caa a22 4500 463233034 CHVBK 20180405153248.0 cr unu---uuuuu 170326e20070701xx s 000 0 eng 10.1007/s10853-006-0456-2 doi (NATIONALLICENCE)springer-10.1007/s10853-006-0456-2 Superplasticity by internal frictional heat under biased cyclic loading [Elektronische Daten] [X. Zhou, A. Mukherjee] A new damping method was developed not only as a testing tool to investigate in situ deformation under stress, but also as a processing method to superplastically deform ceramics. The specific damping capacity (SDC) at low frequencies (<0.2Hz) decreased with increasing frequencies, which matched previous internal friction results. However, at higher frequencies (0.2-5Hz) SDC increased with frequencies, which was explained by a new internal frictional heat mechanism. Three different ceramics: a non-superplastic one and two superplastic ones with different activation energies, showed the same behavior at the high frequency damping tests (1-5Hz). From these results, it was deduced that a cyclic load at high frequencies, superimposed on a static one, has a great potential to enhance superplasticity by specifically heating up grain boundaries from internal frictional heat. Springer Science+Business Media, LLC, 2007 Zhou X. Department of Chemical Engineering and Materials Science, University of California, 95616, Davis, CA, USA aut Mukherjee A. Department of Chemical Engineering and Materials Science, University of California, 95616, Davis, CA, USA aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/13(2007-07-01), 5217-5222 0022-2461 42:13<5217 2007 42 10853 https://doi.org/10.1007/s10853-006-0456-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-0456-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhou X. Department of Chemical Engineering and Materials Science, University of California, 95616, Davis, CA, USA aut NATIONALLICENCE 700 1- Mukherjee A. Department of Chemical Engineering and Materials Science, University of California, 95616, Davis, CA, USA aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/13(2007-07-01), 5217-5222 0022-2461 42:13<5217 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer