Metals 2013, 3(3), 298-311; doi:10.3390/met3030298

The Thermal Transformation Arrest Phenomenon in NiCoMnAl Heusler Alloys

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Received: 20 May 2013; in revised form: 26 June 2013 / Accepted: 14 August 2013 / Published: 22 August 2013
(This article belongs to the Special Issue Shape Memory Alloys)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: In this report, we present findings of systematic research on NiCoMnAl alloys, with the purpose of acquiring a higher thermal transformation arrest temperature (TA). By systematic research, TA in the NiCoMnAl alloy systems was raised up to 190 K, compared to the highest TA of 130 K in NiCoMnIn. For a selected alloy of Ni40Co10Mn33Al17, magnetization measurements were performed under a pulsed high magnetic field, and the critical magnetic field-temperature phase diagram was determined. The magnetic phase diagram for Ni50-xCoxMn50-yAly was also established. Moreover, from the discussion that the formerly called “kinetic arrest phenomenon” has both thermodynamic and kinetic factors, we suggest a terminology change to the “thermal transformation arrest phenomenon”.
Keywords: thermal transformation arrest; kinetic arrest; actuator materials; metamagnetic shape memory alloy; martensitic transformation; pulsed high magnetic field; NiCoMnIn; NiCoMnAl
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MDPI and ACS Style

Xu, X.; Ito, W.; Tokunaga, M.; Kihara, T.; Oka, K.; Umetsu, R.Y.; Kanomata, T.; Kainuma, R. The Thermal Transformation Arrest Phenomenon in NiCoMnAl Heusler Alloys. Metals 2013, 3, 298-311.

AMA Style

Xu X, Ito W, Tokunaga M, Kihara T, Oka K, Umetsu RY, Kanomata T, Kainuma R. The Thermal Transformation Arrest Phenomenon in NiCoMnAl Heusler Alloys. Metals. 2013; 3(3):298-311.

Chicago/Turabian Style

Xu, Xiao; Ito, Wataru; Tokunaga, Masashi; Kihara, Takumi; Oka, Kengo; Umetsu, Rie Y.; Kanomata, Takeshi; Kainuma, Ryosuke. 2013. "The Thermal Transformation Arrest Phenomenon in NiCoMnAl Heusler Alloys." Metals 3, no. 3: 298-311.

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