silicon nitride (Si₃N₄)

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• Published Subscription Original Research Special issue 20 May 2026

  Investigating the Mechanical Properties and Microstructure of AA 7074 Composites with Silicon Nitride Reinforcement

  By V. Ravi Raj, G. Ashwin Prabhu, S. Karthik, Vaddi Seshagiri Rao, SP. Arunkumar, Ameeth Basha I., S. Venkatesan, M. Kalaimani

  Abstract: This study investigates the mechanical and microstructural properties of AA 7074 aluminium alloy reinforced with 1%, 3%, and 5% by weight of silicon nitride (Si₃N₄), fabricated via the stir casting method, intended for structural aerospace applications. A thorough series of mechanical tests—comprising tensile, compression, hardness, impact, flexural, and wear tests—was performed to assess the influence of differing reinforcing content. The composite containing 5 wt% Si₃N₄ (SN5) demonstrated the most pronounced …

  Published in Journal of Polymer & Composites · Vol. 14, Issue 3, 2026 · pp. 268–281 Read article →