INFLUENCE OF ALUMINIUM AND HIGH-ENTROPIC ALLOY FeNiCoB0,7Si0,3BeNb ON THE ABRASIVE WEAR RATE OF ULTRA-HIGH-MOLECULAR-WEIGHT POLYETHYLENE
DOI:
https://doi.org/10.18372/0370-2197.1(110).20920Keywords:
ultra-high-molecular-weight polyethylene, aluminium alloy, high-entropy alloy, abrasive wear rateAbstract
The article investigates the influence of industrial B95 aluminium alloy and the high-entropy alloy FeNiCoB0,7Si0,3BeNb on the abrasive wear rate of ultra-high-molecular-weight polyethylene. It is shown that the introduction of both metal fillers increases the wear resistance of ultra-high-molecular-weight polyethylene to the fixed abrasive particles by approximately 50%. This improvement is attributed to the strengthening of the surface layer of the polymer matrix resulting from the incorporation of solid filler particles. This effect is confirmed by an increase in the hardness of the material on the Rockwell scale (HRR) by approximately 35% and a reduction in surface roughness by 40%. It is found that the high-entropy alloy has a more pronounced effect on reducing the abrasive wear rate of the polymer matrix. In both cases, the optimal complex of an optimal combination of functional properties is observed for composite materials containing 25 wt.% of B95 and FeNiCoB0,7Si0,3BeNb alloys. A further increase in the filler concentration in the polyethylene volume results in a reduction in abrasive wear resistance and hardness. This behaviour is explained by an increased number of structural defects in the polymer matrix, which degrade its mechanical integrity and reduce its ability to withstand external loads effectively.
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