Frequency and Temperature Dependent Dynamic Mechanical Properties of Metal Matrix-Barium Titanate Composites

Ferroelastic reinforced metal matrices have exhibited anomalous dynamic mechanical properties that are believed to be caused by mechanical coupling between the metal matrix and the frequencydependent ferroelestic reinforcement. To examine this unique behavior, powder metallurgy was used to fabricate...

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Bibliographic Details
Published in:AIP conference proceedings 2012-03
Main Authors: Tilka, Jack, Bryan, Zachary, Jones, Jacob, Manuel, Michele
Format: Article
Language:English
Subjects:
Barium titanates
Copper
Dynamic mechanical properties
Joining
Matrices
Particulate composites
Powder metallurgy
Titanates
Online Access:Get full text
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Summary:Ferroelastic reinforced metal matrices have exhibited anomalous dynamic mechanical properties that are believed to be caused by mechanical coupling between the metal matrix and the frequencydependent ferroelestic reinforcement. To examine this unique behavior, powder metallurgy was used to fabricate a composite consisting of a copper matrix and ferroelastic barium titanate particles. Dynamic mechanical analysis of the storage and loss moduli as a function of frequency and temperature was completed on the composite, as well as the individual copper and barium titanate constituents. These studies are used to determine if there are mechanic properties that extend beyond those predicted by traditional mixing rules or superposition. Ultimately, this reveals details about the unique interaction of constrained ferroelastic particles in a damping matrix. This research was funded by NSF Grant #CMMI-0824352.
ISSN:0094-243X