Open AccessElectrical and thermal characteristics of nitinol wires for linear heat detectors
Author(s) -
Cristina Micu,
P. Ciubotariu-Ana,
M. Lohan,
C. O. Mocanita,
Mihai Dumitru,
Costică Bejinariu
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/572/1/012072
Subject(s) - materials science , thermocouple , detector , differential scanning calorimetry , thermal , shape memory alloy , heating element , electrical resistivity and conductivity , thermal conductivity , composite material , phase (matter) , work (physics) , thermodynamics , optics , electrical engineering , chemistry , physics , organic chemistry , engineering
In this work were investigated the modifications of electrical and thermal properties that occur with the phase changes (M→A) during heating a Nitinol shape memory alloy wire for using it as a linear heat detector. The investigations were made using three Nitinol wires with different diameters (1; 0.1 and 0.075 mm). For the thermal characterization we used differential scanning calorimetry (DSC Netzsch 200 Maia) using two different heating rates and for resistivity a milliohmmeter (Extech 380560) and a thermocouple. The results were analyzed from the point of sensitivity of the smart element in order to be used as heat variation detector.