Effect of the surface oxidation on the flexural strength of the ZrB2–SiC–ZrC ceramic

Graphene NanoPlatelets Reinforced Tantalum Carbide consolidated by Spark Plasma Sintering

“…Furnace oxidation studies have been conducted mostly on ZrB 2 -SiC [37,40,[125][126][127][128] based UHTC materials as well a few studies on HfB 2 [30], and TaC [48]. and 1600 ˚C with soaking times of 20 min.…”

“…ZrB 2 -SiC composites are reinforced with ZrC and oxidized at 1000 ˚C, 1200 ˚C, and 1400 ˚C for up to 60 min [126,127]. The flexural strength of the samples oxidized at 1000 ˚C increased with increasing exposure time and levels out when exposed for 30 min.…”

Volatility diagram of ZrB2‐SiC‐ZrC system and experimental validation

“…Oxidation and ablation behaviors of UHTCs have been extensively investigated over the last 10 years. Among UHTCs, zirconium diboride (ZrB 2 ) and hafnium diboride (HfB 2 ) doped with silicon carbide (SiC) are the mostly studied. Liquid B 2 O 3 produced from the oxidation of ZrB 2 forms a continuous layer on the grain surface and acts as a barrier against further oxygen diffusion below 900°C.…”

Effect of surface oxidation on thermal shock resistance of ZrB 2 –SiC–ZrC ceramic at temperature difference from 800 to 1900 °C

“…However, the oxidation resistance of ZrB 2 -SiC ceramics markedly degrades beyond 1800 • C, as the SiC actively oxidizes to form gaseous SiO and CO or the SiO 2 layer volatilizes [21]. Additionally, there is evidence that incorporating ZrC into the ZrB 2 -SiC ceramics gives even greater protection against oxidation due to increasing the content of ZrO 2 in oxide layer [22].…”