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<p>Sintering is a solid-state consolidation process in which particles are bonded by heating below their melting temperatures. In this work, the effect of Zn addition on the structural and mechanical properties of Al–X wt% Zn alloys (X = 5, 10, 15, 20) has been studied. The alloys were synthesized by solid-state sintering at 200 °C for 2 h in open air. Structural and mechanical characterizations were performed using X-ray diffraction (XRD) with Rietveld refinement, compression testing, and Vickers hardness measurements. XRD confirmed the formation of an α-Al(Zn) solid solution with an fcc structure at low Zn contents, while higher Zn levels promoted secondary Zn-rich phases. Increasing Zn content led to lattice contraction, reduced crystallite size, and higher internal strain, reflecting the role of lattice distortions in strengthening. Compression and hardness tests showed progressive improvement in mechanical performance with Zn addition. Strengthening is mainly attributed to the atomic size mismatch between Al and Zn, which enhances both compressive strength and hardness.</p>

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Effect of Zn Content on the Structural and Mechanical Properties of Al–Zn Alloys Synthesized by Solid-State Sintering

  • 期刊论文

  • 发表日期：

    2026年7月28日

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  • Samah Adjmi,
  • Toufik Hafs,
  • Ali Hafs,
  • Djamel Berdjane,
  • Hayette Boutarfa,
  • Ramazan Ayaz

摘要

Sintering is a solid-state consolidation process in which particles are bonded by heating below their melting temperatures. In this work, the effect of Zn addition on the structural and mechanical properties of Al–X wt% Zn alloys (X = 5, 10, 15, 20) has been studied. The alloys were synthesized by solid-state sintering at 200 °C for 2 h in open air. Structural and mechanical characterizations were performed using X-ray diffraction (XRD) with Rietveld refinement, compression testing, and Vickers hardness measurements. XRD confirmed the formation of an α-Al(Zn) solid solution with an fcc structure at low Zn contents, while higher Zn levels promoted secondary Zn-rich phases. Increasing Zn content led to lattice contraction, reduced crystallite size, and higher internal strain, reflecting the role of lattice distortions in strengthening. Compression and hardness tests showed progressive improvement in mechanical performance with Zn addition. Strengthening is mainly attributed to the atomic size mismatch between Al and Zn, which enhances both compressive strength and hardness.