Article

Melting of bcc transition metals and icosahedral clustering

Max Planck Institut für Chemie, Postfach 3060, D-55020 Mainz, Germany; Lawrence Livermore National Laboratory, University of California, Livermore, California 94551, USA
Journal of Physics and Chemistry of Solids DOI:10.1016/j.jpcs.2006.05.009 pp.2178-2182

ABSTRACT In contrast to polyvalent metals, transition metals have low melting slopes (dT/dP) that are due to partially filled d-bands that allow for a lowering of liquid phase energy through s–d electron transfer and the formation of local structures. In the case of bcc transition metals, we show that the apparent discrepancy of diamond-anvil cells (DAC) melting measurements with shock melting of Mo can be understood by reexamining the shock data for V and Ta and introducing the presence of an icosahedral short range order (ISRO) melt phase.

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Keywords

bcc transition metals
 
diamond-anvil cells
 
dT/dP
 
icosahedral short range order
 
liquid phase energy
 
local structures
 
measurements
 
polyvalent metals
 
shock data
 
s–d electron transfer
 
Ta
 
transition metals
 

Marvin Ross