Title

A Low Hysteresis Nitife Shape Memory Alloy Based Thermal Conduction Switch

Keywords

Actuator; NiTiFe; R-phase; Shape memory; Switch

Abstract

Shape memory alloys possess the ability to return to a preset shape by undergoing a solid state phase transformation at a particular temperature. This work reports on the development and testing of a low temperature thermal conduction switch that incorporates a NiTiFe shape memory element for actuation. The switch was developed to provide a variable conductive pathway between liquid methane and liquid oxygen dewars in order to passively regulate the temperature of methane. The shape memory element in the switch undergoes a rhombohedral or R-phase transformation that is associated with a small hysteresis (typically 1-2 degrees C) and offers the advantage of precision control over a set temperature range. For the NiTiFe alloy used, its thermomechanical processing, subsequent characterization using dilatometry, differential scanning calorimetry and implementation in the conduction switch configuration are addressed. © 2006 American Institute of Physics.

Publication Date

3-31-2006

Publication Title

AIP Conference Proceedings

Volume

824 I

Number of Pages

3-10

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1063/1.2192327

Socpus ID

33845448341 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/33845448341

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