Characterisation of interfacial reaction in (Al2O3)p/6061 aluminium alloy composite

J. C. Lee; G. H. Kim; H. I. Lee

doi:10.1179/mst.1997.13.3.182

Characterisation of interfacial reaction in (Al₂O₃)_p/6061 aluminium alloy composite

J. C. Lee, G. H. Kim, H. I. Lee

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

The interfacial characterisation of aluminium alloy 6061 reinforced with Al₂O₃ particles was carried out using scanning and transmission electron microscopy on interfacial sections and by X-ray diffraction on the reaction products extracted by electrochemical dissolution. The value of these combined techniques in elucidating the interfacial reaction mechanisms was demonstrated. Single crystals of MgAl₂O₄, of octahedral shape, were observed at the (Al₂O₃)_p/Al interfaces together with surface erosions of (Al₂O₃)_p which formed around the MgAl₂O₄ crystals. In the heat treated composite a reduction in precipitate density in the alloy matrix was observed in the vicinity of the (Al₂O₃)_p. Based on the experimental observations and thermodynamic considerations, the MgAl₂O₄ crystals which formed at the surface of the (Al₂O₃)_p are believed to grow by consuming Al₂O₃.

Original language	English
Pages (from-to)	182-186
Number of pages	5
Journal	Materials Science and Technology
Volume	13
Issue number	3
DOIs	https://doi.org/10.1179/mst.1997.13.3.182
Publication status	Published - 1997
Externally published	Yes

ASJC Scopus subject areas

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

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10.1179/mst.1997.13.3.182

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abstract = "The interfacial characterisation of aluminium alloy 6061 reinforced with Al2O3 particles was carried out using scanning and transmission electron microscopy on interfacial sections and by X-ray diffraction on the reaction products extracted by electrochemical dissolution. The value of these combined techniques in elucidating the interfacial reaction mechanisms was demonstrated. Single crystals of MgAl2O4, of octahedral shape, were observed at the (Al2O3)p/Al interfaces together with surface erosions of (Al2O3)p which formed around the MgAl2O4 crystals. In the heat treated composite a reduction in precipitate density in the alloy matrix was observed in the vicinity of the (Al2O3)p. Based on the experimental observations and thermodynamic considerations, the MgAl2O4 crystals which formed at the surface of the (Al2O3)p are believed to grow by consuming Al2O3.",

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AU - Kim, G. H.

AU - Lee, H. I.

PY - 1997

Y1 - 1997

N2 - The interfacial characterisation of aluminium alloy 6061 reinforced with Al2O3 particles was carried out using scanning and transmission electron microscopy on interfacial sections and by X-ray diffraction on the reaction products extracted by electrochemical dissolution. The value of these combined techniques in elucidating the interfacial reaction mechanisms was demonstrated. Single crystals of MgAl2O4, of octahedral shape, were observed at the (Al2O3)p/Al interfaces together with surface erosions of (Al2O3)p which formed around the MgAl2O4 crystals. In the heat treated composite a reduction in precipitate density in the alloy matrix was observed in the vicinity of the (Al2O3)p. Based on the experimental observations and thermodynamic considerations, the MgAl2O4 crystals which formed at the surface of the (Al2O3)p are believed to grow by consuming Al2O3.

AB - The interfacial characterisation of aluminium alloy 6061 reinforced with Al2O3 particles was carried out using scanning and transmission electron microscopy on interfacial sections and by X-ray diffraction on the reaction products extracted by electrochemical dissolution. The value of these combined techniques in elucidating the interfacial reaction mechanisms was demonstrated. Single crystals of MgAl2O4, of octahedral shape, were observed at the (Al2O3)p/Al interfaces together with surface erosions of (Al2O3)p which formed around the MgAl2O4 crystals. In the heat treated composite a reduction in precipitate density in the alloy matrix was observed in the vicinity of the (Al2O3)p. Based on the experimental observations and thermodynamic considerations, the MgAl2O4 crystals which formed at the surface of the (Al2O3)p are believed to grow by consuming Al2O3.

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Characterisation of interfacial reaction in (Al₂O₃)_p/6061 aluminium alloy composite

Abstract

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