Iron bcc-hcp transition: Local structure from x-ray-absorption fine structure
Journal Article
·
· Physical Review, B: Condensed Matter
OSTI ID:3370
- Physics Department, Box 351560, University of Washington
The x-ray-absorption fine-structure technique has been utilized to investigare the pressure-induced bcc-hcp transition in iron from a local structural perspective. Our measurements of the associated lattice constants show a structurally distorted hcp phase with an anomalously large c/a ratio during the transition as reported by previous x-ray-diffraction measurements. We have also observed a structurally distorted bcc phase with an anomalously large lattice constant during the transition. These anomalies are attributed to interfacial strain between the bcc and hcp phases. A transion model based on lattice shearing movements and occurrence of an intermediate fcc structure is consistent with our data and previous results.
- Research Organization:
- University of Washington, Seattle, WA
- Sponsoring Organization:
- USDOE Office of Energy Research (ER)
- DOE Contract Number:
- FG03-97ER45622
- OSTI ID:
- 3370
- Report Number(s):
- DOE/ER/45622-5
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 10 Vol. 57; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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