Interface Character of Aluminum-Graphite Metal Matrix Composites.
Abstract
The results of the research on aluminum/graphite interfaces described in this final report can be summarized in terms of the experimental approaches used to probe the metal matrix interfaces. The materials studied included the commercial Al/graphite composites; layered model systems on single crystal and polycrystalline graphite substrates as well as glassy carbon substrates; and discontinuous fiber SiC/Al composites. The I/V characterization of the interface demonstrated that the oxide within the interface plays a major role in the interface strength. If the interface was in a low conductivity state, peel test fractures occurred at the interface, weaving through the oxide. When the interface was switched into an electrically conductive state peel test fractures occurred within the single crystal graphite substrate. The interface strength was directly correlatable with its conductivity state in the Al-delta-Al203-(0001) graphite model system. The commercial material measurements were indecisive.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 27, 1983
- Accession Number
- ADA127590
Entities
People
- Harris L. Marcus
Organizations
- University of Texas at Austin