Materials Literature
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The equations of state and phase stability of calcium chalcogenides, CaS, CaSe and CaTe are investigated via first principles theoretical calculations. We report results of the structural properties of these compounds in the B1(NaCl) and the B2(CsCl) phases, the theoretical transition pressure and the volumes compress…
Magnetization, susceptibility, and specific heat measurements were made on a single crystal of La 0 . 7 5 Sr 0 . 2 5 MnO 3 . The ferromagnetic-to-paramagnetic phase transition was found at 346 K and four critical exponents were measured as: α=0.05′0.07, β=0.40′0.02, γ=1.27′0.06, and δ=4.12′0.33. The values of critical…
The rate of radula production in the chiton Acanthopleura hirtosa (Blainville, 1825) was determined by following structural irregularities induced in the radula using a cold-shock treatment of 4°C for 48 h. In animals treated in this manner and subsequently maintained in an artificial intertidal habitat to ensure, as…
Here the author outlines only a few nanoscale phenomena that adversely affect thermal conductivity and can complicate heat removal from nanoscale electronic devices. Since progress in the electronic industry is largely associated with device down-scaling, he considers that research on this subject is worth pursuing.
Five isomeric β,β′-diformyl-meso-tetraphenylporphyrins, and the corresponding nickel complexes, were synthesised, separated and fully characterised by NMR.
In this paper the design and the manufacture of a 3-dof (degrees of freedom) robot driven by shape memory alloys (SMA) is presented. This robot has a parallel structure including a fixed plate and a moving plate. The plates are linked together by 3 SMA wires and a mechanical spring is located in the central part. Poss…
In the last phase of the core degradation, an oxidic melt pool of mainly UO2, ZrO2, and unoxidized Zircaloy and stain-less steel will form in the lower head of the RPV (Theofanous et al., 1996). A molten metal layer (composed mainly of Fe and Zr) will rest on the top of the crust of the oxidic pool. A thin oxidic crus…
In order to improve initial activation properties of TiFe alloy, simple ion implantation and ion mixing with the deposition of LaNi5 were carried out at room temperature. The results show that argon-ion mixing caused extensive improvement of initial activation, wherein hydrogenation was easily effected at 373 K and 1…
The new compound [Co(η5-C5H5)(dppf-P,P′)I]I, 1, was synthesised by the stoichiometric reaction of the Co(III) complex [Co(η5-C5H5)(CO)I2], 2, with 1,1′-bis(diphenylphosphino)ferrocene (dppf) in CH2Cl2, and was characterised by multinuclear NMR spectroscopy. Exposure to air of THF or CH2Cl2 solutions of compound 1 gave…
The following topics are dealt with: thermal phenomena; air cooling limits; advanced simulation methods for electronics cooling; compact models; integrated biochips; MEMS; thermal management; power electronics systems; convection cooling; heat pipes; heat sink characterization; high flux liquid cooling; thermal CAD; c…
The effect of the alloy compositions on the cyclic bending fatigue behaviors of the Ti–Ni base shape memory alloy wires was investigated using a rotary bending fatigue tester specially designed for wires. The fatigue test results were discussed in connection with the static tensile properties. The results were summari…
Alkylation of pyridine by methanol to methylpyridines has been studied in the vapour phase in a fixed bed reactor, in the temperature range 473–723 K over the Zn1 − xMnxFe2O4 (x = 0, 0.25, 0.50, 0.75 and 1) ferrospinel system. 2-Picoline and 3-picoline were found to be major products. It was observed that, systems pos…
Mechanisms Of Mineral Scale Inhibition M.B. Tomson; M.B. Tomson Rice University Search for other works by this author on: This Site Google Scholar G. Fu; G. Fu Rice University Search for other works by this author on: This Site Google Scholar M.A. Watson; M.A. Watson Rice University Search for other works by this auth…
The performance of supported platinum as an anode catalyst in a hydrogen sulfide solid oxide fuel cell with yttria-stabilized zirconia (YSZ) as the electrolyte has been examined in the temperature range of 700-900°C. The highest current density achieved at 800°C was 100 mA/cm 2 and the highest power density was 15.4 m…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation David I. Poston, Richard J. Kapernick, Ray M. Guffee, Robert S. Reid, Ronald J. Lipinski, Steven…
An investigation was conducted on the use of rattan (cane) furniture waste as furnish material for the manufacture of cement-bonded particleboard (CBP). Laboratory scale CBPs were fabricated from hot water pretreated chopped strands of mixed rattan waste obtained from rattan furniture workers in Ibadan, Oyo State, Nig…
Changes in fracture and hydrogen evolution behaviors in Cu-added ultra low carbon steels due to hydrogen charging were examined by small punch (SP) tests and thermal desorption spectroscopic (TDS) analyses, respectively, to understand effect of morphology of copper precipitation particles on susceptibility to hydrogen…
The purpose of this study was to evaluate the effect of sodium content on the crystallization behavior of glass-ceramics in the system SiO(2)-MgO-CaO-Na(2)O-K(2)O-F. Five glass compositions were prepared with increasing sodium content. The compositions were melted at 1400 degrees C for 2 h and cast into 60 x 12-mm ing…
Nanocomposites are expected to exhibit new and improved properties when compared to their microcomposite counterparts. By lowering the particle size to nanodimensions (<100 nm), the special effects in polymer composites appear. In this study we compared the properties of composites filled with micro- and nano-sized ca…
A wide range of different space nuclear systems are currently being evaluated as part of the DOE Special Purpose Fission Technology program. The near-term subset of systems scheduled to be evaluated range from 50 kWe gas-, pumped liquid metal-, or liquid metal heat pipe-cooled reactors for space propulsion to 3 kWe he…