Densification, microstructure and properties of ultra-high temperature HfB2 ceramics by the spark plasma sintering without any additives

Efficient fabrication of light C f/SiHfBOC composites with excellent thermal shock resistance and ultra-high-temperature ablation up to 1800 °C

“…It can meet strength and toughness requirements of the ceramics and significantly reduce the weight of ceramic matrix composites [13][14][15]. However, traditional ultra-high-temperature ceramics such as HfB 2 , ZrO 2, and HfO 2 have high density (6.1-12.7 g/cm 3 ) [16][17][18][19] and poor dispersion in a fiber preform skeleton [20]. The current polymer-derived ceramics (PDCs) have the advantages of designable structure, good processability, low preparation temperature, and good high-temperature performance [21][22][23][24][25].…”