Volume 71, Number 4, August 2005
|Page(s)||611 - 617|
|Section||Condensed matter: structural, mechanical and thermal properties|
|Published online||22 July 2005|
Pressure-temperature-time-transition diagram in a strong metallic supercooled liquid
Institute of Physics, Chinese Academy of Sciences - Beijing 100080, PRC
2 Japan Atomic Energy Research Institute, SPring-8 - Hyogo 679-5198, Japan
3 Spallation Neutron Source and Metals Ceramics Division Oak Ridge National Laboratory - Oak Ridge, TN 37830, USA
Corresponding author: email@example.com
Accepted: 20 June 2005
The crystallization kinetics and nucleation mechanism of a bulk metallic glass-forming alloy (vit4) in the entire supercooled liquid region (SLR) is investigated using in situ high-pressure and high-temperature X-ray diffraction with synchrotron radiation, which allows us for the first time to simultaneously determine the crystallization kinetics and phase evolution of a metallic liquid as a function of time under high pressure. The results are summarized in a pressure-time–temperature-transformation (PTTT) diagram with two time scales. The results suggest that the dominant crystallization mechanism of the BMG is growth-controlled.
PACS: 61.43.Fs – Glasses / 62.50.+p – High-pressure and shock wave effects in solids and liquids / 64.70.Dv – Solid-liquid transitions
© EDP Sciences, 2005
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