Skip to content
Licensed Unlicensed Requires Authentication Published by De Gruyter January 7, 2015

Preparation of MnAlC flakes by surfactant-assisted ball-milling and the effects of annealing

K. P. Su , D. L. Tao , J. Wang , D. X. Huo , Y. Q. Cao , Z. W. Liu and Y. J. Zhang

Abstract

An alternative approach for preparing anisotropic MnAlC powders is reported. [001] textured MnAlC flakes with various sizes and thicknesses were fabricated by surfactant-assisted ball-milling (SABM) of bulk ingots. After ball-milling for 8 h the flakes have thicknesses below 200 nm and aspect ratios as high as 102∼103. After being annealed at suitable temperatures, both bulk and SABMed powders can transform from ∊-phase to τ-phase completely. C-doping cannot prevent the decomposition of the τ-phase into the β+γ2 phases after annealing at above 500°C. The magnetic properties are strongly dependent on both the fraction of the τ-phase and the thickness. A high coercivity of ∼242.8 kA m−1 has been achieved in SABMed powders. The coercivity value is 128.8% higher than the experimental value for bulk materials.


* Correspondence address, Dr. Kunpeng Su, Institute of Materials Physics, Hangzhou Dianzi University, Xiasha Higher Education Park, Hangzhou, 310018, P.R. China. Tel.: +86 571 86878539, Fax: +86 571 86878539, E-mail:
** Prof. Zhongwu Liu, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, P.R. China. Tel.: +86 20-22236906, Fax: +86 20-22236906, E-mail:

References

[1] Z.W.Liu, C.Chen, Z.G.Zheng, B.H.Tan, R.V.Ramanujan: J. Mater. Sci.47 (2012) 2333. 10.1007/s10853-011-6049-8Search in Google Scholar

[2] L.Lewis, F.Jiménez-Villacorta: Metall. Mater. Trans. A (2012) 1.Search in Google Scholar

[3] H.X.Wang, P.Z.Si, W.Jiang, J.G.Lee, C.J.Choi, J.J.Liu, Q.Wu, M.Zhong, H.L.Ge: Open J. Microphys.1 (2011) 19. 10.4236/ojm.2011.12003Search in Google Scholar

[4] C.Y.Duan, X.P.Qiu, B.Ma, Z.Z.Zhang, Q.Y.Jin: Mater. Sci Eng. B162 (2009) 185. 10.1016/j.mseb.2009.04.005Search in Google Scholar

[5] J.H.Park, Y.K.Hong, S.Bae, J.J.Lee, J.Jalli, G.S.Abo, N.Neveu, S.G.Kim, C.J.Choi, J.G.Lee: J. Appl. Phys.107 (2010) 09A731. 10.1063/1.3273365Search in Google Scholar

[6] Q.Zeng, I.Baker, Z.C.Yan: J. Appl. Phys.99 (2006) 08E902. 10.1063/1.2159187Search in Google Scholar

[7] B.Z.Cui, L.Y.Zheng, W.F.Li, J.F.Liu, G.C.Hadjipanayis: Acta Mater.60 (2012) 1721. 10.1016/j.actamat.2011.11.010Search in Google Scholar

[8] B.Z.Cui, W.F.Li, G.C.Hadjipanayis: Acta Mater.59 (2011) 563. 10.1016/j.actamat.2010.09.060Search in Google Scholar

[9] K.P.Su, Z.W.Liu, D.C.Zeng, D.X.Huo, L.W.Li, G.Q.Zhang: J. Phys. D: Appl. Phys.46 (2013) 245003. 10.1088/0022-3727/46/20/205103Search in Google Scholar

[10] A.M.Gabay, N.G.Akdogan, M.Marinescu, J.F.Liu, G.C.Hadjipanayis: J. Phys. Condens. Matter22 (2010) 164213. 10.1088/0953-8984/22/16/164213Search in Google Scholar PubMed

Received: 2014-05-30
Accepted: 2014-09-17
Published Online: 2015-01-07
Published in Print: 2015-01-09

© 2015, Carl Hanser Verlag, München

Downloaded on 9.12.2022 from https://www.degruyter.com/document/doi/10.3139/146.111147/html
Scroll Up Arrow