Kinetics of the amorphous to icosahedral phase transformation in Al-Cu-V alloys
- Washington Univ., St. Louis, MO (USA)
Single phase icosahedral samples are obtained by annealing melt spun Al{sub 75}Cu{sub 15}V{sub 10} amorphous alloys. The kinetics of this amorphous to icosahedral phase transformation were measured isothermally and nonisothermally by differential scanning calorimetry and changes in electrical resistivity. Transmission electron microscopy and energy dispersive x-ray analysis indicate that the transformation proceeds polymorphically by nucleation and growth, ruling out a microquasicrystal model of the glass in this system. Fits are made to a kinetic model. The difference in enthalpy between the amorphous and icosahedral phase is {minus}1.9 kJ/mol. The extrapolated residual resistivities of the amorphous and icosahedral phase of 152 {mu}{Omega}-cm and 179 {mu}{Omega}-cm, respectively.
- OSTI ID:
- 6182351
- Journal Information:
- Applied Physics Communications; (USA), Journal Name: Applied Physics Communications; (USA) Vol. 10:1-2; ISSN 0277-9374; ISSN APCOD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
ALUMINIUM ALLOYS
ALUMINIUM BASE ALLOYS
CALORIMETRY
CHEMICAL ANALYSIS
COPPER ALLOYS
ELECTRON MICROSCOPY
KINETICS
MICROSCOPY
NONDESTRUCTIVE ANALYSIS
PHASE TRANSFORMATIONS
TRANSMISSION ELECTRON MICROSCOPY
VANADIUM ALLOYS
X-RAY EMISSION ANALYSIS
X-RAY FLUORESCENCE ANALYSIS