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  Home > JCE Print > Journal of Chemical Education > Issues > 2005  > October  >
Chemistry for Everyone
JCE Classroom Activity
Memory Metal
JCE Editorial Staff
Journal of Chemical Education, Madison, WI 53715
Cover
October 2005
Vol. 82 No. 10
p. 1488A
Abstract
Nitinol metal, also known as "memory" metal, is an alloy of nickel and titanium which exhibits interesting "shape memory" properties. Nitinol's properties are a result of its ability to undergo a solid-to-solid phase change. The nickel and titanium atoms undergo slight shifts in the metal's overall structure as it changes from a low-temperature martensite phase to a high-temperature austenite phase and vice versa. In this Activity, students investigate the properties of wire made from nitinol metal and compare its properties to wire made from other metals such as copper and galvanized steel. Using the observed properties of nitinol metal, students then design (and may make) a toy that would use nitinol metal to operate. This Activity complements the National Chemistry Week 2005 theme, "The Joy of Toys".
More Information
*  Citation
 JCE Editorial Staff. J. Chem. Educ. 2005 82 1488A.
*  Keywords
 Demonstrations; Elementary / Middle School Science; High School / Introductory Chemistry; Metals; Nickel; Titanium
*  History
 Created:
Last Updated:		 August 30, 2005
September 8, 2005
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