Fracture Strength Behaviors of Ultra-High-Temperature Materials

Abstract

Ultra-high-temperature materials have been widely used as key components in high-end equipment. However, the existing studies are mainly conducted at room and moderate temperatures. Besides, they are mainly carried out by experiments. Theories on the temperature dependence of fracture strength are rarely reported. In this work, experimental methods for the ultra-high-temperature tensile properties of advanced materials and the elastic–plastic properties of coatings are developed, respectively, based on induction heating and radiation furnace heating technologies. A temperature-dependent fracture strength model for ceramics is proposed in the view of energy. The experimental methods and theoretical model are verified on the 2D plain-weave carbon fiber reinforced silicon carbide thermal structure composite, yttria-stabilized zirconia thermal barrier coating, and Si3N4 ceramics. The study shows that the mechanical properties of materials decrease significantly at ultra-high temperatures. The results are useful for the applications of ultra-high-temperature materials in thermal structure engineering.

Influence of weaving parameters on thermal protection performance of gradient3Dwoven composite

“…Existing studies have focused on the mechanical performance of materials, and most of them have studied plain and satin textile materials. 17,18 The weaving parameters of fabric have significant impact on the ablation performance of TPM. For example, the effect of weaving parameters on the ablation performance of plain and satin woven materials has been studied, and it has been shown that they do have a nonnegligible effect.…”

“…Studies have shown that the weaving parameters of fabric have significant influence on various properties of woven composites, such as strength, 14 surface friction, 15 impact, 16 and so forth. Existing studies have focused on the mechanical performance of materials, and most of them have studied plain and satin textile materials 17,18 . The weaving parameters of fabric have significant impact on the ablation performance of TPM.…”