New phase nucleus appearance on a twin boundary, which is with an invaribe velocity or oscillating

A. A. Bulbich; P. E. Pumpyan

doi:doi:10.1051/jp1:1993263

Numéro		J. Phys. I France Volume 3, Numéro 5, May 1993


Page(s)		1175 - 1186
DOI		https://doi.org/10.1051/jp1:1993263

DOI: 10.1051/jp1:1993263
J. Phys. I France 3 (1993) 1175-1186

New phase nucleus appearance on a twin boundary, which is with an invaribe velocity or oscillating

A. A. Bulbich¹ and P. E. Pumpyan²

¹ Laboratoire des Transitions de Phases, Facultt des Sciences, Universitb de Picardie, 80039 Amiens, France
² Research Institute of Physics, Rostov University, 344104 Rostov-on-Don, Russia

(Received 12 March 1992, revised 18 December 1992, acrepTed 26 January 1993)

Abstract
The occurrence and dynamics of a nucleus of a new phase on a moving twin boundary are described. The phase diagram of a nucleus on a moving twin boundary is obtained. It is shown that the nucleus can arise on the moving twin boundary only if its velocity tl is smaller than a certain value The existence of two kinds of low-symmetry phase trails (unstable and metastable) is described. The friction force, resulting from a trail and acting on a twin boundary is shown to arise. It is of a viscous type in the case of an unstable trail, and of a " dry " friction force type in the case of metastable trail. The oscillation of the twin boundary with the nucleus in the external periodic field, conjugated to the order parameter is described.