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SLEEM Study of MgAl2O4 at Interface betweeen Al2O3 and Matrix in Al2O3/Al Alloy Composite Materials

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Abstract:

In the present talk, MgAl2O4 in the Al2O3/Al-1.0mass%Mg2Si alloy composite was also observed by a scanning electron microscope equipped with the low energy electron (SLEEM) adaptation aiming at examination of its morphology and orientation relationships to the Al2O3 particles. Owing to its much smaller interaction volume of signal exciting electrons in the target and hence more localized information, together with a favorable combination of secondary (SE) and backscattered (BSE) electron signals, the SLEEM method provided much better readable and detailed images of all particles, their shapes and mutual orientations, in comparison with conventional SE and BSE images at the electron energies usually used in the SEM. MgAl2O4 (spinels) were formed on facets of Al2O3 as small particles, and their shape well corresponded to an octahedron consisting of 8 equiaxial triangles.

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Periodical:

Materials Science Forum (Volumes 539-543)

Pages:

779-784

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.539-543.779

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Online since:

March 2007

Authors:

Susumu Ikeno, Kenji Matsuda, I. Müllerová, Luděk Frank

Keywords:

Al-Mg-Si Alloy, Alumina Powder, Composite Material, Scanning Low Energy Electron Microscope (SLEEM), Spinel

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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