Effect of Graphite on the Mechanical Properties and Tribological Behavior of Aluminum Matrix ‎Nanocomposite

Subject Areas :

Elham Bakhshizade ¹ , Ali Shokuhfar ² , Ashkan Zolriasatein ³ , Mehdi Khodaei ⁴

1 - PhD student/KNT university
2 - Faculty of materials science and engineering,KN Toosi university of technology
3 - Non metallic research group-niroo research institute
4 - KNT university

Received: 2023-02-01 Accepted : 2024-06-20 Published : 2024-03-04

Keywords: Aluminum matrix &lrm, Composite, Graphite, Wear, Mechanical properties,

Abstract :

This study aims to compare the effect of graphite content (0–5 wt.%) on the mechanical and ‎tribological properties of aluminum matrix nanocomposites. The bulk samples were prepared ‎by the mechanical milling/hot pressing (temperature 420 °C/ pressure 400 MPa/ time 1h) ‎process. According to the obtained results in this work, the addition of graphite to an ‎aluminum matrix significantly improves the wear properties of aluminum (wear rate and ‎coefficient of friction). The best wear performance was obtained with the sample containing ‎‎5wt.% graphite, which showed a 62% reduction in the wear rate and a 2.5-fold reduction in ‎coefficient of friction compared to the unreinforced aluminum sample. Although increasing ‎the amount of graphite in the range of 0-5 wt.% leads to a continuous improvement in the ‎wear behavior of the composite material, it results in a simultaneous deterioration of the ‎mechanical properties (hardness and compressive strength) and the density of the Aluminum- ‎Graphite composites.‎

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