Interface Character of Aluminum-Graphite Metal Matrix Composites.
Abstract
The results of the research described in this annual report can be summarized in terms of the experimental approaches used. The TEM studies of the phases in the aluminum-graphite interface demonstrated their complex nature. The method of preparing the thin foils, either chemical etching or chemical polishing, influenced which of the phases were observed. The interface phases observed were oxides, carbides and borides. In the studies of the aluminum deposited on single crystal of graphite the interface oxide formed is a simple aluminum oxide. The thickness of the aluminum oxide layer in the interface of aluminum-graphite junction system appeared to control the switching phenomenon observed in I-V measurements. Two different stable conducting states are present in the memory switching effects after the functions were properly electroformed. These states were dependent on the oxide thickness at the interface. SAM analysis of the fractured junction areas indicate the interface seems to be more cohesive resulting in fracture within the graphite when the thinner oxide layer is present. However, when the thickness of oxide is beyond certain limits( 10nm), the fracture occurs in the oxide/graphite interface region.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 23, 1980
- Accession Number
- ADA096626
Entities
People
- Harris L. Marcus
Organizations
- University of Texas at Austin