Dislocation density in electrolytically-coloured KCl crystals
نویسندگان
چکیده
منابع مشابه
Mesostructured AgCl–KCl Eutectic Photonic Crystals
Dr. J. Kim, Dr. J. H. Choi, Dr. J. Choi, H. S. Kim, Dr. J. Liu, Prof. C.-R. Cho, J. G. Kang, Prof. P. V. Braun Department of Materials Science and Engineering Frederick Seitz Materials Research Laboratory University of Illinois at Urbana-Champaign Urbana , IL 61801 , USA E-mail: [email protected] Dr. L. K. Aagesen, Dr. A. Ramazani, Prof. K. Thornton Department of Materials Science and Enginee...
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A useful solution (10 mgr of Fe CI3 in 25 cc. of isopropanol plus two drops of water) for observing dislocations in KCl by the etching method has recently been reported by Subramanian [1]. The ability of solutions of this kind to selectively etch is attributed to an inhibitor effect [2, 3, 4], but little is known about the nature of the inhibitor agent. It should be kept in mind that transition...
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The absorption spectra of Tl2+ in KCl crystals have been measured from 77 to 300 K. Tl2+ gives rise to five absorption bands peaking a t 1760, 860, 680, 460 and 233 nm. These oscillator strengths have been calculated. Optical excitation in the 460 nm band destroys the Tl2+ and Tl++ bands and produces the Tl° bands. Thermal excitation of a crystal containing only Tl2+ and T1++ results in the sim...
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We consider the equation vt = Lsv −W ′(v) + σε(t, x) in (0,+∞)×R, where Ls is an integro-differential operator of order 2s, with s ∈ (0, 1), W is a periodic potential, and σε is a small external stress. The solution v represents the atomic dislocation in the Peierls–Nabarro model for crystals, and we specifically consider the case s ∈ (0, 1/2), which takes into account a strongly nonlocal elast...
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The dominant mechanism for creating large irreversible strain in atomic crystals is the motion of dislocations, a class of line defects in the crystalline lattice. Here we show that the motion of dislocations can also be observed in strained colloidal crystals, allowing detailed investigation of their topology and propagation. We describe a laser diffraction microscopy setup used to study the g...
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ژورنال
عنوان ژورنال: Bulletin of Materials Science
سال: 1986
ISSN: 0250-4707,0973-7669
DOI: 10.1007/bf02744359