Experimental study of aluminum-polytetraflouroethylene functionally graded materials tribological properties
 
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1
University of Babylon. College of Engineering. Mechanical Eng. Dept. Iraq
 
2
University of Babylon. College of Materials Engineering. Iraq
 
These authors had equal contribution to this work
 
 
Submission date: 2024-10-03
 
 
Final revision date: 2025-04-11
 
 
Acceptance date: 2025-05-02
 
 
Online publication date: 2025-05-07
 
 
Publication date: 2025-05-07
 
 
Corresponding author
Nabaa Sattar Radhi   

university of babylon
 
 
 
KEYWORDS
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ABSTRACT
The current work aims to investigate experimentally the sliding wear characteristics of three, four, and five-layers PTFE-Al functionally graded materials (FGMs). FGMs with different layers of (75-25, 50-50, 25-75, and 0-100) wt.% Aluminium and PTFE have been synthesized using the powder compaction technique. The tribological properties of such materials are investigated using a Pin-on-disc wear test machine with three process parameters: applied loads (1, 3, and 5) N, rotational speeds (100, 250, and 450) rpm, and sliding times (5, 10, and 15) minutes. The obtained results show that the wear rate of the PTFE can be mitigated with the existence of the Al. However, it increases with the applied load, sliding distance, and rubbing velocities. It was also noted that the wear rate of the different layers decreases as the weight fraction of Aluminium increases due to the increase of the material hardness. Scanning electron microscope (SEM) with Energy Dispersive X-ray spectrometry (EDS) is used to analyse the worn surfaces. The SEM with EDS analysis showed that the predominant wear of the different functionally graded materials and their layers is an abrasive as a result of the wear debris and score formation.
FUNDING
This research received no external funding.
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