Decipher the ultra-high strengthening and toughening efficiency of GNS-MgO/Mg layered composite with in-situ enhanced interface

Xiang, Yeyang; Wang, Xiaojun; Shi, Hailong; Hu, X.S.; Xu, Chao; Zhang, Qiang

doi:10.1016/j.carbon.2022.04.063

Cited by 9 publications

(3 citation statements)

References 32 publications

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“…Although Mg-matrix composites reinforced with CNTs have shown success in improving strength and toughness [10][11][12][13], several challenges remain unresolved, and the preparation method and toughening mechanism are not fully developed. Due to the ultrahigh strengthening efficiency of the CNTs/Mg layered structure, this structure is considered to be the main cause of high back stresses, but its toughening mechanism has not yet been investigated [10].…”

Section: Introductionmentioning

confidence: 99%

“…Due to the ultrahigh strengthening efficiency of the CNTs/Mg layered structure, this structure is considered to be the main cause of high back stresses, but its toughening mechanism has not yet been investigated [10]. Flake powder metallurgy [14], EPD [10], and spray deposition [13,15] are commonly used methods to prepare carbon nanophase-reinforced layered metal-matrix composites. However, the flammable and oxidative properties of Mg powder render the flake powder metallurgical method unsuitable for preparing Mg-matrix composites.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of Structure-Function Integrated Layered CNT/Mg Composites

Deng,

Zou,

Liao

et al. 2024

Materials

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Magnesium (Mg)-matrix composites have excellent damping and electromagnetic shielding properties. However, the mismatch between their strength and toughness limits their wide application. The aim of this work is to overcome the strength-toughness mismatch by constructing micro- and nanostructures while maintaining the good functional properties of Mg-matrix composites. Electrophoretic deposition (EPD) was used to spread carbon nanotubes (CNTs) out evenly on a Mg foil matrix. After spark plasma sintering (SPS), the grain organisation was refined, and the interlayer bonding was strengthened by hot rolling deformation. Finally, the microstructure, mechanical properties, damping properties, and electromagnetic shielding properties of the composites were analysed. Compared with the pure Mg laminates, the tensile strength and elongation of the CNT/Mg laminates were increased by 6.4% and 108.4%, respectively, with the significant improvement in toughness resulting from the increase in energy required for crack propagation due to the laminate structure. When the total rolling deflection reaches 80%, the interlayer bond strength of the material is significantly increased, the grain is further refined, and the strength and elongation of the composite material reaches the optimum, with the tensile strength reaching 241.70 MPa and the elongation reaching 6.90%. The interlayer interface and grain refinement also affected the damping Mg and electromagnetic shielding effect of the composites. This work provides an experimental idea for the preparation of high-performance structure-function integrated Mg-based materials.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation of Structure-Function Integrated Layered CNT/Mg Composites

Deng,

Zou,

Liao

et al. 2024

Materials

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“…Therefore, in the steel welding and melting process, magnesium may evaporate directly, which brings great challenges to the welding of magnesium and steel. To date, connections between magnesium and steel have been made, and various welding techniques have been employed [ 1 , 2 , 3 , 4 , 5 , 6 , 7 ]. H. Zhou et al conducted laser fusion welding experiments with aluminum foil in DP590 dual-phase steel and AZ31B magnesium alloy.…”

Section: Introductionmentioning

confidence: 99%

Effect of Laser Welding Parameters on Joint Structure of AZ31B Magnesium Alloy and 304 Stainless Steel

Wan

Zhang

et al. 2022

Materials

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The effects of laser welding parameters on the interface microstructure of AZ31B magnesium alloy and 304 stainless steel were investigated. After welding, a scanning electron microscope and ultra-depth of field microscope were used to observe the microstructure of the welded material, to analyze the effects of power on the interface morphology. The simulation of laser welding of magnesium and steel was carried out by the COMSOL software. The results showed that when the power was 15 W–20 W, the temperature did not reach the melting point of magnesium alloy, there was MgO at the welding, and the interface had poor connection strength. When the power was 35 W–50 W, the temperature reached or even exceeded the boiling point of magnesium alloy, and the interface formed hot cracks, pores, and oxides and had poor joint strength. When the power was 25 W–30 W, the temperature was between the melting point and boiling point of magnesium, and the interface had excellent connection strength.

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