Tribological analysis of ultra-high molecular weight polyethylene composites with boron carbide micro and nanoparticles

E. Lorenzo-Bonet, S. Shaji, J. Negrin-Gonzalez, O. Perez-Acosta, J. A. Ortega-Saenz, M. A.L. Hernandez-Rodriguez*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The goal of this study is to investigate the tribological and morphological changes obtained by addition of boron carbide (B4C) micro and nanoparticles into Ultra High Molecular Weight Polyethylene (UHMWPE/B4C). In this work, UHMWPE was reinforced with B4C micro, nano (powder) and nanoparticles prepared using pulsed laser irradiation in liquid by solvent mixing (SM). Subsequently, the mixtures were compression molded at 180 °C and 15 MPa for 15 min, then cooled for 5 min at different concentrations (0, 0.1, 0.3, and 0.5 wt%) to evaluate the thermal, mechanical, and tribological behavior of these composites. Studies on changes in the structural and morphological characteristics of the composite samples were carried out by means of Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC). The microhardness and scratch hardness of the composites were measured using a diamond indenter revealing nanoparticles outperformed micro-particles in both properties. In addition, the tribological behavior of the hot-pressed composite structures was analyzed via a scratch test machine using a normal load of 10 N and a ball-on-disk tribometer with a normal load of 30 N. As a result, the wear resistance of the composite revealed significant improvement up to a certain amount of particles. The coefficient of friction was also reduced. Worn surface analyses were done on the composite using the confocal and scanning electron microscopy (SEM), indicating various wear mechanisms such as delamination, micro-cutting, micro-plowing, and groove-formation. The composites showed low wear rates and were correlated with scratch hardness.

Original languageEnglish
Article number204861
JournalWear
Volume523
DOIs
Publication statusPublished - 15 Jun 2023
Externally publishedYes

Bibliographical note

Funding Information:
The authors wish to thank “Consejo Nacional de Ciencia y Tecnología” CONACYT for providing a doctoral research fellowship. We are also thankful to CIDET (FIME) and CIIIA for the help provided in the material characterization. Also, the authors express their gratitude to Dr. Demófilo Maldonado Cortésand and The University of Monterrey (UDEM) for access to the confocal microscope.

Publisher Copyright:
© 2023 Elsevier B.V.

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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