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Two-Directional TiNi Shape Memory Alloy Film

✍ Scribed by H. Takagi; K. Okano; S. Juodkazis; S. Matsuo; H. Misawa

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
194 KB
Volume
5
Category
Article
ISSN
1438-1656

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✦ Synopsis

A change from a memorized convex to a concave curvature between 10 °C for the martensitic and 50 °C for the austenitic transition is the important feature of a novel two‐directional shape TiNi memory alloy film fabricated by sputtering. The key to two‐directional actuation is Ti~3~Ni~4~ precipitate formation attained by an Ni enrichment (55.6 %) in the alloy. The Figure shows the bending of a strip placed over a steaming cup of tea after 0.1 to 0.4 seconds.

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