Synchronously constructing networked Si_(3)N_(4) nanowires and interconnected graphene inside carbon fiber composites for enhancing mechanical, friction and anti-ablation properties  

作　　者：Yuming Chen Leilei Zhang Hongwen Nie Siqi Shao Hongchao Sheng Hejun Li 

机构地区：[1]State Key Laboratory of Solidification Processing,Shaanxi Key Laboratory of Fiber Reinforced Light Composite Materials,Northwestern Polytechnical University,Xi’an 710072,China [2]Department of Materials Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China

出　　处：《Journal of Materials Science & Technology》2023年第11期167-175,共9页材料科学技术（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.51872232);the Research Fund of the State Key Laboratory of Solidification Processing(NWPU),China(No.136-QP-2015);the“111”project of China(No.B08040);the National Training Program of Innovation and Entrepreneurship for Undergraduates(No.S202010699336);the Joint Funds of the National Natural Science Foundation of China(No.U21B2067);the Key Scientific and Technological Innovation Research Team of Shaanxi Province(No.2022TD-31);the Key R&D Program of Shaanxi Province(No.2021ZDLGY14-04).

摘　　要：Carbon fiber(C_(f))reinforced pyrolytic carbon(PyC)composites simultaneously possessing robust mechanical strength,excellent friction performances and outstanding anti-ablation properties are demanded for advanced aerospace applications.Efficient architecture design and optimization of composites are promi-nent yet remain high challenging for realizing the above requirements.Herein,binary reinforcements of networked silicon nitride nanowires(Si_(3)N_(4) nws)and interconnected graphene(GE)have been successfully constructed into C f/PyC by precursor impregnation-pyrolysis and chemical vapor deposition.Notably,net-worked Si_(3)N_(4) nws are uniformly distributed among the carbon fibers,while interconnected GE is firmly rooted on the surface of both networked Si_(3)N_(4) nws and carbon fibers.In the networked Si_(3)N_(4) nws and interconnected GE reinforced C_(f)/PyC,networked Si_(3)N_(4) nws significantly boost the cohesion strength of PyC,while GE markedly improves the interface bonding of both Si_(3)N_(4) nws/PyC and fiber/PyC.Benefiting from the synergistic reinforcement effect of networked Si_(3)N_(4) nws and interconnected GE,the C_(f)/PyC have a prominent enhancement in mechanical(shear and compressive strengths increased by 119.9% and 52.84%,respectively)and friction(friction coefficient and wear rate reduced by 25.40% and 60.10%,respectively)as well as anti-ablation(mass ablation rate and linear ablation rate decreased by 71.25% and 63.01%,respectively).This present strategy for networked Si_(3)N_(4) nws and interconnected GE reinforced C_(f)/PyC provides a dominant route to produce mechanically robust,frictionally resisting and ablatively resistant materials for use in advanced aerospace applications.

关 键 词：Networked Si_(3)N_(4)nanowire Interconnected graphene Carbon fiber composite Anti-ablation property 

分 类 号：TB332[一般工业技术—材料科学与工程]