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Titolo:
Effect of the void formation on the explosive fracture of electron irradiated NaCl crystals
Autore:
Vainshtein, DI; Dubinko, VI; Turkin, AA; den Hartog, HW;
Indirizzi:
Univ Groningen, Solid State Phys Lab, NL-9747 AG Groningen, Netherlands Univ Groningen Groningen Netherlands NL-9747 AG G Groningen, Netherlands Kharkov Phys & Technol Inst, UA-310108 Kharkov, Ukraine Kharkov Phys & Technol Inst Kharkov Ukraine UA-310108 8 Kharkov, Ukraine
Titolo Testata:
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
, volume: 166, anno: 2000,
pagine: 550 - 555
SICI:
0168-583X(200005)166:<550:EOTVFO>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Keywords:
radiation damage; stored energy; colloids; bubbles; voids; fracture;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
5
Recensione:
Indirizzi per estratti:
Indirizzo: den Hartog, HW Univ Groningen, Solid State Phys Lab, Nijenborgh 4, NL-9747AG Groningen, Netherlands Univ Groningen Nijenborgh 4 Groningen Netherlands NL-9747 AG
Citazione:
D.I. Vainshtein et al., "Effect of the void formation on the explosive fracture of electron irradiated NaCl crystals", NUCL INST B, 166, 2000, pp. 550-555

Abstract

Experimental and theoretical results are presented on formation of colloids, halogen bubbles and large vacancy voids in heavily irradiated NaCl crystals leading to their explosive decomposition into small pieces under further irradiation or subsequent heating. The dependence of the radiation stability of material with increasing irradiation dose on the void evolution is analyzed. It is shown that voids can grow very fast as compared to colloids and bubbles. For doses higher than 100 Grad, the void dimensions can exceedthe mean distance, first, between bubbles and then between colloids resulting in their collisions with voids. Collisions with bubbles fill the voids with gas, and subsequent collisions with colloids (during further irradiation or heating) bring the halogen gas and metal to a back reaction inside the voids. Such a sudden release of stored energy can be shown to result in atemperature spike (above 10(4) K) and instantaneous gas pressure rise up to 1 GPa within the voids, which may transform voids into penny-shaped cracks along the cleavage planes of the matrix. A subsequent growth of the cracks results in fracture of the material. Dependence of the critical amount ofstored energy required for the void-crack transition on the mean size of the voids is estimated and compared with experimental data. (C) 2000 Elsevier Science B.V. All rights reserved.

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Documento generato il 14/08/20 alle ore 08:14:56