caa a22 4500 463230485 CHVBK 20180405153240.0 cr unu---uuuuu 170326e20070401xx s 000 0 eng 10.1007/s10853-006-1274-2 doi (NATIONALLICENCE)springer-10.1007/s10853-006-1274-2 Effect of hot pressing time and temperature on the microstructure and mechanical properties of ZrB2-SiC [Elektronische Daten] [Alireza Rezaie, William G. Fahrenholtz, Gregory E. Hilmas] Structure-property relations were examined for ZrB2 containing 30 volume percent SiC particulates. Two grades of ZrB2 with initial particle sizes of 2 and 6μm were used. Billets of ZrB2-SiC were produced by hot pressing at 1850, 1950 or 2050°C for 45min. In addition, the material prepared from ZrB2 with an initial particle size of 2μm was hot pressed at 2050°C for 90 and 180min. Microstructures and mechanical properties were characterized to determine the effects of the initial particle size, hot pressing time, and hot pressing temperature on the final grain size and morphology. The average grain size of the ZrB2 phase ranged from 2.2 to 4.7μm. Similarly, the average grain size of the SiC phase ranged from 1.2 to 2.7μm. Hardness and modulus of elasticity were not affected by the processing conditions with average values of 22 and 505GPa, respectively. However, flexural strength decreased as grain size increased from a maximum of ∼1050MPa for the finest grain sizes to ∼700MPa for the largest grain sizes. Analysis suggested that the strength of ZrB2-SiC was limited by the size of the SiC inclusions in the ZrB2 matrix. Springer Science+Business Media, LLC, 2006 Rezaie Alireza Department of Materials Science and Engineering, University of Missouri-Rolla, 65409, Rolla, MO, USA aut Fahrenholtz William G. Department of Materials Science and Engineering, University of Missouri-Rolla, 65409, Rolla, MO, USA aut Hilmas Gregory E. Department of Materials Science and Engineering, University of Missouri-Rolla, 65409, Rolla, MO, USA aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/8(2007-04-01), 2735-2744 0022-2461 42:8<2735 2007 42 10853 https://doi.org/10.1007/s10853-006-1274-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-1274-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rezaie Alireza Department of Materials Science and Engineering, University of Missouri-Rolla, 65409, Rolla, MO, USA aut NATIONALLICENCE 700 1- Fahrenholtz William G. Department of Materials Science and Engineering, University of Missouri-Rolla, 65409, Rolla, MO, USA aut NATIONALLICENCE 700 1- Hilmas Gregory E. Department of Materials Science and Engineering, University of Missouri-Rolla, 65409, Rolla, MO, USA aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/8(2007-04-01), 2735-2744 0022-2461 42:8<2735 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer