Processing and properties of alumina-graphite platelet composites
- Univ. of Cincinnati, OH (United States). Dept. of Materials Science and Engineering
- McMaster Univ., Hamilton, Ontario (Canada). Dept. of Materials Science and Engineering
Fine-grain Al{sub 2}O{sub 3}-graphite platelet composites have been fabricated by both filter pressing and tape casting with up to 50 vol% of fine or coarse graphite flakes. Filter pressing behavior remains unchanged with coarse graphite flake additions. Strength of hot-pressed specimens decreases from about 350 to about 50 MPa with 50 vol% graphite. Preliminary experiments indicate that platelet orientation has a significant effect on strength: platelets oriented perpendicular to the fracture plane and face-on to the crack front are about 20% weaker than composites with platelets oriented both perpendicular to the fracture plane and edge-on to the crack front. This suggests that the flakes behave as oriented voids in the microstructure.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 69615
- Journal Information:
- Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 5 Vol. 78; ISSN 0002-7820; ISSN JACTAW
- Country of Publication:
- United States
- Language:
- English
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