NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Investigation of the aluminium-aluminium oxide reversible transformation as observed by hot stage electron microscopy.Thin foils of high purity aluminium and an Al-Al2O3 SAP type of alloy were oxidised in a specially designed hot stage specimen chamber in an electron microscope. Below 450 C, amorphous aluminium oxide formed on the foil surface and was first detectable at foil edges, holes, and pits. Islands of aluminium then nucleated in this amorphous oxide. The aluminium islands displayed either a lateral growth with eventual coalescence with other islands, or a reoxidation process which caused the islands to disappear. The aluminium island formation was determined to be related to the presence of the electron beam. A mechanism based upon electron charging due to the electron beam was proposed to explain the nucleation, growth, coalescence, disappearance, and geometry of the aluminium islands.
Document ID
19720046161
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Grove, C. A.
Judd, G.
Ansell, G. S.
(Rensselaer Polytechnic Institute, Troy, N.Y., United States)
Date Acquired
August 6, 2013
Publication Date
April 1, 1972
Publication Information
Publication: Journal of Materials Science
Volume: 7
Subject Category
Materials, Metallic
Accession Number
72A29827
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available