Abstract
This paper describes the fabrication and characterization of a piezoelectric ceramic fiber/aluminum alloy composite using the Interphase Forming/Bonding (IF/B) method. A metal-core piezoelectric ceramic fiber is very fragile and reacts with molten aluminum; therefore, general fabrication processes such as diffusion bonding and casting are difficult to apply. In this study, hot pressing conditions were examined in order to embed a metal-core piezoelectric ceramic fiber, without mechanical damage and loss of piezoelectricity, in an aluminum alloy matrix instead of the pure aluminum matrix used in previous studies. As the results, the proper hot pressing conditions, that is, pressure and temperature of 2.2 MPa and 873 K, respectively, enable the removal of the coarse and fragile eutectic alloy phase from the composite. In addition, the output voltage characteristics of the piezoelectric ceramic fiber/aluminum composite were evaluated by impact testing. The results show that the output voltage generated from the composite is proportional to the square root of impact energy.
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