TY - JOUR
T1 - Phase stability and magnetic properties in Co2Cr(Al,Si) shape memory alloys
AU - Hirata, Kenji
AU - Xu, Xiao
AU - Omori, Toshihiro
AU - Kainuma, Ryosuke
N1 - Funding Information:
This study was supported by Grant-in-Aids for Scientific Research and Japan Society for the Promotion of Science (JSPS) (Grant Nos. 15H05766 and 19H02412 ). A part of the experiments was performed at the Center for Low Temperature Science, Institute for Materials Research, Tohoku University and the Center for Instrumental Analysis, Kyushu Institute of Technology . The authors are grateful to Prof. M. Mitoh, Prof. Iikubo and Mr. K. Ogata at Kyushu Institute of Technology for helpful work on using superconducting quantum interference device at Kyushu Institute of Technology.
Funding Information:
This study was supported by Grant-in-Aids for Scientific Research and Japan Society for the Promotion of Science (JSPS) (Grant Nos. 15H05766 and 19H02412). A part of the experiments was performed at the Center for Low Temperature Science, Institute for Materials Research, Tohoku University and the Center for Instrumental Analysis, Kyushu Institute of Technology. The authors are grateful to Prof. M. Mitoh, Prof. Iikubo and Mr. K. Ogata at Kyushu Institute of Technology for helpful work on using superconducting quantum interference device at Kyushu Institute of Technology.
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2020/4/15
Y1 - 2020/4/15
N2 - The phase stability and magnetic properties of the parent phase in the Co2Cr(Al,Si) shape memory alloys were systematically investigated. For the Co-rich portion in the vicinity of stoichiometric composition, the phase boundaries of B2 phase in equilibrium with Co solid solution (A1) phase at 1473 K were identified and the compositions showing martensitic transformation were also determined within the B2 single-phase region. The addition of Si greatly expands the B2 single-phase region compared with that of the Co-Cr-Al ternary system. The Curie temperature and spontaneous magnetization of the L21 phase, which is formed by the order-disorder transition from the B2 phase during water quenching from 1473 K, were 345–540 K and 2.1–2.6 μB/f.u., respectively. The values of spontaneous magnetization were lower than those expected from the Generalized Slater-Pauling rule and the ab-initio calculation.
AB - The phase stability and magnetic properties of the parent phase in the Co2Cr(Al,Si) shape memory alloys were systematically investigated. For the Co-rich portion in the vicinity of stoichiometric composition, the phase boundaries of B2 phase in equilibrium with Co solid solution (A1) phase at 1473 K were identified and the compositions showing martensitic transformation were also determined within the B2 single-phase region. The addition of Si greatly expands the B2 single-phase region compared with that of the Co-Cr-Al ternary system. The Curie temperature and spontaneous magnetization of the L21 phase, which is formed by the order-disorder transition from the B2 phase during water quenching from 1473 K, were 345–540 K and 2.1–2.6 μB/f.u., respectively. The values of spontaneous magnetization were lower than those expected from the Generalized Slater-Pauling rule and the ab-initio calculation.
KW - Cobalt alloys
KW - Heusler alloys
KW - Martensitic transformation
KW - Shape memory alloy
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U2 - 10.1016/j.jmmm.2019.166311
DO - 10.1016/j.jmmm.2019.166311
M3 - Article
AN - SCOPUS:85077148511
SN - 0304-8853
VL - 500
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
M1 - 166311
ER -