Article ID Journal Published Year Pages File Type
1476516 Journal of the European Ceramic Society 2010 6 Pages PDF
Abstract

HfB2-based composites containing 3 vol% silicides of molybdenum or tantalum as sintering additives are densified by spark plasma sintering at 1900–2000 °C. Mechanical properties are measured up to 1500 °C in air. 4-pt Flexural strength values at 1500 °C are 480 MPa (64% of the RT value) for the MoSi2-doped composite and 290 MPa (49% of the RT value) for the TaSi2-doped composite. The fracture toughness is insensitive to the temperature change and reaches 5 MPa m1/2 for the TaSi2-doped ceramic.

Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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