Texture development and coercivity enhancement in cast alnico 9 magnets
Abstract
The effect of Y addition and magnetic field on texture and magnetic properties of arc-melted alnico 9 magnets has been investigated. Small additions of Y (1.5 wt.%) develop a (200) texture for the arc-melted alnico 9 magnet. Such a texture is hard to form in cast samples. To achieve this goal, we set up a high-field annealing system with a maximum operation temperature of 1250 °C. This system enabled annealing in a field of 45 kOe with subsequent draw annealing for the solutionized buttons; we have been able to substantially increase remanence ratio and coercivity, from 0.70 and 1200 Oe for the Y-free alnico 9 to 0.90 and 1400 Oe for the Y-doped alnico 9, respectively. A high energy product of 7.3 MGOe has been achieved for the fully heat-treated Y-doped alnico 9. The enhancement of coercivity is believed to arise from the introduction of magnetocrystalline anisotropy from 80 nm Y2Co17-type grains, which are exchange-coupled to the main-phase alnico rods.
- Authors:
-
- Univ. of Nebraska, Lincoln, NE (United States)
- Ames Lab., Ames, IA (United States)
- Publication Date:
- Research Org.:
- Ames Lab., Ames, IA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1556932
- Alternate Identifier(s):
- OSTI ID: 1414985
- Report Number(s):
- IS-J-9633
Journal ID: ISSN 2158-3226
- Grant/Contract Number:
- under Award ECCS: 1542182; AC02-07CH11358
- Resource Type:
- Accepted Manuscript
- Journal Name:
- AIP Advances
- Additional Journal Information:
- Journal Volume: 8; Journal Issue: 5; Journal ID: ISSN 2158-3226
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Zhang, Wenyong, Valloppilly, Shah, Li, Xingzhong, Yue, Lanping, Skomski, Ralph, Anderson, Iver, Kramer, Matthew, Tang, Wei, Shield, Jeff, and Sellmyer, David J. Texture development and coercivity enhancement in cast alnico 9 magnets. United States: N. p., 2017.
Web. doi:10.1063/1.5007171.
Zhang, Wenyong, Valloppilly, Shah, Li, Xingzhong, Yue, Lanping, Skomski, Ralph, Anderson, Iver, Kramer, Matthew, Tang, Wei, Shield, Jeff, & Sellmyer, David J. Texture development and coercivity enhancement in cast alnico 9 magnets. United States. https://doi.org/10.1063/1.5007171
Zhang, Wenyong, Valloppilly, Shah, Li, Xingzhong, Yue, Lanping, Skomski, Ralph, Anderson, Iver, Kramer, Matthew, Tang, Wei, Shield, Jeff, and Sellmyer, David J. Wed .
"Texture development and coercivity enhancement in cast alnico 9 magnets". United States. https://doi.org/10.1063/1.5007171. https://www.osti.gov/servlets/purl/1556932.
@article{osti_1556932,
title = {Texture development and coercivity enhancement in cast alnico 9 magnets},
author = {Zhang, Wenyong and Valloppilly, Shah and Li, Xingzhong and Yue, Lanping and Skomski, Ralph and Anderson, Iver and Kramer, Matthew and Tang, Wei and Shield, Jeff and Sellmyer, David J.},
abstractNote = {The effect of Y addition and magnetic field on texture and magnetic properties of arc-melted alnico 9 magnets has been investigated. Small additions of Y (1.5 wt.%) develop a (200) texture for the arc-melted alnico 9 magnet. Such a texture is hard to form in cast samples. To achieve this goal, we set up a high-field annealing system with a maximum operation temperature of 1250 °C. This system enabled annealing in a field of 45 kOe with subsequent draw annealing for the solutionized buttons; we have been able to substantially increase remanence ratio and coercivity, from 0.70 and 1200 Oe for the Y-free alnico 9 to 0.90 and 1400 Oe for the Y-doped alnico 9, respectively. A high energy product of 7.3 MGOe has been achieved for the fully heat-treated Y-doped alnico 9. The enhancement of coercivity is believed to arise from the introduction of magnetocrystalline anisotropy from 80 nm Y2Co17-type grains, which are exchange-coupled to the main-phase alnico rods.},
doi = {10.1063/1.5007171},
journal = {AIP Advances},
number = 5,
volume = 8,
place = {United States},
year = {Wed Dec 27 00:00:00 EST 2017},
month = {Wed Dec 27 00:00:00 EST 2017}
}
Works referenced in this record:
Development of controlled solid-state alignment for alnico permanent magnets in near-final shape
journal, May 2017
- Anderson, Iver E.; Kassen, Aaron G.; White, Emma M. H.
- AIP Advances, Vol. 7, Issue 5
Novel pre-alloyed powder processing of modified alnico 8: Correlation of microstructure and magnetic properties
journal, May 2015
- Anderson, I. E.; Kassen, A. G.; White, E. M. H.
- Journal of Applied Physics, Vol. 117, Issue 17
Atomic-scale Chemical Imaging and Quantification of Metallic Alloy Structures by Energy-Dispersive X-ray Spectroscopy
journal, February 2014
- Lu, Ping; Zhou, Lin; Kramer, M. J.
- Scientific Reports, Vol. 4, Issue 1
Architecture and magnetism of alnico
journal, August 2014
- Zhou, Lin; Miller, M. K.; Lu, Ping
- Acta Materialia, Vol. 74
Coercivity and nanostructure of melt-spun Ti-Fe-Co-B-based alloys
journal, May 2016
- Zhang, W. Y.; Skomski, R.; Kashyap, A.
- AIP Advances, Vol. 6, Issue 5
Compression Molding and Novel Sintering Treatments for Alnico Type-8 Permanent Magnets in Near-Final Shape with Preferred Orientation
journal, July 2017
- Kassen, Aaron G.; White, Emma M. H.; Tang, Wei
- JOM, Vol. 69, Issue 9
Software Design for Simulation and Analysis of Electron Diffraction Patterns
journal, July 2012
- Li, X.
- Microscopy and Microanalysis, Vol. 18, Issue S2
Landyne - a Software Suite for Electron Diffraction Simulation and Analysis
journal, July 2016
- Li, X. -Z.
- Microscopy and Microanalysis, Vol. 22, Issue S3
Structure and magnetic properties of Y2Co17−xSix compounds
journal, October 1999
- Hu, S. J.; Wei, X. Z.; Zeng, D. C.
- Physica B: Condensed Matter, Vol. 270, Issue 1-2
Crystal structure and magnetic properties of the Y2Co17−xGax phases
journal, September 2007
- Vityk, N.; Suski, W.; Gladyshevskii, R.
- Journal of Alloys and Compounds, Vol. 442, Issue 1-2
Effect of interstitial hydrogen and nitrogen on magnetic and structural properties of R2T17 (R ≡ Y, Ce and Sm; T ≡ Fe, Co and Ni)
journal, March 1995
- Fujii, H.; Akayama, M.; Nakao, K.
- Journal of Alloys and Compounds, Vol. 219, Issue 1-2
Magnetic properties of Pr2Co17−xAlx and Y2Co17−xAlx
journal, August 1997
- Zhang, D.; de Groot, C. H.; Brück, E.
- Journal of Alloys and Compounds, Vol. 259, Issue 1-2