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Summary This paper discusses a novel design for a rotary differential NiTi shape memory alloy actuator, which incorporates a mobile heat sink. The new mechanism is described in detail, and its performance in a position control system is compared with that of the same actuator without heat sink. Experimental results ar…
The finite-size analog of the Walgraef—Aifantis (WA) model of the “reaction + diffusion” type has been proposed to explain the size effects of dislocation patterning in fatigued metals. It has been demonstrated that the formation of certain patterns can be understood as a result of competition between the intrinsic le…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEnergy Transfer Quenching of Porous Si Photoluminescence by Aromatic MoleculesDiana L. Fisher, Jessica Harper, and Michael J. SailorCite this: J. Am. Chem. Soc. 1995, 117, 29, 7846–7847Publication Date (Print):July 1, 1995Publication History Published online1 May 2002Publish…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSr2LiSiO4F: Synthesis, Structure, and Eu2+ LuminescenceAnnapoorna Akella and Douglas A. KeszlerCite this: Chem. Mater. 1995, 7, 7, 1299–1302Publication Date (Print):July 1, 1995Publication History Published online1 May 2002Published inissue 1 July 1995https://pubs.acs.org/do…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Role of Anion in the Preparation of Nickel Catalyst Detected by TPR and FTIR SpectraSheng-Chung Ho and Tse-Chuan ChouCite this: Ind. Eng. Chem. Res. 1995, 34, 7, 2279–2284Publication Date (Print):July 1, 1995Publication History Published online1 May 2002Published inissue…
Cosublimation of 1,3- and 1,4-benzene-bis(1,2,3,5-dithiadiazolyl) and iodine/bromine affords crystals of the mixed valence salts 1,3- and 1,4-[(S2N2C)C6H4(CN2S2)][X] (X = I, Br). The crystal structures of the two iodide salts consist of perfectly superimposed stacks of molecular units with interannular spacing along t…
The different routes for the synthesis of aluminum nitride (AIN) powders are reviewed: the different industrial techniques from both the direct nitridation of aluminum metal and the carbothermal nitridation of alumina, and also other synthesis routes not industrially developed up to now. This paper presents a comprehe…
In this paper, piezoelectric properties of (Bi1/2Na1/2)1–x (Sr1/2Ca1/2) x TiO3 system were studied from the viewpoint of lead-free piezoelectric materials. To improve electromechanical properties in this system, MnO was added to this system. In the composition of x = 0.13 which was close to morphotropic phase boundary…
The operative damage mechanisms in a series of C‐matrix composites loaded in tension and shear have been investigated. The composites contained either C fibers or Nicalon fibers, both with and without a carbon coating. The matrix consisted primarily of ex‐phenolic carbon with a final carbon layer introduced by chemica…
Abstract Quantitative x‐ray analysis of spherical inclusions embedded in a matrix is not possible using the classical ZAF and ϕ(ρ)Z methods based on specimens of homogeneous composition. Gauvin et al . (1992) have demonstrated that Monte Carlo simulations can be used to perform quantitative analysis of spherical inclu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleComments on "Redox Processes on Pure Ceria and Rh/CeO2 Catalyst Monitored by X-ray Absorption (Fast Acquisition Mode)S. Bernal, J. J. Calvino, G. A. Cifredo, and J. M. Rodriguez-IzquierdoCite this: J. Phys. Chem. 1995, 99, 30, 11794–11796Publication Date (Print):July 1, 1995Publ…
The addition of sintering additives to silicon carbide particles by electrostatic adsorption of colloidal A1 2 O 3 and Y 2 O 3 sols has been studied as a way to achieve an optimum homogeneity in the microstructure. The adsorption behavior of the sol particles was examined by electrophoretic measurements and X‐ray fluo…
Abstract Monofunctional phthalocyanines 7a,b , one bearing a sulfo and the other one a carboxyl group, were synthesized by lithium alkoxyde‐catalyzed statistical tetramerization of 4‐(4‐ tert ‐butylphenoxy)‐1,2‐benzenedicarbonitrile ( 3c ) with 1,2‐dicyanobenzenes 3a,b carrying a carboxyl or sulfo group. Tribenzonapht…
Based on biochemical and ultrastructural data, hyphochytriomycetes are believed to share an ancestor with oomycetes and heterokont algae. In order to study the phylogeny of the hyphochytriomycetes, we determined both the small- and large-subunit ribosomal RNA sequence of Hyphochytrium catenoides. Phylogenetic trees we…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNovel Synthetic Routes to Carbon NitrideM. Todd, J. Kouvetakis, T. L. Groy, D. Chandrasekhar, David J. Smith, and P. W. DealCite this: Chem. Mater. 1995, 7, 7, 1422–1426Publication Date (Print):July 1, 1995Publication History Published online1 May 2002Published inissue 1 July 19…
Abstract The 2,2′-bi-1H-imidazole (H2BIM) derivatives were studied from the point of the interplay of proton-transfer (PT) and electron (charge)-transfer (CT) interactions. Seven new states among the speculated 25 independent species were identified based on the study of their redox and acid dissociation properties. I…
The influence of chirality on the nonlinear optical properties of poly(isocyanide)s is examined. It is found that the chiral and nonlinear properties can occur on different levels of the molecular structure and can therefore be separately tuned, but that they still can be coupled together. The NLO properties of chiral…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCoating Polystyrene Particles by Adsorption of Hydrophobically Modified DextranC. Fournier, M. Leonard, I. Le Coq-Leonard, and E. DellacherieCite this: Langmuir 1995, 11, 7, 2344–2347Publication Date (Print):July 1, 1995Publication History Published online1 May 2002Published…
Poly(viny1 alcohol) (PVA) and citric acid (CA) are a commonly used binder and dispersant, respectively, for aqueous Al 2 O 3 slurries. The competitive adsorption of these additives on A1 2 O 3 from aqueous solution was studied, as was the influence of this competition on the binder migration in centrifugally cast comp…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfrared spectroscopy and vibrational relaxation of CHx and CDx stretches on synthetic diamond nanocrystal surfacesH.-C. Chang, J.-C. Lin, J.-Y. Wu, and K.-H. ChenCite this: J. Phys. Chem. 1995, 99, 28, 11081–11088Publication Date (Print):July 1, 1995Publication History Publ…