Hot film sensors array with nickel as sensing material fabricated on a flexible substrate has been developed
which is flexible and can be attached upon curved surface
such as airfoil’ surface
for rapid distribution measurement of temperature or flow parameters with minimal invasion. The influence of magnetron sputtering and heat treatment parameters
including argon pressure
substrate temperature
sputtering power
and annealing temperature
on sensor’s temperature coefficient of resistance (TCR) has been studied for first time. Finally
high TCR of 4640ppm/℃ with good linearity has been obtained.