Amorphization and crystallization processes of the ball-milled Al-Y-Fe-TM alloys (TM=Ni, Co, Cu, and Fe) (Prop. 2003-037)

Journal Article · Sun Jan 01 04:00:00 EST 2006 · Journal of Non-Crystalline Solids

DOI:https://doi.org/10.1016/j.jnoncrysol.2006.07.004· OSTI ID:931612

Wilson, Timothy W. ^[1]; Choo, Hahn ^[2]; Porter, Wallace D ^[2]; Speakman, Scott A ^[2]; Fan, Chang ^[1]; Liaw, Peter K ^[1]

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1. University of Tennessee, Knoxville (UTK)
2. ORNL

High-energy ball milling was used to synthesize aluminum-based alloys containing amorphous and nanocrystalline phases to investigate the compositional effects of transition metals (TM) on the amorphization and crystallization processes of the ball-milled Al{sub 85}Y{sub 7}Fe{sub 5}TM{sub 3} alloys (TM = Ni, Co, Cu, and Fe) were investigated. The crystallization kinetics of the ball-milled Al-Y-Fe-TM nanocomposite powders were studied using differential scanning calorimetry (DSC). The DSC results of Al{sub 83}Y{sub 7}Fe{sub 5}Ni{sub 5} show that the crystallization temperature and the activation energy of crystallization are 668 K and 310 kJ/mol, respectively. In-situ high-temperature X-ray diffraction showed that the crystallization was a complex process involving growth of the nanocrystalline phase along with crystallization of the amorphous matrix phase.

• Research Organization: Oak Ridge National Laboratory (ORNL); High Temperature Materials Laboratory
• Sponsoring Organization: EE USDOE - Office of Energy Efficiency and Renewable Energy (EE)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 931612
• Journal Information: Journal of Non-Crystalline Solids, Journal Name: Journal of Non-Crystalline Solids Journal Issue: 38-39 Vol. 352; ISSN 0022-3093; ISSN JNCSBJ
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ACTIVATION ENERGY
ALUMINIUM BASE ALLOYS
AMORPHOUS STATE
COBALT ALLOYS
COPPER ALLOYS
CRYSTALLIZATION
IRON ALLOYS
MILLING
NICKEL ALLOYS
YTTRIUM ALLOYS