Discovery of a metastable Al{sub 20}Sm{sub 4} phase

Journal Article · Mon Mar 09 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4914399· OSTI ID:22395700

Zhang, F.; Mendelev, M. I.; Ott, R. T.; Park, E.; Besser, M. F.; Kramer, M. J.; Wang, C. -Z. ^[1]; Sun, Y. ^[1]; Ding, Z. ^[2]

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1. Ames Laboratory, U.S. Department of Energy, Ames, Iowa 50011 (United States)
2. Hefei National Laboratory for Physical Sciences at the Microscale and Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026 (China)

We present an efficient genetic algorithm, integrated with experimental diffraction data, to solve a nanoscale metastable Al{sub 20}Sm{sub 4} phase that evolves during crystallization of an amorphous magnetron sputtered Al{sub 90}Sm{sub 10} alloy. The excellent match between calculated and experimental X-ray diffraction patterns confirms an accurate description of this metastable phase. Molecular dynamic simulations of crystal growth from the liquid phase predict the formation of disordered defects in the devitrified crystal.

• OSTI ID: 22395700
• Journal Information: Applied Physics Letters, Vol. 106, Issue 10; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALGORITHMS
ALUMINIUM BASE ALLOYS
CRYSTAL DEFECTS
CRYSTAL GROWTH
CRYSTALLIZATION
CRYSTALS
LIQUIDS
METASTABLE STATES
NANOSTRUCTURES
SAMARIUM ALLOYS
SPUTTERING
X-RAY DIFFRACTION