Moessbauer-effect study of iron-boron-beryllium metallic glasses
/sup 57/Fe Moessbauer spectra have been obtained at both liquid-nitrogen and room temperatures for a series of metallic glasses Fe/sub 82/B/sub 18-x/Be/sub x/ with 0< or =x< or =6. With the use of Window's program the spectra were fitted and deconvoluted to obtain the probability distribution function of the effective magnetic hyperfine field P(H), and the results show a well-defined symmetric shape for these metallic glasses. The width of P(H), ..delta..H, remains approximately constant at a value of 80 kOe for all samples. However the most probable value of the effective magnetic hyperfine field H/sub 1/ at liquid-nitrogen temperature initially increases with the Be content to 4 at. %, but starts to decrease as x exceeds 4. The isomer shift has a value of -0.032 mm/sec for samples with x< or =4 but changes to -0.050 mm/sec for samples with x>4. The crystallization products obtained upon annealing the Fe/sub 82/B/sub 18/ metallic glass at T/sub a/ = 420 /sup 0/C were identified as tetragonal Fe/sub 3/B and ..cap alpha..-Fe. The annealing of the samples with x>0 between T/sub x/1 and T/sub x/2 yields a metastable amorphous phase and crystalline solid solutions of an Fe-Be phase. Annealing of the samples with x>0 above T/sub x/2 yields crystalline Fe-Be solid solutions and the Fe/sub 2/B intermetallic compound. The intensity ratios in the Moessbauer spectra clearly indicate that annealing of samples between T/sub x/1 and T/sub x/2 led to the alignment of the H-bar/sub eff/ direction close to the ribbon plane, but annealing above T/sub x/2 left H-bar/sub eff/ randomly oriented.
- Research Organization:
- Ames Laboratory-U. S. Department of Energy and Departments of Physics and Materials Science and Engineering, Iowa State University, Ames, Iowa 50011
- OSTI ID:
- 5978053
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Vol. 24:7
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BERYLLIUM
MOESSBAUER EFFECT
BORON
IRON
AMORPHOUS STATE
ANNEALING
DISTRIBUTION FUNCTIONS
EXPERIMENTAL DATA
GLASS
HIGH VACUUM
HYPERFINE STRUCTURE
LOW TEMPERATURE
MAGNETIC FIELDS
MEDIUM TEMPERATURE
ORDER-DISORDER TRANSFORMATIONS
ALKALINE EARTH METALS
DATA
ELEMENTS
FUNCTIONS
HEAT TREATMENTS
INFORMATION
METALS
NUMERICAL DATA
PHASE TRANSFORMATIONS
SEMIMETALS
TRANSITION ELEMENTS
360104* - Metals & Alloys- Physical Properties