What is it about?
The ZnO/MoS2 nanocomposite was fabricated by CSP exerting a three-component solvent in a proper bulk form to evaluate the mechanical and tribological properties. The XRD and FE-SEM outputs proved that the MoS2 nanoparticles had been successfully embedded through the ZnO substrate with fair distribution. Overall, the optimal value of the MoS2, besides the improved mechanical properties, could reduce the wear rate due to the smoother surface of nanoparticles leading to an improvement in the tribological properties of the ZnO/1% MoS2 nanocomposite. However, the higher MoS2 value (>2%) has reinforced the adhesive mechanism, despite the reduction of the friction coefficient, due to the weakness in hardness and lack of sufficient fracture toughness, reducing the anti-wear properties. The cold sintered ZnO/MoS2 nanocomposite could be defined as a self-lubricant or antiwear nanocomposite that should be progressed in future research.
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Why is it important?
1- Fabrication of ZnO/MoS2 nanocomposite successfully in bulk by cold sintering with a new three-component solvent for anti-wear application. 2- Adding 1% of MoS2 nanoparticles, slightly enhanced the strength, microhardness, and fracture toughness of the cold sintered ZnO/MoS2 nanocomposite 3- In cold sintered ZnO/1%MoS2 nanocomposite, friction coefficient and wear rate have been reduced by 20 and 23%, respectively, compared to pure ZnO. 4- Adding 5% MoS2 nanoparticles reduced the friction coefficient of cold sintered nanocomposite up to 0.26, which could be a self-lubricant nanocomposite. 5- The higher value of MoS2 could dominate the adhesive wear mechanism in cold sintered ZnO/MoS2 nanocomposite.
Perspectives
We fabricated the ZnO/MoS2 nanocomposite in bulk with a three-component solvent through the cold sintering process in the present manuscript. In previous research, the ZnO and MoS2 powders are progressively developed as a coating or additive to modify the tribological or mechanical properties. However, their bulk form could have its particular application never mentioned before. Besides the density, we focused on measuring the strength, microhardness, and fracture toughness of the cold sintered nanocomposite by suitable methods based on the dimension of the prepared sample. The value of MoS2 nanoparticle’s effect on mechanical and tribological properties has been investigated. The friction coefficient, wear rate, and mass loss of cold sintered ZnO/MoS2 nanocomposites has been evaluated. Moreover, the wear mechanism of the cold sintered nanocomposites has been checked to find reasonable reasons for the data variations. These results suggest that cold sintered ZnO/MoS2 nanocomposite can be considered as potential for developing further anti-wear or even self-lubricant applications.
Mr Kaveh Rahimi Mamaghani
Amirkabir University of Technology
Read the Original
This page is a summary of: The Mechanical and Tribological Properties of ZnO/MoS2 Nanocomposite Fabricated by Cold Sintering, Materialia, August 2023, Elsevier,
DOI: 10.1016/j.mtla.2023.101844.
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