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<p>This research utilizes 30 nm alumina (Al<sub>2</sub>O<sub>3</sub>) particles and 5–15 µm short carbon nanotubes (CNT) for the production of magnesium (ZK60) alloy hybrid nanocomposites, targeting applications in lightweight structural components. Magnesium-based composites are trending for their ability to fill specific properties in automotive, structural, and aviation applications. Liquid stir casting is a prominent process for making design-free components. However, this process is limited by uneven reinforcement distribution, voids, and porosity. Furthermore, a higher ceramic particle content leads to cluster formation, which, in turn, influences the functional properties of the composites. The current research investigates the microstructural, physical, and mechanical properties of ZK60 alloy hybrid nanocomposites developed via ultrasonic treatment, featuring a semisolid stir-cast process. An effective casting process and the significance of the CNT-Al<sub>2</sub>O<sub>3</sub> hybrid filler in ZK60 provide homogeneous reinforcement distribution, reduced porosity, and an improvement in mechanical properties, as confirmed by microstructural and functional behaviour studies. The 5 wt% CNT/5 wt% Al<sub>2</sub>O<sub>3</sub> hybrid filler promotes the ZK60 as optimum functional properties, including marginal enhancement in actual density (1.845 g/cm<sup>3</sup>), low porosity (0.91%), higher ultimate tensile stress (395 MPa), reduced strain % (10.5%), improved hardness (112 HV0.1), and better fracture toughness (27.3 MPa.m<sup>1/2</sup>).</p>

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Production of ZK60 Magnesium Alloy Hybrid Composites Reinforced with Aluminium Oxide and Carbon Nanotubes through Ultrasonic-Assisted Semisolid Stir Casting

  • 期刊论文

  • 发表日期：

    2026年3月9日

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  • Barun Haldar,
  • K. Karthikeyan,
  • Talapa Reddy Suman Kumar,
  • R. Venkatesh,
  • Ravikumar Jayabal,
  • Abdullah A. Elfar,
  • Ramya Maranan,
  • N. Karthikeyan

摘要

This research utilizes 30 nm alumina (Al2O3) particles and 5–15 µm short carbon nanotubes (CNT) for the production of magnesium (ZK60) alloy hybrid nanocomposites, targeting applications in lightweight structural components. Magnesium-based composites are trending for their ability to fill specific properties in automotive, structural, and aviation applications. Liquid stir casting is a prominent process for making design-free components. However, this process is limited by uneven reinforcement distribution, voids, and porosity. Furthermore, a higher ceramic particle content leads to cluster formation, which, in turn, influences the functional properties of the composites. The current research investigates the microstructural, physical, and mechanical properties of ZK60 alloy hybrid nanocomposites developed via ultrasonic treatment, featuring a semisolid stir-cast process. An effective casting process and the significance of the CNT-Al2O3 hybrid filler in ZK60 provide homogeneous reinforcement distribution, reduced porosity, and an improvement in mechanical properties, as confirmed by microstructural and functional behaviour studies. The 5 wt% CNT/5 wt% Al2O3 hybrid filler promotes the ZK60 as optimum functional properties, including marginal enhancement in actual density (1.845 g/cm3), low porosity (0.91%), higher ultimate tensile stress (395 MPa), reduced strain % (10.5%), improved hardness (112 HV0.1), and better fracture toughness (27.3 MPa.m1/2).