Phase separation and crystallization process of amorphous Fe{sub 78}B{sub 12}Si{sub 9}Ni{sub 1} alloy

Journal Article · Mon Aug 17 00:00:00 EDT 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4928273· OSTI ID:22488753

Mukhgalin, V. V.; Lad’yanov, V. I. ^[1]

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1. Department of Structural-Phase Transformations, Physical Technical Institute, Ural Branch of the Russian Academy of Sciences, Kirov street 132, Izhevsk (Russian Federation)

The influence of the melt heat treatment on the structure and crystallization process of the rapidly quenched amorphous Fe{sub 78}B{sub 12}Si{sub 9}Ni{sub 1} alloys have been investigated by means of x-ray diffraction, DSC and TEM. Amorphous phase separation has been observed in the alloys quenched after the preliminary high temperature heat treatment of the liquid alloy (heating above 1400°C). Comparative analysis of the pair distribution functions demonstrates that this phase separation accompanied by a changes in the local atomic arrangement. It has been found that crystallization process at heating is strongly dependent on the initial amorphous phase structure - homogeneous or phase separated. In the last case crystallization goes through the formation of a new metastable hexagonal phase [a=12.2849(9) Ǻ, c=7.6657(8) Ǻ]. At the same time the activation energy for crystallization (Ea) reduces from 555 to 475 kJ mole{sup −1}.

• OSTI ID: 22488753
• Journal Information: AIP Conference Proceedings, Vol. 1673, Issue 1; Conference: LAM-15: 15. international conference on liquid and amorphous metals, Beijing (China), 15-20 Sep 2013; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACTIVATION ENERGY
AMORPHOUS STATE
BORON ALLOYS
CALORIMETRY
CRYSTALLIZATION
DISTRIBUTION FUNCTIONS
HEAT TREATMENTS
HEATING
HEXAGONAL LATTICES
IRON BASE ALLOYS
LIQUIDS
NICKEL ALLOYS
SILICON ALLOYS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION