A new type of FCT martensite phase in single-crystalline Fe3Pt Invar alloy
Creators
- 1. Department of Materials Science and Engineering, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871 (Japan)
- 2. High-Field Laboratory for Superconducting Materials, Institute for Materials Research, Tohoku University, 2-1-1 Sendai Katahira, Aoba-ku, Sendai, Miyagi 980-8577 (Japan)
Description
Highlights: · TEM observations at room temperature reveal that the specimen is a single phase of L12-type structure. · The spontaneous magnetization and magnetic susceptibility curves of Fe3Pt with S = 0.88 have bend points at 60 K. · XRD measurements reveal that this alloy exhibits a martensitic transformation to FCT and the transformation temperature is 60 K. · The tetragonality c/a is larger than unity in the FCT martensite. · This tetragonality is in contrast to the tetragonality c/a < 1generally observed in the FCT martensite with S < 0.8. - Abstract: Martensitic transformation in a highly ordered Fe3Pt has been investigated by magnetization and X-ray diffraction measurements. We confirmed that a new type of face-centered tetragonal (FCT) martensite phase appears below 60 K in Fe3Pt with a degree of order S = 0.88. The tetragonality c/a gradually increases with decreasing temperature, and is approximately 1.005 at 10 K. This is in contrast to the tetragonality c/a < 1 generally observed in the FCT martensite with a degree of order less than 0.8. The spontaneous magnetization increases in association with the transformation.
Availability note (English)
Available from http://dx.doi.org/10.1016/j.jallcom.2011.06.035Additional details
Identifiers
- DOI
- 10.1016/j.jallcom.2011.06.035;
- PII
- S0925-8388(11)01317-X;
Publishing Information
- Journal Title
- Journal of Alloys and Compounds
- Journal Volume
- 509
- Journal Issue
- 34
- Journal Page Range
- p. 8530-8533
- ISSN
- 0925-8388
- CODEN
- JALCEU
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 43047775
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- INVAR; MAGNETIC SUSCEPTIBILITY; MAGNETIZATION; MARTENSITE; MONOCRYSTALS; PHASE TRANSFORMATIONS; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION
- Descriptors DEC
- ALLOYS; CARBON ADDITIONS; COHERENT SCATTERING; CRYSTALS; DIFFRACTION; ELECTRON MICROSCOPY; IRON ALLOYS; IRON BASE ALLOYS; MAGNETIC PROPERTIES; MICROSCOPY; NICKEL ALLOYS; PHYSICAL PROPERTIES; SCATTERING; TRANSITION ELEMENT ALLOYS
Optional Information
- Copyright
- Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.