Demet, Seyit Mehmet2025-10-102025-10-1020252073-4360https://doi.org/10.3390/polym17182434A systematic investigation into the solid particle erosion (SPE) of monolithic, sandwich-type hybrid and multi-scale (Multi Wallet Carbon Nanotube (MWCNT)-reinforced) glass/carbon fiber composites was performed confirming to the ASTM G76-18 standard, utilizing angular alumina erodent (similar to 600 mu m) at 34 m/s across key impingement angles of 30 degrees, 45 degrees, 60 degrees, and 90 degrees. The analysis reveals a profound performance dichotomy dictated by the governing wear mechanism. At the shear-dominated 30 degrees angle, where maximum material loss was observed, hybridization consistently enhanced erosion resistance relative to both monolithic benchmarks. This synergy, however, contrasts sharply with the nuanced behavior under the 90 degrees impact-dominant regime; here, although strategically hybridizing a brittle CFRP with tougher glass fibers reduced the erosion rate (ER) by a remarkable similar to 50%, this benefit was compromised by the matrix embrittlement induced by MWCNT incorporation. This work clarifies the difference between shear-dominated erosion in the ductile regime and fracture toughness under impact-dominated conditions.eninfo:eu-repo/semantics/openAccessSolid Particle ErosionHybrid CompositesMWCNTsArticle10.3390/polym171824342-s2.0-105017371503