Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/77014
Title: Processing and characterisation of carbon nanotube-reinforced magnesium alloy composite foams by rapid microwave sintering
Authors: Akinwekomi, AD 
Law, WC 
Choy, MT 
Chen, L 
Tang, CY 
Tsui, GCP 
Yang, XS 
Keywords: Magnesium alloy
Mechanical properties
Metallic foam
Microwave sintering
Powder metallurgy
Issue Date: 2018
Publisher: Elsevier
Source: Materials science and engineering. A, Structural materials : properties, microstructure and processing, 2018, v. 726, p. 82-92 How to cite?
Journal: Materials science and engineering. A, Structural materials : properties, microstructure and processing 
Abstract: The present study proposes an efficient processing scheme for fabricating carbon nanotubes (CNTs)-reinforced magnesium (Mg) alloy AZ61 composite foams with enhanced compressive and energy absorption properties. The scheme combines powder metallurgy, rapid microwave (MW) sintering, and pore wall reinforcement to overcome the low strength, non-uniform pore structure, prolonged sintering process, and high production cost associated with conventional unreinforced Mg-based foams. In the proposed scheme, a dual-stage mixing method is used to homogeneously disperse and incorporate CNTs into the matrix for strength enhancement, and susceptor role, and carbamide granules are used to control the pore size and porosity fractions. In addition, MW sintering is used to rapidly consolidate the samples in 20 min through the synergy between an external and an internal susceptor (i.e. CNTs), which facilitates uniform and volumetric heating of the entire samples. Thus, sample oxidation and the formation of deleterious secondary phases are minimised, while up to 69% energy is saved. Experimental results show that the dispersion and incorporation of CNTs into the matrix, via the present processing scheme, clearly enhance the compressive and energy absorption properties of the composite foams, as compared with the unreinforced foams. The proposed processing scheme is a rapid and energy-saving efficient technique, which can be used to fabricate high quality Mg alloy composite foams with improved compression and energy absorption properties.
URI: http://hdl.handle.net/10397/77014
ISSN: 0921-5093
EISSN: 1873-4936
DOI: 10.1016/j.msea.2018.04.069
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

3
Last Week
0
Last month
Citations as of Apr 6, 2019

WEB OF SCIENCETM
Citations

3
Last Week
0
Last month
Citations as of Apr 9, 2019

Page view(s)

56
Last Week
1
Last month
Citations as of Jul 16, 2019

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.