UNDERCOOLING AND SOLIDIFICATION BEHAVIOR OF A METASTABLE DECAGONAL QUASI-CRYSTALLINE PHASE AND CRYSTALLINE PHASES IN AL-CO

Authors
SCHROERS J HOLLANDMORITZ D HERLACH DM GRUSHKO B URBAN K
Citation
J. Schroers et al., UNDERCOOLING AND SOLIDIFICATION BEHAVIOR OF A METASTABLE DECAGONAL QUASI-CRYSTALLINE PHASE AND CRYSTALLINE PHASES IN AL-CO, Materials science & engineering. A, Structural materials: properties, microstructure and processing, 226, 1997, pp. 990-994
Citations number
11
Categorie Soggetti
Material Science
Journal title
Materials science & engineering. A, Structural materials: properties, microstructure and processing → ACNP
ISSN journal
09215093
Volume
226
Year of publication
1997
Pages
990 - 994
Database
ISI
SICI code
0921-5093(1997)226:<990:UASBOA>2.0.ZU;2-O
Abstract
The maximum undercoolability of Al-Co melts of 72 and 74 at.% Al was s tudied by electromagnetic levitation technique. A metastable decagonal phase was solidified in largely undercooled samples of Al74Co26. The melting temperature of the metastable decagonal phase was determined t o be 1440 K. To identify the phases crystallized upon undercooling the melt, the as-solidified samples were analyzed with respect to their p hase-structures by means of scanning and transmission electron microsc opy (SEM, TEM) and X-ray diffraction (XRD). Differential thermal analy sis (DTA) was employed to measure the heat of fusion Delta H-f of the metastable D-phase. (C) 1997 Elsevier Science S.A.