Digitale Medien
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
81 (2002), S. 1026-1028
ISSN:
1077-3118
Quelle:
AIP Digital Archive
Thema:
Physik
Notizen:
The formation of a Ti25Hf50Ni25 metallic glass and the phase evolution upon crystallization (devitrification) are reported. The glass is strongly metastable, with a 65 °C separation between the glass transition temperature, Tg=335 °C, and the onset temperature for primary crystallization to a nanoscale microstructure consisting of an icosahedrally symmetric ordered phase, that can not be reported as the icosahedral phase (i-phase). There is no distinction between an i-phase and a high-order crystal rational approximant for such small grains, since the unit cell size of a reasonable high-order approximant is of the order of the grain size. Upon annealing at higher temperatures, the metastable icosahedrally symmetric phase transforms to a stable Ti2Ni-type crystal phase. © 2002 American Institute of Physics.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1063/1.1497724
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