Interface Engineering in Oxide Fiber/Oxide Matrix Composites
Abstract
We have shown in earlier work that significant improvements in the mechanical properties of the alumina + 15 w/o zirconia (PRD-166) fiber/ borosilicate glass matrix and mullite (Nextel 480 and 550) fiber/mullite matrix composites could be achieved using interface engineering approach. This approach involves a control of the microstructure, roughness of the interface, and the thermal expansion mismatch between the fiber and matrix in order to improve the strength and fracture toughness of the composite. We have made a qualitative comparison of the elemental distribution in the PRD-166/glass (N51A) composites, with and without and SnO2 coating, on fibers using secondary ion mass spectrometry (SIMS). The results confirmed that tin dioxide serves as an effective barrier between this fiber and the silica-based glass. The tensile strength and toughness of the interface between SnO2 and flat alumina substrate were obtained by a laser spallation technique.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 28, 1994
- Accession Number
- ADA277672
Entities
People
- K. K. Chawla
Organizations
- New Mexico Institute of Mining and Technology