Lightweight C_(f)/SiC Composites with High Fiber Content Fabricated by Binder Jetting Additive Manufacturing and Liquid Silicon Infiltration  

作　　者：Shidong Hu Kunhao Feng Qihang Wang Jiangtao Sun Jiaming Yuan Yiwei Mao Daosheng Cai Wenming Jiang Chunsheng Ye Qingsong Wei 

机构地区：[1]State Key Laboratory of Materials Processing and Die&Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan,430074,China

出　　处：《Additive Manufacturing Frontiers》2024年第1期86-95,共10页增材制造前沿(英文)

基　　金：supported by National Defense Basic Scientific Research Program of China(Grant No.JCKY2022213C008);Fundamental Research Funds for the Central Universities of China(Grant No.YCJJ20230353)。

摘　　要：In this study,C_(f)/SiC composites with excellent mechanical and thermal properties were prepared by combining binder jetting(BJ)additive manufacturing with liquid silicon infiltration(LSI)process.The introduction of C_(f)into the C_(f)/SiC mixed powder reduced its spreading ability,which reduced the density,strength,and precision of the C_(f)/SiC green parts.However,phenolic resin infiltration and pyrolysis(PRIP)treatment compensated for the decrease in the density of the green parts resulting from the introduction of C_(f).By optimizing the number of PRIP cycles to increase the pyrolytic carbon(PyC)content in the carbonized parts,the C_(f)in the green parts successfully prevented the reaction with molten Si in the LSI and played an important role in strengthening and toughening the composites.The flexural strength,fracture toughness,and thermal conductivity of the C_(f)/SiC composites reached the maximum values of 316±16 MPa,4.81±0.12 MPa·m1/2,and 140 W/m·K,respectively.This study presents future opportunities for the cost-effective and efficient industrial manufacturing of C_(f)/SiC complex structures.

关 键 词：Carbon fiber reinforced SiC ceramics Additive manufacturing Binder jetting(BJ) Liquid silicon infiltration(LSI) Mechanical properties and thermal properties 

分 类 号：TB3[一般工业技术—材料科学与工程]