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Strong pinning effect of alumina/nanodiamond composites obtained by pulsed electric current sintering

AuthorsMoya, J. S. ; Torrecillas, Ramón ; Díaz, Luis A. ; Rodríguez Suárez, Teresa ; Goyos, Lidia ; Montes Morán, Miguel Ángel ; Perfilov, S.
KeywordsMechanical properties
Pulsed electric current sintering (PECS)
Issue Date2013
CitationJournal of the European Ceramic Society 33(10): 2043-2048 (2013)
AbstractA small fraction (5vol.%) of detonation nanodiamonds, or DND, acts as a remarkably effective boundary pinning agent in alumina throughout a wide sintering temperature range (from 1200 up to 1700°C). This is the first time that such a strong grain growth inhibitory effect is observed for any of the alumina based composites of similar characteristics reported in the literature. These nanocomposites were consolidated by pulsed electric current sintering (PECS) and present bending strength (550MPa) and toughness (5.2MPam1/2) values significantly higher than the ones corresponding to alumina compacts obtained under the same sintering conditions. © 2013 Elsevier Ltd.
Identifiersdoi: 10.1016/j.jeurceramsoc.2013.01.041
issn: 0955-2219
e-issn: 1873-619X
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