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Titolo:
Nano-scale glass formation in pyrochlore by heavy ion irradiation
Autore:
Wang, SX; Wang, LM; Ewing, RC;
Indirizzi:
Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA Univ Michigan Ann Arbor MI USA 48109 Radiol Sci, Ann Arbor, MI 48109 USA
Titolo Testata:
JOURNAL OF NON-CRYSTALLINE SOLIDS
fascicolo: 1-3, volume: 274, anno: 2000,
pagine: 238 - 243
SICI:
0022-3093(200009)274:1-3<238:NGFIPB>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
BEAM-INDUCED AMORPHIZATION; MOLECULAR-DYNAMICS SIMULATION; DISPLACEMENT CASCADES; ABO(4) ORTHOSILICATES; CERAMIC MATERIALS; TEMPERATURE; TRANSFORMATION; MGO-AL2O3-SIO2; ZIRCON; SOLIDS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Wang, SX Univ Michigan, Dept Nucl Engn & Radiol Sci, 2355 Bonisteel Blvd, Ann Arbor, MI 48109 USA Univ Michigan 2355 Bonisteel Blvd Ann Arbor MI USA 48109 8109 USA
Citazione:
S.X. Wang et al., "Nano-scale glass formation in pyrochlore by heavy ion irradiation", J NON-CRYST, 274(1-3), 2000, pp. 238-243

Abstract

Irradiation-induced amorphization in a pyrochlore (Na,Ca)(2)Nb2O6(F,OH,O) and a microlite (Na,Ca)(2) Ta2O6(F,OH,O) have been studied over a temperature range of 300-873 K by in situ transmission electron microscope (TEM) using 1 MeV Kr+ and 400 keV Xe+ with a dose rate of 8.5 x 10(11) ions/cm(2)/s. Isolated nanometer-sized domains of glass were observed by high-resolutionelectron microscopy in the Xef-irradiated samples. The density of these domains has a 'one-to-one' correlation to the ion density, consistent with the amorphous domains having formed directly within the displacement cascade. The effect of temperature on the amorphization dose was modeled based on acascade quenching mechanism. A two-stage function was observed in the temperature dependence of amorphization dose for both the pyrochlore and microlite. (C) 2000 Elsevier Science B.V. All rights reserved.

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Documento generato il 09/04/20 alle ore 07:47:08