Enhanced mechanical properties and wear resistance of cold-rolled carbon nanotubes reinforced copper matrix composites

Multi-walled carbon nanotube (MWCNT)/Cu composite containing 0.5 vol% MWCNTs were prepared by a high energy ball milling followed by conventional sintering and finally cold rolling. Microstructure studies showed that MWCNTs were uniformly dispersed and implanted inside the Cu matrix. The MWCNT/Cu co...

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Bibliographic Details
Published in:Materials research express 2020-01, Vol.7 (1), p.15069
Main Authors: Van Duong, Luong, Van Luan, Nguyen, Ngoc Anh, Nguyen, Bao Trung, Tran, Danh Chung, Le, Quang Huan, Nguyen, Thi Nhung, Do, Ngoc Minh, Phan, Dinh Phuong, Doan, Van Trinh, Pham
Format: Article
Language:English
Subjects:
Ball milling
Bonding strength
carbon nanotubes
Coefficient of friction
Cold pressing
Cold rolling mills
Copper
Dispersion
Grain boundaries
Load transfer
Low temperature resistance
Mechanical properties
Metal matrix composites
microstructure
Multi wall carbon nanotubes
Self lubrication
Strengthening
Tensile strength
Wear rate
Wear resistance
Yield strength
Yield stress
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Summary:Multi-walled carbon nanotube (MWCNT)/Cu composite containing 0.5 vol% MWCNTs were prepared by a high energy ball milling followed by conventional sintering and finally cold rolling. Microstructure studies showed that MWCNTs were uniformly dispersed and implanted inside the Cu matrix. The MWCNT/Cu composites showed an improvement in hardness and tensile strength up to 37% and 44% respectively compared to those of pure Cu. The enhancement is attributed to the uniform dispersion and strengthening due to the addition of MWCNTs. The yield strength of the composite has been quantified by several strengthening mechanisms including grain boundary strengthening, dislocation strengthening, Orowan strengthening and load transfer. The calculated results indicated that the load transfer strengthening has the largest contribution to the yield strength of the composite which implied the key role of the interfacial bond strength between MWCNTs and Cu matrix on the strengthening behaviors. The friction coefficient and specific wear rate of the composites were reduced with the addition of MWCNT content due to the self-lubrication effect of CNTs and high mechanical properties.
ISSN:2053-1591
2053-1591
DOI:10.1088/2053-1591/ab69c1