Isotropic high-strength aluminum matrix composites reinforced by carbon nanotubes and intra-crystalline nanoparticles

The effective dispersion and distribution control of reinforcements are crucial factors that influence the mechanical properties of metal matrix composites. Here, we propose a strategy to disperse carbon nanotubes in aluminum matrix composites using Ti “nano-grinding balls” as an auxiliary method, a...

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Bibliographic Details
Published inJournal of materials research and technology Vol. 29; pp. 2781 - 2787
Main Authors Li, C.J., Wang, J., Li, X., Xu, Z.Y., Peng, Y.Z., Gao, P., Lu, Q., Tao, J.M., Yi, J.H., Eckert, J.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.03.2024
Elsevier
Subjects
Aluminum matrix composite
Hybrid enhancement
Mechanical property
Reinforcement distribution
Stacking faults
Hybrid enhancement
Stacking faults
Aluminum matrix composite
Mechanical property
Reinforcement distribution
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Summary:The effective dispersion and distribution control of reinforcements are crucial factors that influence the mechanical properties of metal matrix composites. Here, we propose a strategy to disperse carbon nanotubes in aluminum matrix composites using Ti “nano-grinding balls” as an auxiliary method, achieving the interfacial/intragranular distribution of nano-reinforcements. Reinforcements with different interfacial/intragranular dimensions can exert different strengthening effects and induce a high density of stacking faults (SFs) by generating high-stress regions within the grains. As a result, the tensile strength and elongation of the as-sintered composite reach ∼320 MPa and ∼10%, respectively, while maintaining isotropic properties. This work demonstrates an effective method for creating high-density SFs in high stacking fault energy (SFE) metals through proper reinforcement distribution control.
ISSN:2238-7854
DOI:10.1016/j.jmrt.2024.02.020