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<p>This research investigates the impact of montmorillonite nanoclay (MNs) 0, 1, 2, and 3 wt.% and 10 wt.% silicon carbide (SiC) inclusion on the performance of aluminium hybrid nanocomposites (ANCs). Stir casting with the ultrasonic cavitation method was considered for fabricating the nanocomposites. Microscopic images reveal that SiC and MN are dispersed homogeneously, impeding the dislocation motion, enhancing load transfer by Orowan strengthening. The ANC with 2 wt.% of MN displays the peak mechanical characteristics compared to the as-cast and other composites, with increased stiffness, grain refinement, and higher dislocation density. Higher MN loadings (3 wt.%) lead to agglomeration and premature fracture. The observed wear mechanisms are adhesive and abrasive, with the formation of a tribolayer. In comparison with as-cast LM25, ANC with 2 wt.% MN has 38.28, 8.89, 19.65, 32.42, and 24.21 higher tensile, impact, flexural strength, and modulus, as well as hardness, with 26.11, 66.22, and 28.13 lower ductility, wear loss, and friction coefficient, respectively. The ANC2 composite showed a reduction in i<sub>corr</sub> value by 8, 3, 2.2, and 2-fold compared to the as-cast LM25 alloy, AMC, ANC1, and ANC3, respectively. The SEM pictures of the corroded specimen revealed that all the samples underwent localized corrosion.</p>

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Synergistic Reinforcement of Aluminium Nanocomposites with SiC and Montmorillonite Nanoclay: Mechanical, Tribological and Corrosion Insights

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • M. Anbarasan,
  • G. Perumal,
  • S. Ponnuvel,
  • N. Senthilkumar

摘要

This research investigates the impact of montmorillonite nanoclay (MNs) 0, 1, 2, and 3 wt.% and 10 wt.% silicon carbide (SiC) inclusion on the performance of aluminium hybrid nanocomposites (ANCs). Stir casting with the ultrasonic cavitation method was considered for fabricating the nanocomposites. Microscopic images reveal that SiC and MN are dispersed homogeneously, impeding the dislocation motion, enhancing load transfer by Orowan strengthening. The ANC with 2 wt.% of MN displays the peak mechanical characteristics compared to the as-cast and other composites, with increased stiffness, grain refinement, and higher dislocation density. Higher MN loadings (3 wt.%) lead to agglomeration and premature fracture. The observed wear mechanisms are adhesive and abrasive, with the formation of a tribolayer. In comparison with as-cast LM25, ANC with 2 wt.% MN has 38.28, 8.89, 19.65, 32.42, and 24.21 higher tensile, impact, flexural strength, and modulus, as well as hardness, with 26.11, 66.22, and 28.13 lower ductility, wear loss, and friction coefficient, respectively. The ANC2 composite showed a reduction in icorr value by 8, 3, 2.2, and 2-fold compared to the as-cast LM25 alloy, AMC, ANC1, and ANC3, respectively. The SEM pictures of the corroded specimen revealed that all the samples underwent localized corrosion.