such as the point of impact…
Abstract The local structure in crystals, melts, supercooled melts, and glasses of sodium silicate hydrates of composition Na 2 O · SiO 2 · nH 2 O (n = 9, 6, 5) is studied by variable temperature 1 H, 23 Na, and 29 Si MAS NMR spectroscopy. Detailed in situ investigations on the melting process of the crystalline mater…
Fichtelite, C 19 H 34 , is a saturated hydrocarbon mineral that is monoclinic, space group P2 1 , with a 10.706(4), b 7.458(2), c 10.824(7) Aa, beta 105.85(3) degrees , V 831.4(8) Aa 3 , Z = 2. Its structure was determined by direct methods using 1105 observed reflections [F> or =3sigma F ], with a full-matrix least-s…
We propose a 3-state spin model to simulate the martensitic transition (MT) between austenite (S = 0) and two different, twin-related, martensitic phases (S = &I).The system can be driven by two fields: A plays the role of temperature (drives the thermallyinduced transition) and H plays the role of an uniaxial stress.…
3,3′,4,4′-Biphenyltetracarboxylic dianhydride (BPDA) was investigated as the central core unit in mesogenic molecules. Of particular interest was whether the BPDA unit could be self-constrained into a trans-conformation, and thus organize into a liquid crystalline phase. Two homologous series of symmetrical substitute…
In this paper, results from static tests have been used to establish scale inhibitor adsorption mechanisms and levels in consolidated reservoir cores and to rank inhibitors for their adsorption behaviour and, in some cases, squeeze return lifetimes. The purpose of this rapid and simple type of bulk adsorption measurem…
The effect of three different electrolytes on the efficiency of polypyrrole deposition was studied using Rutherford backscattering spectrometry (RBS). The RBS results were used to determine the thickness, roughness, and composition of the polypyrrole films. The films were deposited from aqueous solutions of sodium per…
Icosahedral alloy Al86Cr8Fe6 and its crystallization products have been studied with X-ray diffraction, differential scanning calorimetry, 57Fe Mössbauer spectroscopy, and magnetic susceptibility methods. The presence of a multiplicity of Fe sites is demonstrated, and this is interpreted as evidence of intrinsic disor…
We present experimental studies of magnetization of Pb1x CrxTe (x < 0.01) crystals. The reasonable description of the data is obtained for a composition of x < 0.001 using Cr+++ model (Brillouin type paramagnetism S = 3/2).
We report high pressure studies on a binary system of 4-(2′-methyl butyl)phenyl 4′-n-octyl biphenyl-4-carboxylate (CE8 from BDH) and 4-n- dodecyloxy biphenyl-4′-(2′-methyl butyl)benzoate (C12). For the concentration range 0.32<X<0.62, where X is the weight fraction of C12, the system shows the following sequence of tr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUse of Oscillating Gas Jets in Fiber ProcessingManoj K. Tyagi and Robert L. ShambaughCite this: Ind. Eng. Chem. Res. 1995, 34, 2, 656–660Publication Date (Print):February 1, 1995Publication History Published online1 May 2002Published inissue 1 February 1995https://pubs.acs.o…
A previously presented model is used to simulate the dynamics and microstructure of spatially invariant uniaxial discotic nematic liquid crystals in isothermal, incompressible, irrotational, extensional (shear-free or elongational) flows. Numerical and analytical solutions of the director n and alignment S are present…
A new series of high temperature copper based shape memory alloys has recently been patented. These alloys contain 8-20 wt% Al, 1-20 wt% Ag, 0-2 wt% of a minor element (preferably Co), balance c2pper. The martensitic start transformation temperatures of these alloys are above 200 C and, in some cases, they have good h…
Software has been developed which applies group-theoretical methods to the calculation of phonon spectra. The software draws on a large data base which includes information on each of the 230 crystallographic space groups and their irreducible representations. The software finds the optimal phonon modes for the frozen…
The pyroelectric properties of ferroelectric liquid crystal (FLC) cells possessing helical and surface stabilized structures have been investigated. Pyroelectric properties of a FLC cell depend on the applied voltage, the internal smectic layer structure, and the ratio of the cell thickness to the material pitch d/p0.…
We study radially symmetric stationary points of the functional where u denotes the density of a fluid confined to a container Ω, W(u) is the course-grain free energy and ε accounts for surface energy. Under the further assumption of small energy, that is for small ε, we prove existence of precisely two solutions for…