Hysteresis in the high pressure transformation of bcc- to hcp-iron

Journal Article · Mon Apr 15 00:00:00 EDT 1991 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.348779· OSTI ID:5565658

Taylor, R D; Pasternak, M P ^[1]; Jeanloz, R ^[2]

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1. Physics Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (USA)
2. Department of Geology and Geophysics, University of California, Berkeley, California 94720 (USA)

The {alpha}-Fe/{epsilon}-Fe phase transformation has been studied by the Moessbauer effect of {sup 57}Fe in a diamond anvil cell at hydrostatic pressures up to 24 GPa. The {alpha}/{epsilon} composition is easily derived as a function of intermediate pressure. For rising pressures the transition onset is about 9 GPa and half of the {alpha}-Fe is converted to {epsilon}-Fe by 15 GPa; for lowering pressures half of the {epsilon}-Fe is converted to {alpha}-Fe by 9 GPa. The transition pressures, widths, and hysteresis widths are compared to those obtained by other techniques.

• OSTI ID: 5565658
• Journal Information: Journal of Applied Physics; (USA), Vol. 69:8; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
IRON
CRYSTAL-PHASE TRANSFORMATIONS
HYSTERESIS
BCC LATTICES
HCP LATTICES
MEDIUM TEMPERATURE
MOESSBAUER EFFECT
VERY HIGH PRESSURE
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
ELEMENTS
HEXAGONAL LATTICES
METALS
PHASE TRANSFORMATIONS
TRANSITION ELEMENTS
360102* - Metals & Alloys- Structure & Phase Studies