Strength of Zirconium Diboride to 2300°C
The strength of zirconium diboride (ZrB2) ceramics was measured up to 2300°C, which are the first reported measurements above 1500°C since 1970. ZrB2 ceramics were prepared from commercially available powder by hot pressing. a mechanical testing apparatus capable of testing material in the ultra-high temperature regime with atmosphere control was built, evaluated, and used. Four-point bend strength was measured as a function of temperature up to 1600°C in air and between 1500°C and 2300°C in argon. Strength between room temperature and 1200°C was ~390 MPa, decreasing to a minimum of ~170 MPa between 1400°C and 1500°C, with strength increasing to ~220 MPa between 1600°C and 2300°C.
E. W. Neuman et al., "Strength of Zirconium Diboride to 2300°C," Journal of the American Ceramic Society, Wiley-Blackwell, Jan 2013.
The definitive version is available at http://dx.doi.org/10.1111/jace.12114
Materials Science and Engineering
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