A novel laminar oxide composite was developed. This oxide laminate, which was fabricated by hot pressing, consisted of three types of layers, which were stacked in a repeating sequence of YPO 4, yttria-stabilized ZrO 2, 30 vol% yttria-stabilized ZrO 2-70 vol% Al 2O 3, and yttria-stabilized ZrO 2. The behavior of the oxide laminate was evaluated by four-point flexural testing and the indentation technique. The flexural strength from one test was 358 MPa, and the load-displacement curve of this test displayed a graceful failure. Pronounced interfacial delamination contributed to a high work of fracture and damage tolerance. These properties have rarely been observed in oxide composites and are comparable to those of non-oxide composites, such as SiC/graphite, SiC/BN, and Si 3N 4/BN laminates.
|Original language||English (US)|
|Number of pages||4|
|Journal||Journal of the American Ceramic Society|
|State||Published - Sep 1 1997|
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry