Том 10, Выпуск 4s, Ноябрь 2020

Специальный выпуск по теме "Grain Boundaries, Interfaces and Properties of Crystalline Materials"

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Grain and interphase boundaries play an important, in some cases determining role in physical and mechanical properties of materials. At low temperatures they are barriers for dislocations and the interaction of dislocations and interfaces contributes greatly to the strength of crystals. At high temperatures the internal boundaries are the places of different processes determining the plasticity of materials such as diffusion, grain boundary sliding and migration, etc. Of a particular importance are the structures of interfaces and processes occurring there for the properties of nanocrystalline materials in which the interfaces occupy a considerable fraction of the volume. Furthermore, the development of new 2D materials such as graphene, posed the problem of broadening the concept of interfaces to these materials too. Thus, the study of the interfaces and their role in the material properties has always been at the forefront of Materials Science. In the latest decades, a great success has been achieved in the studies of grain boundaries and interfaces due to tremendous progresses in experimental equipment and techniques, computational tools and methods and the development of new materials. To outline at least a few of such successes, we have collected a few papers written by world-known researchers in the field as a special issue of the journal “Letters on Materials”.

As the editors of this special edition of Letters on Materials, we are sincerely grateful to all authors who have contributed papers to this special issue. Their cooperation and willingness have made the publication of this volume possible. Although all papers in this issue were invited, they were reviewed according to the standards of the journal. Therefore, the editors wish also to thank all the reviewers who have contributed to improvements in the papers.

Editors:

Louisette Priester, Université Paris Sud, Paris, France

Boris Straumal, Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Russia


Переход от прямой к обратной зависимости Холла-Петча для нанокристаллических керамик связан с увеличением плотности тройных стыков и испускания дислокаций из этих стыков.