Investigation of a SiC/Ti-24Al-11Nb composite
A summary of ongoing research on the characterization of a continuous fiber reinforced SiC/Ti-24Al-11Nb (at percent) composite is presented. The powder metallurgy fabrication technique is described as are the nondestructive evaluation results of the as-fabricated composite plates. Tensile properties of the SiC fiber, the matrix material, and the 0-deg SiC/Ti-24Al-11Nb composite (fibers oriented unidirectionally, parallel to the loading axis) from room temperature to 1100 C are presented and discussed with regard to the resultant fractography. The as-fabricated fiber-matrix interface has been examined by scanning transmission electron microscopy and the compounds present in the reaction zone have been identified. Fiber-matrix interaction and stability of the matrix near the fiber is characterized at 815, 985, and 1200 C from 1 to 500 hr. Measurements of the fiber-matrix reaction, the loss of C-rich coating from the surface of the SiC fiber, and the growth of the Beta depleted zone in the matrix adjacent to the fiber are presented. These data and the difference in coefficient of thermal expansion between the fiber and the matrix are discussed in terms of their likely effects on mechanical properties.
- Research Organization:
- National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center
- OSTI ID:
- 5785103
- Report Number(s):
- N-88-28980; NASA-TM--100956; E--4253; NAS--1.15:100956; CONF-880126--
- Country of Publication:
- United States
- Language:
- English
Similar Records
Fatigue behavior and life prediction of a SiC/Ti-24Al-11Nb composite under isothermal conditions
The corrosion fatigue fractography of Ti-24Al-11Nb
Related Subjects
360603* -- Materials-- Properties
ALLOYS
ALUMINIUM ALLOYS
CARBIDES
CARBON COMPOUNDS
COMPOSITE MATERIALS
ELECTRON MICROSCOPY
EXPANSION
FABRICATION
FRACTOGRAPHY
MATERIALS
MATRIX MATERIALS
MECHANICAL PROPERTIES
METALLURGY
MICROSCOPY
NIOBIUM ALLOYS
POWDER METALLURGY
REINFORCED MATERIALS
SILICON CARBIDES
SILICON COMPOUNDS
TENSILE PROPERTIES
THERMAL EXPANSION
TITANIUM ALLOYS
TITANIUM BASE ALLOYS