caa a22 4500 463229436 CHVBK 20180405153237.0 cr unu---uuuuu 170326e20070701xx s 000 0 eng 10.1007/s10853-007-1793-5 doi (NATIONALLICENCE)springer-10.1007/s10853-007-1793-5 DEPP functionally graded piezoceramics via micro-fabrication by co-extrusion [Elektronische Daten] [Paul Alexander, Diann Brei, John Halloran] This paper introduces the Dual Electro/Piezo Property (DEPP) gradient technique via Micro-Fabrication through Co-eXtrusion (MFCX) which pairs a high displacement lead zirconate titanate (PZT) piezoceramic with a high permittivity barium titanate (BT) dielectric. By grading with this material combination spatially across an actuator, the electric field is concentrated in the more active region for improved efficiency, higher displacements, and complex motions. To aid in synthesis and analysis of any gradient profile, compositional maps are provided for key material properties (density, stiffness, permittivity, and piezoelectric coefficients). The DEPP technique was validated, independent of the MFCX process, by powder pressing a conventional bimodal gradient beam which demonstrated through experiments high displacement capabilities at lower driving potentials than comparable functionally graded piezoceramic actuators. For more complex gradients, the MFCX process was adapted to the DEPP gradient technique and illustrated by the fabrication of a linearly graded prototype whose monolithic nature and gradual material variation significantly reduces internal stresses, improves reliability, and extends service lifetime. Springer Science+Business Media, LLC, 2007 Alexander Paul Mechanical Engineering Department, University of Michigan, G.G. Brown Bldg., 2350 Hayward St., 48109-2125, Ann Arbor, MI, USA aut Brei Diann Mechanical Engineering Department, University of Michigan, G.G. Brown Bldg., 2350 Hayward St., 48109-2125, Ann Arbor, MI, USA aut Halloran John Materials Science and Engineering Department, University of Michigan, H.H. Dow Bldg., 2300 Hayward St., 48109-2136, Ann Arbor, MI, USA aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/14(2007-07-01), 5805-5814 0022-2461 42:14<5805 2007 42 10853 https://doi.org/10.1007/s10853-007-1793-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-007-1793-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Alexander Paul Mechanical Engineering Department, University of Michigan, G.G. Brown Bldg., 2350 Hayward St., 48109-2125, Ann Arbor, MI, USA aut NATIONALLICENCE 700 1- Brei Diann Mechanical Engineering Department, University of Michigan, G.G. Brown Bldg., 2350 Hayward St., 48109-2125, Ann Arbor, MI, USA aut NATIONALLICENCE 700 1- Halloran John Materials Science and Engineering Department, University of Michigan, H.H. Dow Bldg., 2300 Hayward St., 48109-2136, Ann Arbor, MI, USA aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/14(2007-07-01), 5805-5814 0022-2461 42:14<5805 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer