Research in Aluminum Matrix Composites for Improvement in Damping Capacity
Date Published: 2005-04-11
Paper Number:2005-01-1389
DOI: 10.4271/2005-01-1389
Citation:
Sakaguchi, T., Takeuchi, S., Kogo, Y., Igata, N. et al., "Research in Aluminum Matrix Composites for Improvement in Damping Capacity," SAE Technical Paper 2005-01-1389, 2005, doi:10.4271/2005-01-1389.
Author(s):
Takuya Sakaguchi - Toyota Motor Corp.
Shin Takeuchi - Tokyo University of Science
Yasuo Kogo - Tokyo University of Science
Naohiro Igata - Tokyo University of Science
Katsuhiro Nishiyama - Tokyo University of Science Suwa
Abstract:
We have tried to improve damping capacity of an aluminum alloy by means of dispersing ceramic particles (low damping SiC and high damping NdNbO
4
) of different sizes and volume fractions in the aluminum alloy by powder metallurgy. It is shown that the damping capacity is increased in every case accompanying an increase of Young's modulus. It is also shown that the intrinsic damping capacity of dispersed particles does not play a role in improving the damping capacity. The increase of the damping capacity seems to be attributed to dislocations breakaway, interaction of fine particles and dislocations, and relaxation of interface between ceramic particles and aluminum matrix.
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