Materials Literature
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We investigate the feasibility of applying a recent algorithm for sampling activation barriers in supercooled liquids to probe activated kinetics of solid-state deformation under stress. The basis for exploring this isomorphism is that the elementary processes of activation and relaxation in potential energy space are…
Understanding the transport properties of a porous medium from a knowledge of its microstructure is a problem of great interest in the physical, chemical, and biological sciences. Using a first-passage time method, we compute the mean survival time tau of a Brownian particle among perfectly absorbing traps for a wide…
Controlled copper evaporation at attogram level from individual carbon nanotube (CNT) vessels, which we call nanotube boilers, is investigated experimentally and theoretically. We compared the evaporation modes induced by electric current, Joule heating, charge, and ionization in these CNT boilers, which can serve as…
An analytical model for the pyroelectric (PY) effect under open circuit condition and 2-2 connectivity laminates of various pairs of PY and nonpyroelectric (NP)/elastic materials has been developed. It is evident from our analysis that there indeed is a substantial dissimilarity between the PY coefficients and figure…
Results are presented from experimental studies of a multipoint negative corona in an atmospheric-pressure argon flow. It is shown that a decrease in the interpoint distance, gas circulation through the discharge gap, and the adjustment of ballast resistances in the corona supply circuit allow one to stabilize the dis…
Samples of multiblock poly(ether-ester) copolymer doped with magnetic ?-Fe2O3 nanoparticles (at small concentrations of 0.1 wt. % and 0.3 wt. %) have been investigated by DSC method to study the melting and crystallization behavior. Two forms of magnetic ?-Fe2O3 nanoparticle filler were used: solid-state grains and a…
Natural Ester seed oil is a biodegradable fluid that is increasingly being used as a replacement for mineral oil and for high temperature flashpoint liquids, including silicone and RTEMP. Considerable studies have been conducted to investigate heat aging performance of cellulose, electrical contact, thermal stability,…
Authors have been studying the adsorption or/and desorption behavior of H2 or/and D2 with synthetic zeolite packed-beds under the cryogenic condition of liquid nitrogen temperature, aiming at developing a pressure swing adsorption (PSA) process of hydrogen isotope separation useful for tritium processing in fusion fue…
PolyGlycopleX (PGX), a novel dietary fiber, produces no mutagenic effects in bacterial tester strains Salmonella typhimurium TA 98, TA 100, TA 1535, and TA 1537 and Escherichia coli WP2 uvrA at concentrations of 0.316, 1.00, 3.16, 10.0, 31.6, and 100 microg/plate. No biologically relevant increases in revertant coloni…
Various methods for the preparation of vanadium-phosphorus oxide (VPO) catalysts supported on aerosils A-300 and A-50 and TiO 2 were studied: a traditional method (in an organic solvent under varying the support addition time, the nature of the reducing agent, and the degree of reduction of vanadium oxide) and barothe…
Light weight complex metal hydrides, sodium hydride (NaH), and lithium hydride (LiH) are the last step materials during hydrogen release process of alanates and borates, which are promising candidates for hydrogen storage. We report ab initio molecular dynamics (MD) calculations based on density functional theory to s…
Abstract An der warmaushärtenden Aluminiumlegierung EN AW‐6060 wurden Untersuchungen zum Rissfortschritt und zur Ermüdung nach hochgradig plastischer Verformung durch ECAP (Equal‐Channel Angular Pressing) durchgeführt. Es wurden Zustände in unterschiedlichen Stadien der Mikrostrukturfeinung und Verformungsverfestigung…
Abstract This paper presents the results of a study on mechanical properties and microstructure in a SS316 wrapper irradiated in a 40MWt/13MWe fast breeder test reactor at Kalpakkam, India. Transmission electron microscopy (TEM) examination and mechanical property evaluation were carried out on the hexagonal wrapper s…
The effects of thermal aging at a temperature range of 823 to 973 K on the mechanical properties and microstructure of JLF-1 and CLAM steels were investigated. The results showed that the hardness increased slightly and the creep properties improved after aging at 823 K for 2000 h, suggesting that strengthening occurr…
Poly (acrylonitrile-co-methyl acrylate) copolymer and P(AN-co-MA)/sodium silicate (SS) nanocomposite were synthesized via non-conventional emulsion method using an in situ transition metal complex Co(II)/EDTA and ammonium persulfate (APS) as initiator. The copolymer and nanocomposite so obtained were characterized and…
Extended abstract of a paper presented at Microscopy and Microanalysis 2009 in Richmond, Virginia, USA, July 26 – July 30, 2009
Aiming to structurally and functionally replace missing or damaged tissues, regenerative medicine can offer revolutionary therapeutical solution in addressing musculoskeletal conditions. Translation from basic research to affordable cost effective therapeutic procedures implies using advanced robotic and automatized t…
A new method is proposed for calculating the effective constitutive parameters of small-period 2D lattices. A two-element lattice of resonance chiral cylindrical scatterers with the opposite signs of chirality is investigated. It is found that such a structure exhibits the properties of the Veselago medium in a narrow…
Here in this work, the hot filament chemical vapor deposition method is adopted, with an extra heating stage is employed as well, to control the substrate temperature precisely. Since this method, different kinds of WO3nano-structure arrays were prepared, and their FE properties were studied.
A novel method, installing the rubber sheath on power transmission line near the insulator string to improve the performance of external insulation of line insulator, was proposed in this paper. The physical model of line insulator and transmission line installed the rubber sheath was shown, and the calculation formul…