Mechanically robust and abrasion-resistant polymer nanocomposites for potential applications as advanced clearance joints

Qian, Mengbo and Song, Pingan ORCID: https://orcid.org/0000-0003-1082-652X and Qin, Zhe and Yan, Shaozhe and Zhang, Lin (2019) Mechanically robust and abrasion-resistant polymer nanocomposites for potential applications as advanced clearance joints. Composites Part A: Applied Science and Manufacturing, 126:105607. pp. 1-10. ISSN 1359-835X


Abstract

Despite exceptional dimensional stability, polyamide 6 (PA6) still suffers relatively low mechanical strength and stiffness as compared with metallic and ceramic materials, which thus significantly limits its engineering applications. Herein, we have demonstrated the fabrication of high-performance PA6 composites with excellent mechanical and wear resistance by introducing nanoscale silicon carbide (SiC) as the reinforcer and anti-wear agents. The results show that the addition of 5 wt% nanoscale SiC (NS) increases the tensile strength of PA6 by 54% (reaching 64.8 MPa) while the elongation at break is over 6 times (around 304%) of that of the PA6 matrix, which giving rise to a 9.6 times increase in the fracture toughness. Moreover, the addition of 30 wt% of NS reduces the friction coefficient from 0.31 for the PA6 to 0.12, indicating improved anti-wear performances. Such significant improvements in both mechanical and anti-wear properties are primarily due to the high stiffness of NS and the strong interfacial interactions with the PA6 matrix. In addition, the effects of friction coefficient on dynamic characteristics of mechanism with clearance are also investigated to gain an insightful understanding on the improved anti-wear properties. This work provides a facile approach to the design of advanced polymer composites combining excellent mechanical and anti-wear performances.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 25 Jan 2021 01:46
Last Modified: 31 Jan 2021 23:28
Uncontrolled Keywords: PA6; Silicon carbide; Mechanical property; Friction
Fields of Research (2008): 09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
09 Engineering > 0912 Materials Engineering > 091209 Polymers and Plastics
09 Engineering > 0912 Materials Engineering > 091205 Functional Materials
Fields of Research (2020): 40 ENGINEERING > 4016 Materials engineering > 401605 Functional materials
40 ENGINEERING > 4016 Materials engineering > 401609 Polymers and plastics
40 ENGINEERING > 4016 Materials engineering > 401602 Composite and hybrid materials
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Socio-Economic Objectives (2020): 24 MANUFACTURING > 2409 Industrial chemicals and related products > 240910 Plastics
24 MANUFACTURING > 2409 Industrial chemicals and related products > 240908 Organic industrial chemicals (excl. resins, rubber and plastics)
Identification Number or DOI: https://doi.org/10.1016/j.compositesa.2019.105607
URI: http://eprints.usq.edu.au/id/eprint/40578

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