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<p>The objective of the present work is to obtain and evaluate the influence of the addition of different concentrations of particulate reinforcement in the production of commercially pure aluminum composites reinforced with blast furnace slag. The samples were prepared at concentrations of 0, 5, 10, and 15 wt% of slag. All samples were subjected to uniaxial compaction at 530&#xa0;MPa and sintered in a nitrogen atmosphere at 620&#xa0;°C for 2&#xa0;h. Density measurements were carried out before and after sintering. Mechanical and morphological characterization was carried out using Vickers micro-hardness measurements, three-point bending tests, pin-on-disk wear tests, and scanning electron microscopy. As result, the materials showed an average relative density greater than 97% of the theoretical density, reaching more than 98% for pure aluminum. The composites showed a uniform distribution of reinforcement particles and a progressive improvement in mechanical properties with an increase in slag concentration, practically doubling the value of the Young’s modulus for a 15% slag concentration. Such results give the blast furnace slag a new possibility of exploitation in the metal-mechanical sector, besides contributing to the environmental issue.</p> Graphical abstract <p></p>

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Study of slag different concentrations influence on the mechanical properties of particulates aluminum matrix composites produced by powder metallurgy

  • 期刊论文

  • 发表日期：

    2025年3月6日

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  • Emmanuel P. R. Lima,
  • Edison G. C. Galárraga,
  • Igor C. da Silva,
  • Abraão P. Dias

摘要

The objective of the present work is to obtain and evaluate the influence of the addition of different concentrations of particulate reinforcement in the production of commercially pure aluminum composites reinforced with blast furnace slag. The samples were prepared at concentrations of 0, 5, 10, and 15 wt% of slag. All samples were subjected to uniaxial compaction at 530 MPa and sintered in a nitrogen atmosphere at 620 °C for 2 h. Density measurements were carried out before and after sintering. Mechanical and morphological characterization was carried out using Vickers micro-hardness measurements, three-point bending tests, pin-on-disk wear tests, and scanning electron microscopy. As result, the materials showed an average relative density greater than 97% of the theoretical density, reaching more than 98% for pure aluminum. The composites showed a uniform distribution of reinforcement particles and a progressive improvement in mechanical properties with an increase in slag concentration, practically doubling the value of the Young’s modulus for a 15% slag concentration. Such results give the blast furnace slag a new possibility of exploitation in the metal-mechanical sector, besides contributing to the environmental issue.

Graphical abstract