Spark Plasma Extrusion and the Thermal Barrier Concept

Čelko, Ladislav; Menelaou, Melita; Casas-Luna, Mariano; Horynová, Miroslava; Musálek, T.; Remešová, Michaela; Torre, S.D. De la; Morsi, K.; Kaiser, Jozef

doi:10.1007/s11663-018-1493-3

Cited by 8 publications

(1 citation statement)

References 28 publications

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“…CNTs, because of their distinctive structure and excellent mechanical properties, such as low density, very high strength and toughness, high Young's modulus and tensile strength, good thermal conductivity, good electrical conductivity, etc., are considered to be ideal for nanoscale reinforcement of aluminum matrix composites [5][6][7]. Many scholars have prepared CNT-reinforced aluminum matrix composites using various methods, such as the powder metallurgy method [8], high-energy ball milling method [9], and in situ synthesis method [10]. For example, Li et al [11] reported the preparation of CNT/Al composites by flake powder metallurgy.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Cu-CoatedCarbon-Nanotubes-Reinforced Aluminum Matrix Composites Fabricated by Ultrasonic-Assisted Casting

Dong,

Zeng,

Yan

2024

Metals

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Carbon nanotubes (CNTs) are considered ideal nanoscale reinforcement for the development of high-performance metal matrix composites due to their unique structure and excellent mechanical properties. However, CNTs are easy to agglomerate and have poor wettability with the aluminum matrix, resulting in unsatisfactory effects when added to the aluminum melt. In this study, Cu-coated carbon nanotubes (Cu@CNTs)-reinforced aluminum matrix composites were fabricated by high-energy ultrasonic-assisted casting. Moreover, the effects of different Cu@CNTs content on the microstructure and mechanical properties of aluminum matrix composites were explored. Meanwhile, Fluent 19.0 software was used to further explore the function of ultrasonic vibration in the melt. The results demonstrated that the mechanical properties of composite with 1.2 wt% Cu@CNTs are optimal. Compared with the matrix, the composite with 1.2 wt% Cu@CNTs displayed a 39.3% increase in yield strength, 53.5% increase in ultimate tensile strength, and 5.7% increase in elongation. The simulation results showed that the uniform dispersion of Cu@CNTs and grain refinement can be attributed to the acoustic streaming effect and cavitation effect of high-energy ultrasound. The improvement of the properties of the composites can be attributed to the grain refinement and the load-bearing effect of CNTs.

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