TY - JOUR
T1 - Real time synchrotron studies on amorphous Al85Ce 5Ni8Co2 and Al85Y5Ni 8Co2 alloys
AU - Révész, Á
AU - Heunen, G.
AU - Varga, L. K.
AU - Suriñach, S.
AU - Baró, M. D.
PY - 2004/4/14
Y1 - 2004/4/14
N2 - The crystallization of Al85Ce5Ni8Co 2 and Al85Y5Ni8Co2 alloys was studied using differential scanning calorimetry (DSC) and in situ X-ray diffraction (XRD). Continuous heating DSC measurements revealed that Al85Ce5Ni8Co2 and Al 85Y5Ni8Co2 alloys exhibit a glass transition followed by a super-cooled liquid region where crystallization occurs through a two- and three-stage process, respectively. The crystallization sequences were also observed in situ by means of XRD using a third generation synchrotron source. During the first crystallization stage, the primary precipitation of α-Al takes place only in the Al 85Y5Ni8Co2 alloy while in the Al85Ce5Ni8Co2 alloy, a simultaneous precipitation of a metastable Al11Ce3 and α-Al was observed. The final microstructure contained α-Al, Al3Y/Ce, Al9Co2, and Al3Ni phases. The crystallization was monitored both during heating of the amorphous alloy and during cooling of the liquid alloy in order to detect possible differences in the nature of the crystallization. © 2003 Elsevier B.V. All rights reserved.
AB - The crystallization of Al85Ce5Ni8Co 2 and Al85Y5Ni8Co2 alloys was studied using differential scanning calorimetry (DSC) and in situ X-ray diffraction (XRD). Continuous heating DSC measurements revealed that Al85Ce5Ni8Co2 and Al 85Y5Ni8Co2 alloys exhibit a glass transition followed by a super-cooled liquid region where crystallization occurs through a two- and three-stage process, respectively. The crystallization sequences were also observed in situ by means of XRD using a third generation synchrotron source. During the first crystallization stage, the primary precipitation of α-Al takes place only in the Al 85Y5Ni8Co2 alloy while in the Al85Ce5Ni8Co2 alloy, a simultaneous precipitation of a metastable Al11Ce3 and α-Al was observed. The final microstructure contained α-Al, Al3Y/Ce, Al9Co2, and Al3Ni phases. The crystallization was monitored both during heating of the amorphous alloy and during cooling of the liquid alloy in order to detect possible differences in the nature of the crystallization. © 2003 Elsevier B.V. All rights reserved.
KW - Al-based alloys
KW - Crystallization
KW - Metallic glasses
KW - Synchrotron radiation
U2 - 10.1016/j.jallcom.2003.07.021
DO - 10.1016/j.jallcom.2003.07.021
M3 - Article
SN - 0925-8388
VL - 368
SP - 164
EP - 168
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -