%0 Journal Article
%T The Thermal Transformation Arrest Phenomenon in NiCoMnAl Heusler Alloys
%A Xiao Xu
%A Wataru Ito
%A Masashi Tokunaga
%A Takumi Kihara
%A Kengo Oka
%A Rie Y. Umetsu
%A Takeshi Kanomata
%A Ryosuke Kainuma
%J Metals
%D 2013
%I MDPI AG
%R 10.3390/met3030298
%X 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¡±.
%K thermal transformation arrest
%K kinetic arrest
%K actuator materials
%K metamagnetic shape memory alloy
%K martensitic transformation
%K pulsed high magnetic field
%K NiCoMnIn
%K NiCoMnAl
%U http://www.mdpi.com/2075-4701/3/3/298