Pressureless Sintering of SiC-Coated Carbon Nanofiber/SiC Composites and Their Properties

• 作 者: GuoshengXU[1]TomohikoYAMAKAMI[1]TomohiroYAMAGUCHI[1]MorinobuENDO[1]SeiichiTARUTA[1]IsaoKUBO[2]
• 机 构: Faculty of Engineering,Shinshu University,Nagano-shi,Japan
• 出 处: The 5th International Congress on Ceramics, ICC5(第五届国际陶瓷大会)
• 发表日期: 2014年期

　　Silicon carbide(SiC)ceramics have many excellent properties.However,the fracture toughness of the pressureless sintered SiC ceramics is low,which is usually 2-3 MPa·m1/2.In our previous study,carbon nanofibers(CNFs)were compounded with SiC and the obtained 3wt%CNFs/SiC composite showed 50%increase in the fracture toughness,compared with the monolithic SiC.The improved fracture toughness resulted from the pullout and/or bridging effect of CNFs bonded with SiC grains much more closely.