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    Structure, elastic stiffness, and hardness of Os 1- xRu xB 2 solid solution transition-metal diborides

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    Type
    Article
    Authors
    Kanoun, Mohammed
    Hermet, Patrick
    Goumri-Said, Souraya
    KAUST Department
    KAUST Catalysis Center (KCC)
    Physical Science and Engineering (PSE) Division
    Date
    2012-05-18
    Online Publication Date
    2012-05-18
    Print Publication Date
    2012-05-31
    Permanent link to this record
    http://hdl.handle.net/10754/562199
    
    Metadata
    Show full item record
    Abstract
    On the basis of recent experiments, the solid solution transition-metal diborides were proposed to be new ultra-incompressible hard materials. We investigate using density functional theory based methods the structural and mechanical properties, electronic structure, and hardness of Os 1-xRu xB 2 solid solutions. A difference in chemical bonding occurs between OsB 2 and RuB 2 diborides, leading to significantly different elastic properties: a large bulk, shear moduli, and hardness for Os-rich diborides and relatively small bulk, shear moduli, and hardness for Ru-rich diborides. The electronic structure and bonding characterization are also analyzed as a function of Ru-dopant concentration in the OsB 2 lattice. © 2012 American Chemical Society.
    Citation
    Kanoun, M. B., Hermet, P., & Goumri-Said, S. (2012). Structure, Elastic Stiffness, and Hardness of Os1–xRuxB2 Solid Solution Transition-Metal Diborides. The Journal of Physical Chemistry C, 116(21), 11746–11751. doi:10.1021/jp3015657
    Publisher
    American Chemical Society (ACS)
    Journal
    The Journal of Physical Chemistry C
    DOI
    10.1021/jp3015657
    ae974a485f413a2113503eed53cd6c53
    10.1021/jp3015657
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; KAUST Catalysis Center (KCC)

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