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This study investigates the effect of adding peanut husk-derived Si₃N₄ on load bearing, time dependent and thermal properties of basalt fiber-reinforced polyester composites. The fine Si₃N₄ particles are synthesized via thermo-chemical process and the composites are meticulously prepared using the hand layup method. The composites undergo various characterization methods following ASTM standards. According to the results, the composite, RBS2 produced an improved tensile, flexural and impact values of 131 MPa, 177 MPa and 3.84 J respectively whereas the composite RBS3 produced an improved wear resistance, reduced creep strain, enhanced flame retardance and high thermal stability. It demonstrates a specific wear rate of 0.009 mm³/Nm, coefficient of friction of 0.31 and a low creep strain of 0.0086 mm at 10000 s. It also exhibits a notably high initial decomposition temperature of 410 °C and a …