TY - JOUR
T1 - Investigations of mechanically alloyed Ni-Zr-Ti-Si amorphous alloys with significant supercooled regions
AU - Lin, C. K.
AU - Feng, Y. B.
AU - Lee, P. Y.
AU - Wang, L. Y.
AU - Lin, H. M.
AU - Chen, G. S.
PY - 2002/11
Y1 - 2002/11
N2 - This study examined the amorphization behavior of Ni57Zr20Ti23-xSix (x = 0, 1, 3) alloy powders synthesized by mechanical alloying technique. According to the results, after 5 h of milling, the mechanically alloyed powders were amorphous at compositions of Ni57Zr20Ti23-xSix (x = 0, 1, 3). The amorphization behavior of Ni57Zr20Ti20Si3 was examined in details. The conventional X-ray diffraction and synchrotron EXAFS results confirm that the fully amorphous powders formed after 5 h of milling. The thermal stability of the Ni57Zr20Ti23-xSix amorphous powders was investigated by differential scanning calorimeter (DSC). As the results demonstrated, the amorphous powders were found to exhibit a large supercooled liquid region before crystallization. The supercooled liquid regions, defined by the difference between Tg and Tx, (i.e. ΔT = Tg-Tx), are 95 K, 66 K, and 88 K, for Ni57Zr20Ti23, Ni57Zr20Ti22Si1, and Ni57Zr20Ti20Si3, respectively.
AB - This study examined the amorphization behavior of Ni57Zr20Ti23-xSix (x = 0, 1, 3) alloy powders synthesized by mechanical alloying technique. According to the results, after 5 h of milling, the mechanically alloyed powders were amorphous at compositions of Ni57Zr20Ti23-xSix (x = 0, 1, 3). The amorphization behavior of Ni57Zr20Ti20Si3 was examined in details. The conventional X-ray diffraction and synchrotron EXAFS results confirm that the fully amorphous powders formed after 5 h of milling. The thermal stability of the Ni57Zr20Ti23-xSix amorphous powders was investigated by differential scanning calorimeter (DSC). As the results demonstrated, the amorphous powders were found to exhibit a large supercooled liquid region before crystallization. The supercooled liquid regions, defined by the difference between Tg and Tx, (i.e. ΔT = Tg-Tx), are 95 K, 66 K, and 88 K, for Ni57Zr20Ti23, Ni57Zr20Ti22Si1, and Ni57Zr20Ti20Si3, respectively.
KW - C. Mechanical alloying and milling
UR - http://www.scopus.com/inward/record.url?scp=0036858565&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036858565&partnerID=8YFLogxK
U2 - 10.1016/S0966-9795(02)00156-5
DO - 10.1016/S0966-9795(02)00156-5
M3 - Article
AN - SCOPUS:0036858565
SN - 0966-9795
VL - 10
SP - 1149
EP - 1155
JO - Intermetallics
JF - Intermetallics
IS - 11-12
ER -