Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 32, Issue 14, Pages 3675-3683Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2012.05.027
Keywords
Sintering; ZnO; Apatite; FAST/SPS
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Funding
- Office of Naval Research (ONR) [N00014-10-1-0632]
- NSF Grant Opportunities for Academic Liaisons with Industry award (CMMI-GOALI) [0523063]
- Directorate For Engineering [0523063] Funding Source: National Science Foundation
- Div Of Civil, Mechanical, & Manufact Inn [0523063] Funding Source: National Science Foundation
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In order to establish the relative contributions of thermal and athermal mechanisms to densification in the absence of an extrinsic sintering pressure, nanometric powder compacts were sintered with and without applied fields using varied heating rates from 50 degrees C/min up to 800 degrees C/min. The relative contribution of the thermal and athermal mechanistic contributions to the densification behavior of two model dielectric ceramics, hydroxyapatite and zinc oxide, is evaluated in the context of the current leading theories of field-assisted sintering mechanisms. The effects of elevated heating rates in nanometric, dielectric ceramics are found to be minimal in the absence of a field. However, in the presence of an applied field there appears to be a synergistic effect with heating rate. (C) 2012 Elsevier Ltd. All rights reserved.
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