Influence of fabrication technique and matrix alloying on the interfacial shear strength of sapphire-NiAl composites
- NASA Lewis Research Center, Cleveland, OH (United States)
- Cleveland State Univ., OH (United States). Chemical Engineering Dept.
The influence of fabrication technique and alloying on the fiber matrix interfacial shear strength, measured using a fiber push-out technique, has been examined in sapphire fiber-reinforced NiAl matrix composites. The composites were fabricated using the powder-cloth (P-C) process, a casting process, and the zone directional solidification (DS) process. The NiAl matrix was alloyed with Cr, W or Yb. The results showed that, in general, cast and DS composites had higher interfacial shear strengths compared to the P-C composites containing binders. Neither matrix alloying nor casting and DS impaired the interface strength. The study highlights the potential of the DS process in designing dual-phase ductile microstructures in sapphire-reinforced NiAl alloys for improved toughness and strength.
- OSTI ID:
- 62952
- Report Number(s):
- CONF-941016--; ISBN 0-87339-247-7
- Country of Publication:
- United States
- Language:
- English
Similar Records
Influence of Cr and W alloying on the fiber-matrix interfacial shear strength in cast and directionally solidified sapphire NiAl composites
Influence of Cr and W alloying on the fiber-matrix interfacial shear strength in cast and directionally solidified sapphire NiAl composites
Related Subjects
ALUMINIUM ALLOYS
CHROMIUM ALLOYS
COMPOSITE MATERIALS
FABRICATION
FRACTURE PROPERTIES
GRAIN BOUNDARIES
INTERFACES
INTERMETALLIC COMPOUNDS
MICROSTRUCTURE
NICKEL ALLOYS
REACTION KINETICS
SAPPHIRE
SCANNING ELECTRON MICROSCOPY
SHEAR PROPERTIES
STRESSES
TUNGSTEN ALLOYS
YTTERBIUM ALLOYS