The development of efficient and quick method to prepare structure-function integrative C/SiC composites is always a major challenge in this feld.Herein,the thermal conductivity and bending strength of C/SiC composite...The development of efficient and quick method to prepare structure-function integrative C/SiC composites is always a major challenge in this feld.Herein,the thermal conductivity and bending strength of C/SiC composites were enhanced simultaneously via continuous high heat conductive channels constructed by continuous wave laser machining and pitch-based high thermal conductivity carbon fber in thickness direction.Results revealed that the thermal conductivity of the modifed C/SiC composites is three times higher than that of referential C/SiC composites due to its highly ordered heat conducive channel in the thickness direction.Importantly,the bending strength of modifed C/SiC composites increased to 457MPa.To better understand the enhance mechanism,the micro-structure for both the composites and heat conductive channel was systematically analyzed.The results demonstrated that the rivet effect of heat conductive channel and the formed two phases structure on the fbers dispersed partial of load and fnally enhanced the property of the composites.In a word,this method holds a nice applicable future in constructing structure-function integrative C/SiC composites.展开更多
基金fnancially supported by Chinese National Foundation for Natural Sciences under Contracts(Nos.92060202,51972269 and 51872229)The Creative Research Foundation of the Science and Technology on Thermostructural Composite Materials Laboratory(No.JCKYS2020607001)State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,China(Wuhan University of Technology,2021-KF-10)。
文摘The development of efficient and quick method to prepare structure-function integrative C/SiC composites is always a major challenge in this feld.Herein,the thermal conductivity and bending strength of C/SiC composites were enhanced simultaneously via continuous high heat conductive channels constructed by continuous wave laser machining and pitch-based high thermal conductivity carbon fber in thickness direction.Results revealed that the thermal conductivity of the modifed C/SiC composites is three times higher than that of referential C/SiC composites due to its highly ordered heat conducive channel in the thickness direction.Importantly,the bending strength of modifed C/SiC composites increased to 457MPa.To better understand the enhance mechanism,the micro-structure for both the composites and heat conductive channel was systematically analyzed.The results demonstrated that the rivet effect of heat conductive channel and the formed two phases structure on the fbers dispersed partial of load and fnally enhanced the property of the composites.In a word,this method holds a nice applicable future in constructing structure-function integrative C/SiC composites.
