Crystal Dislocations

Crystals

Ronald W. Armstrong¹ 

[1] Department of Mechanical Engineering, University of Maryland, College Park, MD 20742, USA

关键词: dislocations;    crystals;    polycrystals;    nanopolycrystals;    X-ray topography;    transmission electron microscopy;    optical microscopy;    crystal growth;    crystal strength properties;    electrical properties;   

DOI  :  10.3390/cryst6010009

来源: mdpi

【 摘 要 】

Crystal dislocations were invisible until the mid-20th century although their presence had been inferred; the atomic and molecular scale dimensions had prevented earlier discovery. Now they are normally known to be just about everywhere, for example, in the softest molecularly-bonded crystals as well as within the hardest covalently-bonded diamonds. The advent of advanced techniques of atomic-scale probing has facilitated modern observations of dislocations in every crystal structure-type, particularly by X-ray diffraction topography and transmission electron microscopy. The present Special Issue provides a flavor of their ubiquitous presences, their characterizations and, especially, their influence on mechanical and electrical properties.

【 授权许可】

CC BY   
© 2016 by the authors; licensee MDPI, Basel, Switzerland.