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- W2044778888 endingPage "986" @default.
- W2044778888 startingPage "945" @default.
- W2044778888 abstract "Most metallic elements have a crystal structure that is either body-centered cubic (bcc), face-centered close packed, or hexagonal close packed. If the bcc lattice is the thermodynamically most stable structure, the close-packed structures usually are dynamically unstable, i.e., have elastic constants violating the Born stability conditions or, more generally, have phonons with imaginary frequencies. Conversely, the bcc lattice tends to be dynamically unstable if the equilibrium structure is close packed. This striking regularity essentially went unnoticed until ab initio total-energy calculations in the 1990s became accurate enough to model dynamical properties of solids in hypothetical lattice structures. After a review of stability criteria, thermodynamic functions in the vicinity of an instability, Bain paths, and how instabilities may arise or disappear when pressure, temperature, and/or chemical composition is varied are discussed. The role of dynamical instabilities in the ideal strength of solids and in metallurgical phase diagrams is then considered, and comments are made on amorphization, melting, and low-dimensional systems. The review concludes with extensive references to theoretical work on the stability properties of metallic elements." @default.
- W2044778888 created "2016-06-24" @default.
- W2044778888 creator A5029287546 @default.
- W2044778888 creator A5037535334 @default.
- W2044778888 creator A5049582816 @default.
- W2044778888 creator A5055046311 @default.
- W2044778888 date "2012-06-04" @default.
- W2044778888 modified "2023-10-17" @default.
- W2044778888 title "Lattice instabilities in metallic elements" @default.
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