Moessbauer spectroscopy study of amorphous Fe/sub 87/B/sub 11/Au/sub 2/ ribbon and its crystallization products

Conference · Sat Jan 01 04:00:00 EST 1983

OSTI ID:5830147

Lin, M C; Barnes, R G

Substantial increases in Fe saturation magnetization have been obtained in amorphous Fe-B containing small concentrations of gold. This material is also stable above 300 K, and thus has considerable practical significance. This paper reports the results of an investigation of amorphous Fe/sub 87/B/sub 11/Au/sub 2/ ribbon and its crystallization products based on /sup 57/Fe Moessbauer spectroscopy. The amorphous ribbon exhibits a broad magnetic hyperfine splitting pattern typical of a metallic glass with an effective hyperfine field, H/sub eff/ = 257 kOe, and an isomer shift of 0.058 mm/s relative to metallic Fe at 300 K. The spectra of samples annealed for 25 min between T/sub A/ = 618 K and 708 K arise from a metastable amorphous phase of Fe-Au-B and a crystalline ..cap alpha..-Fe phase. H/sub eff/ of the metastable amorphous phase decreases with respect to increased annealing temperature. However, H/sub eff/ of the ..cap alpha..-Fe phase increases from 331 kOe for samples annealed at 618 K to 334 kOe for those annealed at 708 K. This increase can be attributed to an increased content of Au in the ..cap alpha..-Fe phase. Annealing the samples at temperatures above 753 K for 25 min yields crystalline ..cap alpha..-Fe and the intermetallic compound Fe/sub 2/B.

• Research Organization: Ames Lab., IA (USA)
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 5830147
• Report Number(s): IS-M-459; CONF-831187-1; ON: DE83018091
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
AMORPHOUS STATE
ANNEALING
BORON ALLOYS
EVEN-ODD NUCLEI
GOLD ALLOYS
HEAT TREATMENTS
HYPERFINE STRUCTURE
INTERMEDIATE MASS NUCLEI
IRON 57
IRON ALLOYS
IRON ISOTOPES
ISOMER SHIFT
ISOTOPES
MAGNETIC FIELDS
METALLIC GLASSES
MOESSBAUER EFFECT
NUCLEI
RECRYSTALLIZATION
SHEETS
STABLE ISOTOPES