Moessbauer-effect study of iron-boron-beryllium metallic glasses

Journal Article · Thu Oct 01 04:00:00 EDT 1981 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.24.3719· OSTI ID:5978053

Lin, M C; Severin, C S; Barnes, R G; Chen, C W

/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), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 24:7; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals &amp; Alloys-- Physical Properties
ALKALINE EARTH METALS
AMORPHOUS STATE
ANNEALING
BERYLLIUM
BORON
DATA
DISTRIBUTION FUNCTIONS
ELEMENTS
EXPERIMENTAL DATA
FUNCTIONS
GLASS
HEAT TREATMENTS
HIGH VACUUM
HYPERFINE STRUCTURE
INFORMATION
IRON
LOW TEMPERATURE
MAGNETIC FIELDS
MEDIUM TEMPERATURE
METALS
MOESSBAUER EFFECT
NUMERICAL DATA
ORDER-DISORDER TRANSFORMATIONS
PHASE TRANSFORMATIONS
SEMIMETALS
TRANSITION ELEMENTS