In situ high-energy x-ray diffraction observation of structural evolution in a Ti-based bulk metallic glass upon heating
Identifieur interne : 007091 ( Main/Exploration ); précédent : 007090; suivant : 007092In situ high-energy x-ray diffraction observation of structural evolution in a Ti-based bulk metallic glass upon heating
Auteurs : N. Zheng [Allemagne] ; G. Wang [Allemagne] ; L. C. Zhang [Australie] ; M. Calin [Allemagne] ; M. Stoica [Allemagne] ; G. Vaughan [France] ; N. Mattern [Allemagne] ; J. Eckert [Allemagne]Source :
- Journal of Materials Research [ 0884-2914 ] ; 2010-12.
Abstract
The structural evolution of the Ti40Zr10Cu34Pd14Sn2 bulk metallic glass (BMG) upon was investigated by means of in situ high-energy x-ray diffraction. The position, width, and intensity of the first peak in diffraction patterns are fitted through Voigt function below 800 K. All the peak position, width, and intensity values show a nearly linear increase with the increasing temperature to the onset temperature of structural relaxation, Tr = 510 K. However, these values start to deviate from the linear behavior between Tr and Tg (the glass transition temperature). The changes in free volume and the coefficient of volume thermal expansion prove that the aforementioned phenomenon is closely related to the structural relaxation releasing excess free volume arrested during rapid quenching of the BMG. Above 800 K, three crystallization events are detected and the first exothermic event is due to the formation of metastable nanocrystals.
Url:
DOI: 10.1557/jmr.2010.0298
Affiliations:
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Res.</title><idno type="ISSN">0884-2914</idno><idno type="eISSN">2044-5326</idno><imprint><publisher>Cambridge University Press</publisher><pubPlace>New York, USA</pubPlace><date type="published" when="2010-12">2010-12</date><biblScope unit="volume">25</biblScope><biblScope unit="issue">12</biblScope><biblScope unit="page" from="2271">2271</biblScope><biblScope unit="page" to="2277">2277</biblScope></imprint><idno type="ISSN">0884-2914</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0884-2914</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">The structural evolution of the Ti40Zr10Cu34Pd14Sn2 bulk metallic glass (BMG) upon was investigated by means of in situ high-energy x-ray diffraction. The position, width, and intensity of the first peak in diffraction patterns are fitted through Voigt function below 800 K. All the peak position, width, and intensity values show a nearly linear increase with the increasing temperature to the onset temperature of structural relaxation, Tr = 510 K. However, these values start to deviate from the linear behavior between Tr and Tg (the glass transition temperature). The changes in free volume and the coefficient of volume thermal expansion prove that the aforementioned phenomenon is closely related to the structural relaxation releasing excess free volume arrested during rapid quenching of the BMG. Above 800 K, three crystallization events are detected and the first exothermic event is due to the formation of metastable nanocrystals.</div></front></TEI><affiliations><list><country><li>Allemagne</li><li>Australie</li><li>France</li></country><region><li>District de Dresde</li><li>Saxe (Land)</li></region><settlement><li>Dresde</li></settlement></list><tree><country name="Allemagne"><region name="Saxe (Land)"><name sortKey="Zheng, N" sort="Zheng, N" uniqKey="Zheng N" first="N." last="Zheng">N. Zheng</name></region><name sortKey="Calin, M" sort="Calin, M" uniqKey="Calin M" first="M." last="Calin">M. Calin</name><name sortKey="Eckert, J" sort="Eckert, J" uniqKey="Eckert J" first="J." last="Eckert">J. Eckert</name><name sortKey="Mattern, N" sort="Mattern, N" uniqKey="Mattern N" first="N." last="Mattern">N. Mattern</name><name sortKey="Stoica, M" sort="Stoica, M" uniqKey="Stoica M" first="M." last="Stoica">M. Stoica</name><name sortKey="Wang, G" sort="Wang, G" uniqKey="Wang G" first="G." last="Wang">G. Wang</name><name sortKey="Zheng, N" sort="Zheng, N" uniqKey="Zheng N" first="N." last="Zheng">N. Zheng</name></country><country name="Australie"><noRegion><name sortKey="Zhang, L C" sort="Zhang, L C" uniqKey="Zhang L" first="L. C." last="Zhang">L. C. Zhang</name></noRegion></country><country name="France"><noRegion><name sortKey="Vaughan, G" sort="Vaughan, G" uniqKey="Vaughan G" first="G." last="Vaughan">G. Vaughan</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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