Tailoring the geometry of silicon nitride nanofillers to simultaneously strengthen and toughen carbon/carbon composites

作     者：Lei Feng Liyuan Guo Qiang Chen Rui Tian Jiaxu Zhang Qiang Song Peng Wei Caixiang Xiao Qiangang Fu Lei Feng;Liyuan Guo;Qiang Chen;Rui Tian;Jiaxu Zhang;Qiang Song;Peng Wei;Caixiang Xiao;Qiangang Fu

作者机构：School of Materials Science and EngineeringShaanxi University of Science and TechnologyXi’an 710021China State Key Laboratory of Solidification ProcessingNorthwestern Polytechnical UniversityXi’an 710072China Shandong Shengshida Technology Co.Ltd.Jinan 250013China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术(英文版))

年 卷 期：2024年第202卷第35期

页      面：183-191页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the Natural Science Foundation of Shaanxi Province(No.2022JM-225) the National Natural Science Foundation of China(Nos.52272068,52222204,and 52172103) 

主　　题：Carbon/carbon composites Nanoribbons Nanowires Fracture toughness Strength 

摘      要：Incorporating one-dimensional(1D)nanofillers into carbon/carbon composites(C/Cs)can increase their mechanical ***,this method is ineffective in improving the fracture toughness of C/Cs be-cause cracks can easily pass over the 1D nanofillers,resulting in a flat fracture ***,we propose a new technique to significantly improve both the strength and toughness of C/Cs by incorporating 2D ribbon-shaped *** nitride nanoribbons(SiNNRs)are assembled into a film-like structure and inserted into each layer of a carbon fiber laminate,which is then densified with a pyrocarbon *** to the large interfacial contact area between the nanoribbon and matrix,ribbon-shaped SiNNRs can efficiently arrest and deflect cracks in both two and three dimensions,exhibiting a higher reinforcement efficiency than that of slender silicon nitride nanowires(SiNNWs).Mechanical tests show that the per-centage increases in fracture toughness,flexural strength,and compressive strength of C/Cs produced by SiNNRs are approximately 9.8,1.8,and 1.25 times higher than those produced by SiNNWs at the same volume fraction of nanofillers,*** study suggests that 2D ribbon-shaped nanofillers are more effective than 1D fibrous nanofillers in enhancing the strength and toughness of C/Cs.