Doctoral Dissertations

Abstract

"Shape memory alloys are used in a variety of applications. The area of micro- electro-mechanical systems (MEMS) is a developing field for thin film shape memory alloys for making actuators, valves and pumps.

Until recently thin film shape memory alloys could only be made by rapid solidification or sputtering techniques which have the disadvantage of being “line of sight”. At the University of Missouri-Rolla, electrolytic techniques have been developed that allow the production of shape memory alloys in thin film form. The advantages of this techniques are in-situ, non “line of sight” and the ability to make differing properties of the shape memory alloys from one bath.

This research focused on the electrodeposition of In-Cd shape memory alloys. The primary objective was to characterize the electrodeposited shape memory alloys, while the secondary objective was to produce an optimized shape memory effect for an electrodeposited shape memory alloy. The effect of various operating parameters such as peak current density, temperature, pulsing, substrate and agitation were investigated and discussed. The electrodeposited alloys were characterized by relative shape memory effect, phase transformation, morphology and phases present.

Further tests were performed to optimize the shape memory by the use of a statistically designed experiment. An optimized shape memory effect for an In-Cd alloy is reported for the conditions of the experiments"--Abstract, page iv.

Advisor(s)

O'Keefe, T. J. (Thomas J.)

Committee Member(s)

Askeland, Donald R.
Ramsay, Christopher
Switzer, Jay A., 1950-
Johnson, James W., 1930-2002

Department(s)

Materials Science and Engineering

Degree Name

Ph. D. in Metallurgical Engineering

Comments

This work was partially supported by National Science Foundation Contract DMR-9205822 and U.S. Army Research Office Grant number DAAL03-90-G-0053 and is gratefully acknowledged.

Publisher

University of Missouri--Rolla

Publication Date

Fall 1997

Journal article titles appearing in thesis/dissertation

  • Overview of the Synthesis of Shape Memory Alloys by Electrodeposition Techniques
  • Electrodeposition of In-Cd Shape Memory Alloys
  • Optimization of Electrodeposited In-Cd Shape Memory Alloys
  • Statistical Analysis of Electrolytic Deposition of In-Cd Shape Memory Alloys

Pagination

xxii, 221 pages

Note about bibliography

Includes bibliographical references.

Rights

© 1997 Timothy Roy Hymer, All rights reserved.

Document Type

Dissertation - Restricted Access

File Type

text

Language

English

Thesis Number

T 7363

Print OCLC #

38736858

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