Thermal properties of La2O3-doped ZrB2- and HfB2-based ultra-high temperature ceramics |
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| Authors: | E. Zapata-Solvas D.D. Jayaseelan P.M. Brown W.E. Lee |
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| Affiliation: | 1. Centre for Advanced Structural Ceramics, Imperial College London, SW7 2AZ, UK;2. Dstl, Porton Down, Salisbury, Wiltshire SP4 0JQ, UK |
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| Abstract: | Thermal properties of La2O3-doped ZrB2- and HfB2-based ultra high temperature ceramics (UHTCs) have been measured at temperatures from room temperature to 2000 °C and compared with SiC-doped ZrB2- and HfB2-based UHTCs and monolithic ZrB2 and HfB2. Thermal conductivities of La2O3-doped UHTCs remain constant around 55–60 W/mK from 1500 °C to 1900 °C while SiC-doped UHTCs showed a trend to decreasing values over this range. |
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| Keywords: | Thermal expansion Specific heat Thermal diffusivity Thermal conductivity High temperature |
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