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<p>Additive manufacturing for the production of metal goods, including those based on Al–Cu alloys, are being successfully integrated into industrial processes. The increasing demands for the quality of parts and safety in additive manufacturing are driving rapid advancements in this area. This study explores the potential of using a polymer binder based on environmentally friendly and low-cytotoxic natural raw materials—rosin and low-toxic ethylene vinyl acetate (EVA)—to create feedstock for producing Al–Cu parts via material extrusion (MEX) technology. Al–Cu powder with a Cu content of about 5&#xa0;wt.%, characterised by a bimodal particle size distribution, was used to fill the polymer binder. Our results show that the removal of the polymer binder in acetone from the EVA-rosin feedstock occurs significantly faster than that of the commercial polymer binder MC 2162, which is a blend of polyester and polyamide, and is controlled by a diffusion mechanism. The structure, as well as the physical and mechanical properties, of the parts manufactured from feedstocks based on MC 2162 and EVA-rosin, and sintered at 580&#xa0;°C for 4&#xa0;h were nearly identical. The tensile strength measured by three-point bending tests reached approximately 50&#xa0;MPa. Therefore, the EVA-rosin-based binder can be used to produce feedstocks filled with Al–Cu particles suitable for the metal MEX technology.</p>

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Extrusion 3D manufacturing of Al–Cu alloy with EVA-rosin feedstock

  • 期刊论文

  • 发表日期：

    2025年8月2日

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  • Aleksandr Lozhkomoev,
  • Sergey Kazantsev,
  • Ekaterina Vornakova,
  • Maksin Krinitcyn,
  • Natalia Svarovskaya,
  • Elena Glazkova,
  • Ludmila Ivanova,
  • Egor Ryumin,
  • Marat Lerner

摘要

Additive manufacturing for the production of metal goods, including those based on Al–Cu alloys, are being successfully integrated into industrial processes. The increasing demands for the quality of parts and safety in additive manufacturing are driving rapid advancements in this area. This study explores the potential of using a polymer binder based on environmentally friendly and low-cytotoxic natural raw materials—rosin and low-toxic ethylene vinyl acetate (EVA)—to create feedstock for producing Al–Cu parts via material extrusion (MEX) technology. Al–Cu powder with a Cu content of about 5 wt.%, characterised by a bimodal particle size distribution, was used to fill the polymer binder. Our results show that the removal of the polymer binder in acetone from the EVA-rosin feedstock occurs significantly faster than that of the commercial polymer binder MC 2162, which is a blend of polyester and polyamide, and is controlled by a diffusion mechanism. The structure, as well as the physical and mechanical properties, of the parts manufactured from feedstocks based on MC 2162 and EVA-rosin, and sintered at 580 °C for 4 h were nearly identical. The tensile strength measured by three-point bending tests reached approximately 50 MPa. Therefore, the EVA-rosin-based binder can be used to produce feedstocks filled with Al–Cu particles suitable for the metal MEX technology.