Interface engineering in oxide fiber/oxide matrix composites. Annual report, 1 March 1993-28 February 1994

Technical Report · Mon Feb 28 04:00:00 EST 1994

OSTI ID:7114647

Chawla, K K

The authors 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 an 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. They 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.

• Research Organization: New Mexico Inst. of Mining and Technology, Socorro, NM (United States). Dept. of Metallurgical and Materials Engineering
• OSTI ID: 7114647
• Report Number(s): AD-A-277672/2/XAB; CNN: N00014-89-J-1459
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BOROSILICATE GLASS
CHALCOGENIDES
DOCUMENT TYPES
FIBERS
FRACTURE PROPERTIES
GLASS
INORGANIC ION EXCHANGERS
INTERFACES
ION EXCHANGE MATERIALS
MATERIALS
MATRIX MATERIALS
MECHANICAL PROPERTIES
MINERALS
MULLITE
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PROGRESS REPORT
TENSILE PROPERTIES