Highly thermal-conductive graphite flake/Cu composites prepared by sintering intermittently electroplated core-shell powders  

作　　者：Hong Sun Nan Deng Jianqiang Li Gang He Jiangtao Li 

机构地区：[1]National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology,CAS Key Laboratory of Green Process and Engineering.Institute of Process Engineering,Chinese Academy of Sciences,Beijing,100190,China [2]University of Chinese Academy of Sciences,Beijing,100049,China [3]School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing,100083,China [4]Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing,100190,China

出　　处：《Journal of Materials Science & Technology》2021年第2期93-99,共7页材料科学技术（英文版）

基　　金：financially supported by the National Key Research and Development Program of China(No.2016YFC0700905);the National Natural Science Foundation of China(Grant No.51674232,No.51972304 and No.51702331)。

摘　　要：Graphite flake/Cu composite has attracted tremendous attention as a promising heat sinks materials owing to its easy machinability and superior thermal properties. However, its preparation process still faces several technological limitations including complex, time-consuming and costly synthetic approaches. In this work, a facile and scalable intermittently electroplated method is applied to prepare Cu-coated graphite flake composite powders, which are subsequently sintered into dense composite bulks. The results show that the graphite flake is successfully coated with a uniform and compact Cu shell,which effectively inhibits the segregation accumulation of graphite flakes and contributes to homogeneous distribution of graphite in the sintered graphite flake/Cu composites. The as-sintered composites exhibit an excellent thermal conductivity of 710 W·m-1·K-1and an outstanding bending strength of 93 MPa. Such performance, together with the simple, efficient powder-preparation process, suggests that the present strategy may open up opportunities for the development of thermal management materials.

关 键 词：Graphite flake ELECTROPLATING Powder processing Thermal properties 

分 类 号：TB333[一般工业技术—材料科学与工程]