Effect of Oxide Coverage on the Growth of Amorphous Al2Pt Phase on an Al Surface |
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Authors: | András Kovács Péter B. Barna |
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Affiliation: | (1) Research Institute for Technical Physics and Materials Science of HAS, Konkoly-Thege St. 29-33, H-1121 Budapest, HU |
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Abstract: | In the present experiments the high temperature successive deposition (HTSD) of Al and Pt and the half shadowing technique producing wedge shaped area with increasing quantity of deposited Pt are applied for studying the initial stages of solid phase reaction producing amorphous Al2Pt phase. The nucleation of Al2Pt phase results in a decoration pattern which could be related to the characteristic local oxide coverage of the Al crystal surface developing by kinetic segregation of oxygen species during the Al film deposition. In the area of larger amount of deposited Pt, where the Al2Pt phase is continuous Kirkendall voids are present. The samples were investigated in plane by transmission electron microscopy (TEM) and selected area electron diffraction (SAED) and analysed by energy dispersive X-ray spectroscopy (EDX). |
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Keywords: | : Al Pt amorphous phase TEM Kirkendall voids. |
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