This article is cited in 10 papers

METHODOLOGICAL NOTES

Structural transformations in metals at high compression

Yu. Kh. Vekilov, O. M. Krasilnikov

State Technological University "Moscow Institute of Steel and Alloys"

Abstract: The structural stability against homogeneous deformation is analyzed for simple and transition BCC and FCC metals under pressure. It is shown that at high compression a crystal lattice becomes instable against shear deformations, leading to new low-symmetry structures. To analyze these structures, the Landau theory of phase transitions with deformation tensor components as order parameters is used. A comparison is made with experimental data on high pressure phases. Prospects are discussed for using the suggested approach to explain structural transformations in solids at high pressure.

PACS: 61.50.Ks, 61.66.Bi, 62.20.D-, 62.50.-p

Received: March 23, 2009

DOI: 10.3367/UFNr.0179.200908f.0883

 English version: Physics–Uspekhi, 2009, 52:8, 831–834

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