Abstract
Eight types of oxide laminates consisting of combinations of xenotime (YPO4) with zirconia (ZrO2), and monazite (LaPO4) with ZrO2 were studied. Four of the laminates were YPO4-containing ZrO2 laminates. The other four materials were LaPO4-containing ZrO2 laminates. They were fabricated by repeatedly stacking two or three kinds of tape-cast layers, lamination, organic burnout and consolidation by hot-pressing. High strength (360, 390 MPa) and apparent work-of-fracture (WOF = 8.2, 10 kJ/m2) were measured in one of the YPO4-containing ZrO2 laminate in a stacking sequence of YPO4; yttria stabilized ZrO2 (Y-ZrO2); 30 vol% Y-ZrO2-70 vol% alumina (Al2O3); and Y-ZrO2. A toughening mechanism by means of residual, interlaminar shear stress-enhanced, interface delamination is proposed for these good results. One of the LaPO4-containing ZrO2 laminates, fabricated in a stacking sequence of LaPO4 and 70 vol% doped ZrO2-30 vol% Al2O3, displayed moderate strength and WOF.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 129-136 |
| Number of pages | 8 |
| Journal | Ceramic Engineering and Science Proceedings |
| Volume | 18 |
| Issue number | 4 B |
| State | Published - 1997 |
| Event | Proceedings of the 1997 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures-B - Cocoa, FL, USA Duration: Jan 12 1997 → Jan 16 1997 |
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry