文献类型：期刊文献

英文题名：Study on low content short carbon fibers to enhance mechanical properties of ZrB2-SiC composites with improved damage tolerance

作者：He, Linkai[1,5];Wu, Jinhao[2];Meng, Qingnan[3];Sun, Youhong[4];Pan, Jienan[5];Tian, Yun[1,5];Wu, Faquan[1]

机构：[1]Shaoxing Univ, Collaborat Innovat Ctr Prevent & Control Mt Geol H, Sch Civil Engn, Shaoxing, Peoples R China;[2]Jiaxing Nanhu Univ, Sch Mech & Elect Engn, Jiaxing, Peoples R China;[3]Jilin Univ, Coll Construct Engn, Changchun, Peoples R China;[4]China Univ Geosci, Sch Engn & Technol, Beijing, Peoples R China;[5]Henan Polytech Univ, Sch Resources & Environm, Jiaozuo, Peoples R China

年份：2025

卷号：42

外文期刊名：MATERIALS TODAY COMMUNICATIONS

收录：SCI-EXPANDED(收录号：WOS:001402518500001)、、EI(收录号：20245217592815)、Scopus(收录号：2-s2.0-85212956058)、WOS

基金：This study was financially supported by the National Natural Science Foundation of China (No. 42402282 and No. 42207199) , Zhejiang Provincial Postdoctoral Science Foundation (No. ZJ2022155 and No. ZJ2022156)

语种：英文

外文关键词：ZrB2-SiC-Cf composites; Hot pressing; Mechanical properties; Toughening effect; Fiber -matrix reaction

外文摘要：Achieving synergistic improvement of mechanical properties and damage tolerance is one of the issues of great interest in the field of ultra-high-temperature ceramics. In this study, the effect of a low content of short carbon fibers (0, 2, 4, 6, 8, 10, and 20 vol%) on the mechanical properties of ZrB2-SiC ceramics by hot-press sintering was investigated. The incorporation of a small amount of carbon fibers significantly improved the flexural strength, Vickers hardness and fracture toughness of the composites by approximately 60, 12 and 39 %, respectively. These enhancements are attributed to the toughening mechanisms of crack deflection, crack bifurcation, and fiber pullout, and the combined fracture modes that result in typical non-brittle fracture behavior and elevated crack propagation energy. A high sintering temperature increased the relative density of the composite and ensured the reliability of its mechanical properties. However, the high temperature induces the carbon fiber-matrix interface reaction and fiber degradation effect, which limits the improvement in damage tolerance. Therefore, this study reveals the mechanism of the carbon fiber content on the synergistic effect of the mechanical properties and damage tolerance of ZrB2-SiC composites.