Journal
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
Volume 27, Issue 6, Pages 1024-1026Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrmhm.2009.06.003
Keywords
Ultra-high temperature ceramics; Zirconium diboride; Molybdenum; Mechanical properties; Hot-pressed sintering
Funding
- MOST [5133102-4]
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ZrB2/Mo composites with various volume fractions of Mo (0-10%) were prepared by a hot-pressing process at 1950 degrees C. The addition of Mo both facilitated the densification and improved the mechanical properties of the ZrB2/Mo composites. Compared with the pure ZrB2 ceramics, the fracture toughness of the ZrB2/Mo (10%) composite increased from 4.52 to 7.98 Mpa m(1/2) and its bending strength increased from 424 to 450 MPa. The enhancement in mechanical properties of the ZrB2/Mo composites could be attributed to the reduced grains and the MoB phase formed in the reaction between ZrB2 and Mo. (C) 2009 Elsevier Ltd. All rights reserved.
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