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<p>The research on the functional characteristics of the magnesium alloy ZK60 series is enriched by the interface of nano boron carbide (B<sub>4</sub>C) particles and short carbon fibre (CF) through an ultrasonic-assisted stir-cast technique, aiming to achieve uniform B<sub>4</sub>C/CF distribution with improved composite quality and overcome issues with conventional stir casting, such as oxide layer, uneven reinforcement dispersion, and agglomeration. Influences of ultrasonic vibration and actions of ceramic-fibre combinations on surface morphology are analysed via scanning electron microscope with energy dispersive X-ray spectroscopy (SEM-EDS), mechanical behavioural and density/porosity behaviour of synthesized ZK60, ZK60/3% CF, and ZK/ 1-5% of B<sub>4</sub>C composites are investigated with ASTM standards. The results of surface morphological studies revealed that the applied ultrasonic vibration and rated stir speed of 20 kHz and 400 rpm help to achieve homogeneous B<sub>4</sub>C/CF distribution in the ZK60 matrix. Additionally, it led to fine grain boundaries that could occupy the micropores, resulting in a decreased porosity percentage of the composites. However, the ZK60/3% CF/5% B<sub>4</sub>C hybrid composite is identified as having optimum functional behaviours like higher tensile stress (348 MPa), marginal reduction in strain percentage (7.1 %), enhanced energy absorption (38.4 J/cm<sup>2</sup>), hiked microhardness (112 HV), marginal hike in density (1.85 g/cm<sup>3</sup>), and reduced porosity of 0.76 %, which characteristics are better than the ZK60 series magnesium alloy cast. Regarding investigational outcomes, the ZK60/3% CF/5 % B<sub>4</sub>C hybrid composite is suitable for sports bicycle chassis frame applications.</p>

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Enrichment and Characteristics of Studies of ZK60 Magnesium Alloy Composites Embedded with Boron Carbide/Carbon Fibre Through Ultrasonic-Aided Stir Cast Route

  • 期刊论文

  • 发表日期：

    2025年10月7日

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  • Leo Bright Singh,
  • Rishabh Chaturvedi,
  • Aman Shankhyan,
  • Pothamsetty Kasi V. Rao,
  • K. V. Durga Rajesh,
  • Nagabhooshanam Nagarajan,
  • Krishna Babu Sambaru,
  • Ramya Maranan,
  • M. Murali,
  • S. Sathiyamurthy

摘要

The research on the functional characteristics of the magnesium alloy ZK60 series is enriched by the interface of nano boron carbide (B4C) particles and short carbon fibre (CF) through an ultrasonic-assisted stir-cast technique, aiming to achieve uniform B4C/CF distribution with improved composite quality and overcome issues with conventional stir casting, such as oxide layer, uneven reinforcement dispersion, and agglomeration. Influences of ultrasonic vibration and actions of ceramic-fibre combinations on surface morphology are analysed via scanning electron microscope with energy dispersive X-ray spectroscopy (SEM-EDS), mechanical behavioural and density/porosity behaviour of synthesized ZK60, ZK60/3% CF, and ZK/ 1-5% of B4C composites are investigated with ASTM standards. The results of surface morphological studies revealed that the applied ultrasonic vibration and rated stir speed of 20 kHz and 400 rpm help to achieve homogeneous B4C/CF distribution in the ZK60 matrix. Additionally, it led to fine grain boundaries that could occupy the micropores, resulting in a decreased porosity percentage of the composites. However, the ZK60/3% CF/5% B4C hybrid composite is identified as having optimum functional behaviours like higher tensile stress (348 MPa), marginal reduction in strain percentage (7.1 %), enhanced energy absorption (38.4 J/cm2), hiked microhardness (112 HV), marginal hike in density (1.85 g/cm3), and reduced porosity of 0.76 %, which characteristics are better than the ZK60 series magnesium alloy cast. Regarding investigational outcomes, the ZK60/3% CF/5 % B4C hybrid composite is suitable for sports bicycle chassis frame applications.