What is it about?
The article investigates the main friction dependencies of two distinct extruded wood-plastic composites (WPCs) in a dry friction pair with WC-Co hard alloy strengthened with four different multilayer PVD coatings. The rotating disc (WPC)-flat plate (WC-Co + PVD) scheme was used to conduct the tribological tests using a tribometer. Measurements were made of the sliding distance, normal force and contact temperature. The results of the regression analysis showed that the data obtained are best approximated by a complete second-degree polynomial model. For overall wear and friction effects, the C1-coded coating performed best with both composites. SEM and EDS analyses were also used to examine the surfaces.
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Why is it important?
WPCs, cement carbides, and PVD coatings are extensively utilized and in great demand. Because of their many advantages, such as the use of recycled raw materials that preserve natural resources and address environmental issues, wood-plastic composites are growing in popularity. Cemented carbides, or hard alloys with a predominant tungsten carbide (WC) phase, are among the most technologically advanced and successful materials available today. Their wide range of applications, special qualities, affordable price, and processing capabilities make them more and more in demand. Ultimately, more than 90% of carbide tools are coated, with the physical vapor deposition (PVD) method accounting for the vast majority. However, there is a wide variety of possible WPC compositions, which makes generalizations about friction difficult, and the complexity and importance of the process encourage further research.
Perspectives
Since this is my first article as a PhD candidate, it is valuable. Although there were only a few planned experiments, I am glad that a few more were carried out. Various protective coatings are widely used in the processing of wood-plastic composites with a thermoplastic matrix, but there is a great lack of information on the interaction of such coatings with the investigated composites. My goal is that this article will give readers a better understanding of the intricate behavior of these wood-fiber-reinforced engineering composites in the friction pair with innovative PVD coatings, as well as vital details for material development engineers and end users. It is my hope that these materials will find more beneficial uses and the demand for them and such kind of articles will only grow.
ALMONTAS VILUTIS
Read the Original
This page is a summary of: Frictional behavior of wood-plastic composites against PVD-coated cemented carbide, January 2024, American Institute of Physics,
DOI: 10.1063/5.0190175.
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