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The Temperature Dependent Damping Behavior of Novel Nanocomposites for Structural Materials Applications

Published online by Cambridge University Press:  01 February 2011

Ramazan Asmatulu ,
Rick Claus ,
Jeff Mecham  and
Dan Inman
Ramazan Asmatulu
Affiliation:
Fiber & Electro Optics Research Center, Bradley Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, VA 24061
Rick Claus
Affiliation:
Fiber & Electro Optics Research Center, Bradley Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, VA 24061 NanoSonic Inc., 1485 South Main Street, Blacksburg, VA 24060
Jeff Mecham
Affiliation:
NanoSonic Inc., 1485 South Main Street, Blacksburg, VA 24060
Dan Inman
Affiliation:
Center for Intelligent Materials, Virginia Tech, Blacksburg, VA 24061.
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Abstract

Near nanoscale fine particles including vanadium dioxide (VO2) and zinc oxide (ZnO) were incorporated into matrix materials (tin and polymer adhesives). A number of mechanical damping tests were conducted on the prepared composite materials at frequency ranges of 0 − 2 kHz and over a broad temperature range. The mechanical vibration test results showed that VO2 and ZnO gave significantly higher negative-stiffness (or damping) at approximately 68 °C (155 F) and 29 °C (85 F). For example, approximately 15% and 12% damping values were achieved at first and second resonance frequencies, respectively, which can potentially prevent vibration on the materials. This significant improvement on the damping of the nanocomposite material may be because of the ferroelasticity, viscoelasticity and/or interfacial sliding at those particular temperatures. It was also observed the etching of substrate surfaces improved adhesion and contributed consistent results to vibration testing reproducibility. Thus, it is concluded that nanocomposite existing damping properties can be an important method to achieve large damping responses over a broad temperature range.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 791: Symposium Q – Mechanical Properties of Nanostructured Materials and Nanocomposites , 2003 , Q2.7
Copyright
Copyright © Materials Research Society 2004

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