Strengthened and toughened SiHfBCN-based hightemperature resistant adhesive with SiC NWs  

作　　者：Xingang LUAN Xiyue ZHU Xichao DONG Min LI Laifei CHENG 

机构地区：[1]Science and Technology on Thermostructural Composite Materials Laboratory,Northwestern Polytechnical University,Xi’an 710072,China

出　　处：《Chinese Journal of Aeronautics》2024年第7期539-549,共11页中国航空学报（英文版）

基　　金：co-supported by the National Natural Science Foundation of China (No. 52061135102);the Innovation Training Foundation for College Students of Northwestern Polytechnical University, China (No. 202310699180);the Creative Research Foundation of the Science and Technology on Thermostructural Composite Materials Laboratory

摘　　要：To further improve the performance of binders,a SiHfBCN-based high-temperature resistant adhesive was successfully synthesized by Polymer-Derived Ceramics(PDC)route using TiB2,Polysiloxane(PSO)and short SiC nanowires as fillers.The effect of short SiC nanowires on the adhesive strength at room temperature and high temperature,as well as the reinforcing mechanism was studied.Compared with the adhesive without SiC nanowires,after curing(at 170℃)and pyrolysis(at 1000℃)in air,the appropriate adding of SiC nanowires upgrades the room temperature and high temperature(at 1000℃ in air)adhesive strength to(12.50±0.67)MPa(up by about 32%)and(13.11±0.79)MPa(up by about 106%),respectively.Attractively,under the synergistic impact of the nanowire bridging,nanowire breaking,nanowire drawing and crack deflection,the optimized adhesive exhibits multi-stage fracture,causing the increscent fracture displacement.

关 键 词：High-temperature resistant adhesive SiHfBCN SiC NWs Strengthening TOUGHENING 

分 类 号：V255.4[一般工业技术—材料科学与工程]