Abstract

For the present paper, the operating frequencies for thin film Nickel-Titanium (NiTi) shape memory alloy were investigated. The results thus far have shown that careful delivery of power to NiTi membrane increased the operating frequency by an order of magnitude. The method of power delivered to the membrane seemed to depend on the thermal conductivity of the fluid in contact. Stagnant air and mineral oil required shorter heating times and less power due to then-low conducting characteristics. De-ionized water on the other hand required greater power and longer heating time. Although heat dissipation to the surrounding was inevitable, it was determined that delivering large bursts of energy in a short heating time can minimize such loss. This way, more energy was used to heat the membrane rather than dissipating to the surroundings. While only 60Hz was measured using the thin film membrane, higher operating frequencies are achievable if power delivery to the membrane is carefully controlled.

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