The Thermal Transformation Arrest Phenomenon in NiCoMnAl Heusler Alloys

Metals

关键词: thermal transformation arrest;    kinetic arrest;    actuator materials;    metamagnetic shape memory alloy;    martensitic transformation;    pulsed high magnetic field;    NiCoMnIn;    NiCoMnAl;   

DOI  :  10.3390/met3030298

来源: DOAJ

【 摘 要 】

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”.

【 授权许可】

Unknown