Abstract
Oxide-oxide laminated composites with aluminum phosphate (AlPO4) and alumina platelets as crack deflecting interphases were developed by the tape casting method. Dense bodies of Al2O3, mullite, 50 vol% Al2O3·50 vol% YAG in situ composite, and 3Y-TZP were sintered and characterized. Tape casting formulations for different oxides with solid contents of 25.1 and 30 vol%, respectively, were developed. XRD indicated compatibility between alumina, mullite, zirconia and AlPO4. Laminated, matrix-interphase composite systems consisting of Al2O3-AlPO4, mullite-AlPO4, 50 vol% Al2O3·50 vol% YAG in situ composite-AlPO4, and 50 vol% Al2O3·50 vol% YAG in situ composite-alumina platelets were made. The 50 vol% Al2O3·50 vol% YAG in situ matrix-alumina platelet composite showed 'quasi-elastic' load-displacement behavior under the conditions of fabrication, and had a 3-point bending strength and work of fracture of 188±8 MPa and 0.65±0.02 kJ/m2, respectively. The 3Y-TZP-AlPO4 laminated composite could not be made because of delamination due to thermal expansion mismatch.
Original language | English (US) |
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Pages (from-to) | 509-514 |
Number of pages | 6 |
Journal | Composites Part B: Engineering |
Volume | 37 |
Issue number | 6 |
DOIs | |
State | Published - 2006 |
Keywords
- Alumina platelets
- Aluminum phosphate
- Bending strength
- Laminated composites
- Tape casting
ASJC Scopus subject areas
- Ceramics and Composites
- Mechanics of Materials
- Mechanical Engineering
- Industrial and Manufacturing Engineering