Metamagnetic Shape Memory Effect in Porous Ni43Co7Mn39Sn11 Alloy Compacts Fabricated by Pressureless Sintering

Kouhei Ito; Wataru Ito; Rie Y. Umetsu; Ibrahim Karaman; Kiyohito Ishida; Ryosuke Kainuma

doi:10.2320/matertrans.M2011258

Metamagnetic Shape Memory Effect in Porous Ni₄₃Co₇Mn₃₉Sn₁₁ Alloy Compacts Fabricated by Pressureless Sintering

Kouhei Ito, Wataru Ito, Rie Y. Umetsu, Ibrahim Karaman, Kiyohito Ishida, Ryosuke Kainuma

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Keywords: martensitic transformation, metamagnetic shape memory alloy, nickel-based alloy, pressureless sintering

JOURNAL FREE ACCESS

2011 Volume 52 Issue 12 Pages 2270-2273

DOI https://doi.org/10.2320/matertrans.M2011258

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Abstract

Magnetic properties and martensitic transformation response of the Ni₄₃Co₇Mn₃₉Sn₁₁ metamagnetic shape memory alloy compacts fabricated by pressureless sintering were investigated. The porous specimens sintered at 1173 K for 48 h show drastic change of electrical resistivity and magnetization due to martensitic transformation, and the features of magnetic-field-induced martensitic transformation behavior are almost the same as those in bulk specimens. In the porous specimens, the large metamagnetic shape recovery ratio over 40% was observed at 320 K with the application of 8 T magnetic field.

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