Pressureless sintering and physical properties of ZrB2-based composites with ZrSi2 additive

Fully dense ZrB2-based composites with ZrSi2 additive were pressureless-sintered at 1650 °C. The thermal and electrical conductivities of the resulting composites were examined. The effects of ZrSi2 amount on the sinterability and the conductivities of the composites were assessed. The thermal conductivities observed for all of compositions were in the range 74.16–107.16 W (m K)−1. The electrical conductivities observed for all of compositions were in the range 0.96 × 105–1.19 × 105 (Ω cm)−1.