Thermophysical Properties and Thermodynamic Stability of Zirconium Carbide as a Function of Non-stoichiometry PDF Download
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Languages : en
Pages :
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Languages : en
Pages :
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Author: B. D. Pollock
Publisher:
ISBN:
Category : Thermodynamics
Languages : en
Pages : 24
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Publisher: Elsevier
ISBN: 0080457533
Category : Science
Languages : en
Pages : 545
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This volume is part of the series on "Chemical Thermodynamics", published under the aegis of the OECD Nuclear Energy Agency. It contains a critical review of the literature on thermodynamic data for inorganic compounds of zirconium. A review team, composed of five internationally recognized experts, has critically reviewed all the scientific literature containing chemical thermodynamic information for the above mentioned systems. The results of this critical review carried out following the Guidelines of the OECD NEA Thermochemical Database Project have been documented in the present volume, which contains tables of selected values for formation and reaction thermodynamical properties and an extensive bibliography.* Critical review of all literature on chemical thermodynamics for compounds and complexes of Zr.* Tables of recommended Selected Values for thermochemical properties* Documented review procedure* Exhaustive bibliography* Intended to meet requirements of radioactive waste management community* Valuable reference source for the physical, analytical and environmental chemist.
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Category : Nuclear energy
Languages : en
Pages : 1292
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Author: Kevin M. Fox
Publisher: John Wiley & Sons
ISBN: 0470930977
Category : Technology & Engineering
Languages : en
Pages : 312
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The Materials Science and Technology 2009 Conference and Exhibition (MS&T’09) was held October 25-29, 2009, in Pittsburgh, Pennsylvania. A major theme of the conference was Environmental and Energy Issues. Papers from three of the symposia held under that theme are included in this volume. These symposia include Materials Solutions for the Nuclear Renaissance; Green Engineering and Environmental Stewardship; and Nanotechnology for Energy. These symposia included a variety of presentations with sessions focused on sustainable energy, photovoltaics, nanowires and composites, energy harvesting, catalysts, thin films, corrosion, nuclear fuels, materials in aggressive environments, glass and ceramics for waste disposition, modeling and thermal properties, and education. Also included was a series of invited presentations and an international panel discussion on cement waste forms. The Green Engineering and Environmental Stewardship symposium was sponsored by the Nuclear and Environmental Technology Division (NETD) of The American Ceramic Society while the Materials Solutions for the Nuclear Renaissance symposium was sponsored by NETD and ASM International.
Author: T. F. Connolly
Publisher: Springer Science & Business Media
ISBN: 1468462040
Category : Science
Languages : en
Pages : 219
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responsibility.) To Betty Edwards and Emily Copenhaver my thanks for what must have seemed endless typing, retyping and correcting of these bibliographies over a span of years. Availability of Documents U. S. Government contractor reports, usually identified by an alpha-numeric report number, can be purchased from National Technical Information Service U. S. Department of Commerce Springfield, Virginia 22151 and, often, on request from the issuing installation. USAEC reports are also available from International Atomic Energy Agency Kaerntnerring A 1010 Vienna, Austria National Lending Library Boston Spa England Monographs and reports of the National Bureau of Standards are for sale by Superintendent of Documents U. S. Government Printing Office Washington, D. C. 20402 Theses, listed as Dissertation Abstracts + number, are available in North or South America from University Microfilms Dissertation Copies P. O. Box 1764 Ann Arbor, Michigan 48106 and elsewhere from University Microfilms, Ltd. St. John's Road Tylers Green Penn, Buckinghamshire England Other Information Centers and New Journals New journals Information centers Field and and other sources serials Ultra purification 4, 8, 11, 13, 15, 16,19, 20, 9,11,15, 24, 31, 32 and 21, 28, 30, 32, 33, 42, 58, 59 crystal growth ix Preface Field Information centers New journals and and other -sources serials Characterization Miscellaneous 3,4, 8, 11, 13, 16, 19, 20, 1,3,4,8,11,15,17, 21, 26, 28, 30, 31, 32, 33, 35, 24, 25, 28, 29, 30, 31, 37, 38, 39, 40, 42, 46, 53, 56, 32 58, 60, 61, 62
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ISBN:
Category : Aeronautics
Languages : en
Pages : 1040
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Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
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Languages : en
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Abstract: Mechanical, electronic, and thermodynamic properties of zirconium carbide have been systematically studied using the ab initio calculations. The calculated equilibrium lattice parameter, bulk modulus, and elastic constants are all well consistent with the experimental data. The electronic band structure indicates that the mixture of C 2p and Zr 4d and 4p orbitals around the Fermi level makes a large covalent contribution to the chemical bonds between the C and Zr atoms. The Bader charge analysis suggests that there are about 1.71 electrons transferred from each Zr atom to its nearest C atom. Therefore, the Zr–C bond displays a mixed ionic/covalent character. The calculated phonon dispersions of ZrC are stable, coinciding with the experimental measurement. A drastic expansion in the volume of ZrC is seen with increasing temperature, while the bulk modulus decreases linearly. Based on the calculated phonon dispersion curves and within the quasi-harmonic approximation, the temperature dependence of the heat capacities is obtained, which gives a good description compared with the available experimental data.
Author: Yue Zhou
Publisher:
ISBN:
Category :
Languages : en
Pages : 129
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"This research focused on the synthesis and phase formation of zirconium carbide with different carbon contents, and lattice thermal conductivity of zirconium carbide with different carbon vacancy, hafnium, and oxygen contents. Nominally pure phase ZrC[sub x] was synthesized by solid-state reaction of zirconium hydride (ZrH2) and carbon black at a temperature as low as 1300°C. The powder synthesized at 1300°C was carbon deficient ZrC[sub x]. Carbon stoichiometry of the as-synthesized powders increased as the synthesis temperature increased. As the synthesis temperature increase, the oxygen content of ZrC[sub x] decreased due to the increasing C site occupancy. Low stoichiometry ZrC[sub 0.6] powders were synthesized at 1300°C and 2000°C, and the formed phases were investigated. Carbon vacancy ordered phases were detected by neutron diffraction and selected area electron diffraction. Lattice thermal conductivities of ZrC[sub x] with different carbon contents (x=1.0, 0.75, 0.5) and different hafnium contents (3.125 at% and 6.25 at% were studied theoretically. A combination of first-principles calculations and the Debye-Callaway model was employed to predict the lattice thermal conductivities. Lattice thermal conductivities of all the compositions decreased as temperature increased. Increasing carbon vacancy content reduced the lattice thermal conductivity while increasing the grain size increased the lattice thermal conductivity. Lattice thermal conductivities of ZrC[sub x] also decreased as the content of Hf increased. Carbon vacancies and Hf impurities decreased the phonon transport, thus the lattice thermal conductivity decreased"--Abstract, page iv.
Author: Los Alamos Scientific Laboratory
Publisher:
ISBN:
Category : Research
Languages : en
Pages : 520
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