TY - JOUR
T1 - Effect of reduced graphene oxides decorated by Ag and Ce on mechanical properties and electrical conductivity of copper matrix composites
AU - Yang, Tao
AU - Chen, Wenge
AU - Yan, Fanlong
AU - Lu, Haibao
AU - Fu, Richard
N1 - Funding Information:
The authors would like to acknowledge the financial supports from Xi’an Science Research Project of China (No. 2020KJRC0089 ) and Shaanxi Coal Industry Group United Fund of China (No. 2019JLM-2 ), and Electrical Materials and Infiltration Key Laboratory of Shaanxi Province, Newton Mobility Grant ( IE161019 ) through Royal Society and the National Natural Science Foundation of China , and Royal academy of Engineering UK-Research Exchange with China and India .
Publisher Copyright:
© 2020
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2021/1/1
Y1 - 2021/1/1
N2 - This work investigated the influence of reduced graphene oxide (rGO) modified with silver (Ag) and cerium (Ce) on mechanical and electrical properties of copper matrix composites. Powders of Ce doped rGO and Ag doped rGO were synthesized using a hydrothermal reduction and an electroless plating (glucose chemical reduction) method, respectively. Then, copper matrix composites with the doped rGO content of 0.25wt% were synthesized using ball milling and spark plasma sintering (SPS). The dispersion of the modified rGO and its bonding with the copper matrix have been signficantly improved. Hardness values of Ce-rGO/Cu and Ag-rGO/Cu composites were 26.3% and 16.4% higher than those of the sintered copper, and 19.4% and 10% higher than that of unmodified rGO/Cu composite. At the same time, the Ce-rGO/Cu and Ag-rGO/Cu composites maintained good conductivity and high ductility (with elongations of 26.3% and 25.2%, respectively). Compared with the sintered copper, the tensile strengths of these two types of copper matrix composites were 7.5% and 12% lower, respectively. The increase in hardness by using the the modified rGOs is mainly due to the grain refinement of the matrix, and the lower value of the tensile strength is due to the defects of the modified rGOs and their poor bonding with the copper matrix.
AB - This work investigated the influence of reduced graphene oxide (rGO) modified with silver (Ag) and cerium (Ce) on mechanical and electrical properties of copper matrix composites. Powders of Ce doped rGO and Ag doped rGO were synthesized using a hydrothermal reduction and an electroless plating (glucose chemical reduction) method, respectively. Then, copper matrix composites with the doped rGO content of 0.25wt% were synthesized using ball milling and spark plasma sintering (SPS). The dispersion of the modified rGO and its bonding with the copper matrix have been signficantly improved. Hardness values of Ce-rGO/Cu and Ag-rGO/Cu composites were 26.3% and 16.4% higher than those of the sintered copper, and 19.4% and 10% higher than that of unmodified rGO/Cu composite. At the same time, the Ce-rGO/Cu and Ag-rGO/Cu composites maintained good conductivity and high ductility (with elongations of 26.3% and 25.2%, respectively). Compared with the sintered copper, the tensile strengths of these two types of copper matrix composites were 7.5% and 12% lower, respectively. The increase in hardness by using the the modified rGOs is mainly due to the grain refinement of the matrix, and the lower value of the tensile strength is due to the defects of the modified rGOs and their poor bonding with the copper matrix.
KW - Copper matrix composites
KW - Electrical conductivity
KW - Mechanical property
KW - Powder metallurgy
KW - Reduced graphene oxides
KW - Spark plasma sintering
UR - http://www.scopus.com/inward/record.url?scp=85093957063&partnerID=8YFLogxK
U2 - 10.1016/j.vacuum.2020.109861
DO - 10.1016/j.vacuum.2020.109861
M3 - Article
SN - 0042-207X
VL - 183
JO - Vacuum
JF - Vacuum
IS - 11
M1 - 109861
ER -