TY - JOUR
T1 - Fabrication, mechanical properties and electrical conductivity of Al2O3 reinforced Cu/CNTs composites
AU - Pan, Yu
AU - Xiao, Shi Qi
AU - Lu, Xin
AU - Zhou, Chuan
AU - Li, Yang
AU - Liu, Zhi Wei
AU - Liu, Bo Wen
AU - Xu, Wei
AU - Jia, Cheng Chang
AU - Qu, Xuan Hui
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China ( 51874037 ) and the Fundamental Research Funds for the Central Universities ( FRF-GF-17-B39 ).
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2019/4/25
Y1 - 2019/4/25
N2 - Copper is widely used in many applications due to its excellent electric conductivity, processing ductility and corrosion resistance. However, poor hardness and low strength are the major limitations of copper in many fields. Herein, we report a high-performance copper matrix composites prepared by powder metallurgy. The copper matrix composites were prepared by mixed acid treatment, molecular-level method, ball milling and spark plasma sintering (SPS) process. The fabrication, microstructure, mechanical properties and electrical conductivity of the composites were investigated. The results show that nano-Al2O3 can act as an active mixing agent to disperse CNTs in copper powders and increase the adhesion between CNTs and copper matrix in composites. Additionally, the uniform dispersion of Al2O3 and CNTs can restrict the grain growth and form a strong bonding interface. Thus, the synthesized Cu-1.5CNTs-0.5Al2O3 composite displays the highest comprehensive performance, such as 131 HV hardness, 345 MPa ultimate tensile strength, 324 MPa yield strength, 13.8% elongation, and 50.6 MS/m (87.2%IACS) electrical conductivity. This work provides a feasible way to prepare high-performance copper matrix composites.
AB - Copper is widely used in many applications due to its excellent electric conductivity, processing ductility and corrosion resistance. However, poor hardness and low strength are the major limitations of copper in many fields. Herein, we report a high-performance copper matrix composites prepared by powder metallurgy. The copper matrix composites were prepared by mixed acid treatment, molecular-level method, ball milling and spark plasma sintering (SPS) process. The fabrication, microstructure, mechanical properties and electrical conductivity of the composites were investigated. The results show that nano-Al2O3 can act as an active mixing agent to disperse CNTs in copper powders and increase the adhesion between CNTs and copper matrix in composites. Additionally, the uniform dispersion of Al2O3 and CNTs can restrict the grain growth and form a strong bonding interface. Thus, the synthesized Cu-1.5CNTs-0.5Al2O3 composite displays the highest comprehensive performance, such as 131 HV hardness, 345 MPa ultimate tensile strength, 324 MPa yield strength, 13.8% elongation, and 50.6 MS/m (87.2%IACS) electrical conductivity. This work provides a feasible way to prepare high-performance copper matrix composites.
KW - AlO
KW - CNTs
KW - Copper matrix composites
KW - Powder metallurgy
UR - http://www.scopus.com/inward/record.url?scp=85059090874&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85059090874&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2018.12.222
DO - 10.1016/j.jallcom.2018.12.222
M3 - Article
AN - SCOPUS:85059090874
VL - 782
SP - 1015
EP - 1023
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
ER -