EPOXY/PVB HYBRID COMPOSITES REINFORCED WITH NANO-BORON CARBIDE: STRUCTURE, THERMAL STABILITY, AND MECHANICAL RESISTANCE

Abstract

A novel epoxy/poly(vinyl butyral) (PVB) hybrid composite reinforced with nano-boron carbide (B₄C) particles has been developed to explore its potential for high-performance protective coatings and structural applications. Boron carbide, known for its exceptional hardness, wear resistance, and thermal stability, is incorporated into the polymer matrix to enhance mechanical durability, impact resistance, and erosion resistance. B₄C-based composites have also found application in electrochemical energy storage devices due to their chemical stability, electrical conductivity, and corrosion resistance.

A comprehensive characterization of the composite includes scanning electron microscopy (SEM) to assess nano-B₄C dispersion and morphology, differential scanning calorimetry (DSC) to evaluate thermal stability and phase transitions, and Fourier-transform infrared spectroscopy (FTIR) to investigate chemical interactions within the polymer matrix. The mechanical performance is examined through hardness testing, Charpy impact testing, and ultrasonic cavitation resistance measurements, providing insight into the composite’s ability to withstand dynamic loading and erosive environments.

The results demonstrate that nano-B₄C reinforcement significantly improves impact resistance, surface hardness, and cavitation durability, positioning these composites as promising multi-functional materials for potential use in abrasion-resistant coatings, ballistic protection, and aerospace applications, but also in electrochemical industry.