Can you give examples of shape memory alloys?
Sure! Shape memory alloys (SMAs) are materials that can return to a predetermined shape when heated. Common examples include Nitinol, which is used in medical devices, and copper-aluminum-nickel alloys, often used in actuators.
What are some applications of Nitinol?
Nitinol is widely used in medical devices like stents and guidewires due to its biocompatibility and ability to change shape. It's also used in eyeglass frames and actuators in robotics.
How do shape memory alloys work?
Shape memory alloys work based on a phase transformation. When cooled, they can be deformed, but upon heating, they revert to their original shape due to the unique arrangement of atoms.
Are there any disadvantages to using shape memory alloys?
Yes, some disadvantages include their relatively high cost, limited temperature range, and potential fatigue over repeated cycles.
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