Evolution of the interfacial layer and its effect on mechanical properties in TiO2 nanoparticle reinforced aluminum matrix composites

J. H. Shin, H. J. Choi, D. H. Bae

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7 Citations (Scopus)

Abstract

For aluminum based composites reinforced with titanium dioxide (TiO2), the variations of the interface layer during annealing and their effect on mechanical properties have been investigated. Three different types of reinforcing TiO2 particles (i.e., 15, 50, and 300nm) are used, and the composites are annealed at 500°C for up to 24h. The small 15nm particle with high chemical potential energy can induce the enhanced decomposition process, leading to the extension of the interfacial layer during up to 12h of annealing, in which Ti and O atoms are alloyed in an aluminum structure. The alloyed interface layer has beneficial effects on mechanical properties of aluminum based composites in terms of the elastic modulus and yield stress. Furthermore, elongation to failure increases since the alloyed interfacial layer does not interfere with the movement of dislocations emitted at the interface of the particle, which continuously decomposes and shrinks during annealing. Further annealing stimulates the reduction processes, inducing the formation of α-Al2O3 and Al3Ti in the layer. When the particle size is 300nm, the interfacial evolution behavior cannot be observed at the interface due to the negligible decomposition behavior of the particle under the annealing condition.

Original languageEnglish
Pages (from-to)80-89
Number of pages10
JournalMaterials Science and Engineering A
Volume578
DOIs
Publication statusPublished - 2013 Aug 20

Fingerprint

Aluminum
mechanical properties
Annealing
Nanoparticles
aluminum
Mechanical properties
nanoparticles
annealing
composite materials
Composite materials
matrices
Decomposition
decomposition
Chemical potential
Potential energy
titanium oxides
Titanium dioxide
elongation
Yield stress
Elongation

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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title = "Evolution of the interfacial layer and its effect on mechanical properties in TiO2 nanoparticle reinforced aluminum matrix composites",
abstract = "For aluminum based composites reinforced with titanium dioxide (TiO2), the variations of the interface layer during annealing and their effect on mechanical properties have been investigated. Three different types of reinforcing TiO2 particles (i.e., 15, 50, and 300nm) are used, and the composites are annealed at 500°C for up to 24h. The small 15nm particle with high chemical potential energy can induce the enhanced decomposition process, leading to the extension of the interfacial layer during up to 12h of annealing, in which Ti and O atoms are alloyed in an aluminum structure. The alloyed interface layer has beneficial effects on mechanical properties of aluminum based composites in terms of the elastic modulus and yield stress. Furthermore, elongation to failure increases since the alloyed interfacial layer does not interfere with the movement of dislocations emitted at the interface of the particle, which continuously decomposes and shrinks during annealing. Further annealing stimulates the reduction processes, inducing the formation of α-Al2O3 and Al3Ti in the layer. When the particle size is 300nm, the interfacial evolution behavior cannot be observed at the interface due to the negligible decomposition behavior of the particle under the annealing condition.",
author = "Shin, {J. H.} and Choi, {H. J.} and Bae, {D. H.}",
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AU - Choi, H. J.

AU - Bae, D. H.

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N2 - For aluminum based composites reinforced with titanium dioxide (TiO2), the variations of the interface layer during annealing and their effect on mechanical properties have been investigated. Three different types of reinforcing TiO2 particles (i.e., 15, 50, and 300nm) are used, and the composites are annealed at 500°C for up to 24h. The small 15nm particle with high chemical potential energy can induce the enhanced decomposition process, leading to the extension of the interfacial layer during up to 12h of annealing, in which Ti and O atoms are alloyed in an aluminum structure. The alloyed interface layer has beneficial effects on mechanical properties of aluminum based composites in terms of the elastic modulus and yield stress. Furthermore, elongation to failure increases since the alloyed interfacial layer does not interfere with the movement of dislocations emitted at the interface of the particle, which continuously decomposes and shrinks during annealing. Further annealing stimulates the reduction processes, inducing the formation of α-Al2O3 and Al3Ti in the layer. When the particle size is 300nm, the interfacial evolution behavior cannot be observed at the interface due to the negligible decomposition behavior of the particle under the annealing condition.

AB - For aluminum based composites reinforced with titanium dioxide (TiO2), the variations of the interface layer during annealing and their effect on mechanical properties have been investigated. Three different types of reinforcing TiO2 particles (i.e., 15, 50, and 300nm) are used, and the composites are annealed at 500°C for up to 24h. The small 15nm particle with high chemical potential energy can induce the enhanced decomposition process, leading to the extension of the interfacial layer during up to 12h of annealing, in which Ti and O atoms are alloyed in an aluminum structure. The alloyed interface layer has beneficial effects on mechanical properties of aluminum based composites in terms of the elastic modulus and yield stress. Furthermore, elongation to failure increases since the alloyed interfacial layer does not interfere with the movement of dislocations emitted at the interface of the particle, which continuously decomposes and shrinks during annealing. Further annealing stimulates the reduction processes, inducing the formation of α-Al2O3 and Al3Ti in the layer. When the particle size is 300nm, the interfacial evolution behavior cannot be observed at the interface due to the negligible decomposition behavior of the particle under the annealing condition.

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