TY - JOUR
T1 - Dual acceleration of ¾-¸ transformation in mnal induced by Zn-addition and in-magnetic-field annealing
AU - Kobayashi, Ryota
AU - Takaki, Akio
AU - Mitsui, Yoshifuru
AU - Umetsu, Rie Y.
AU - Takahashi, Kohki
AU - Mizuguchi, Masaki
AU - Koyama, Keiichi
N1 - Funding Information:
This work was partly supported by KAKENHI 26820281, 16H04547, and 16K14374. R. K. is grateful to the JSPS Research Fellowships for Young Scientists (19J12731). Infield heat treatment and magnetization measurements were carried out at the High Field Laboratory for Superconducting Materials (Project no. 18H0042 and 19H0078), and Cooperative Research and Development Center for Advanced Materials, Institute for Materials Research, Tohoku University, respectively.
Publisher Copyright:
© 2020 The Japan Institute of Metals and Materials.
PY - 2021/1/1
Y1 - 2021/1/1
N2 - Combined accelerating effects of ¾¸ phase transformation by in-magnetic-field annealing and Zn-addition were investigated for Mn53Zn2Al45 in magnetic fields up to 15 T. The in-field annealing for Zn-added sample accelerated the ¾¸ transformation 16 times faster than Mn55Al45 at annealing temperature of 623 K. The reduction of magnetization after finishing ¾¸ transformation was also more rapid than that of Mn55Al45. However, magnetic-field-induced acceleration of ¾¸ phase transformation and suppression of precipitation of ¢-phase were observed for Zn-added alloy Mn53Zn2Al45 annealed at 573 K. The obtained results suggested that the ¢-phase stabilized against both ¸- and ¾-phases by Zn-addition. Therefore, although the ¾¸ transformation was efficiently accelerated by in-field annealing of Mn53Zn2Al45, more precisely control of annealing time is required for obtaining high fraction of ferromagnetic ¸-phase.
AB - Combined accelerating effects of ¾¸ phase transformation by in-magnetic-field annealing and Zn-addition were investigated for Mn53Zn2Al45 in magnetic fields up to 15 T. The in-field annealing for Zn-added sample accelerated the ¾¸ transformation 16 times faster than Mn55Al45 at annealing temperature of 623 K. The reduction of magnetization after finishing ¾¸ transformation was also more rapid than that of Mn55Al45. However, magnetic-field-induced acceleration of ¾¸ phase transformation and suppression of precipitation of ¢-phase were observed for Zn-added alloy Mn53Zn2Al45 annealed at 573 K. The obtained results suggested that the ¢-phase stabilized against both ¸- and ¾-phases by Zn-addition. Therefore, although the ¾¸ transformation was efficiently accelerated by in-field annealing of Mn53Zn2Al45, more precisely control of annealing time is required for obtaining high fraction of ferromagnetic ¸-phase.
KW - Ferromagnetic alloys
KW - High magnetic fields
KW - MnAl
KW - Phase transformation
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U2 - 10.2320/matertrans.MT-M2020235
DO - 10.2320/matertrans.MT-M2020235
M3 - Article
AN - SCOPUS:85098556605
SN - 1345-9678
VL - 62
SP - 124
EP - 129
JO - Materials Transactions
JF - Materials Transactions
IS - 1
ER -