Creep of an A1{sub 2}O{sub 3}-SiC(whisker)-TiC(particle) composite.
Journal Article
·
· Mater. Sci. Eng. A
Compressive creep of an electrodischarge-machinable composite, Al{sub 2}O{sub 3}/30.9 vol.% SiC-whiskers/23 vol.% TiC-particles, was studied at 1350-1458 C in inert atmospheres. The microstructure of the deformed specimens was analyzed by scanning and transmission electron microscopy. At stresses below 80 MPa, partially unaccommodated grain-boundary sliding was the rate-controlling mechanism for creep, with a stress exponent of approximately 1 and an activation energy of approximately 470 kJ mol-1. Damage accumulated at stresses above 80 MPa as a consequence of the insufficient diffusional transport of matter. This damage was responsible for an increased stress exponent.
- Research Organization:
- Argonne National Laboratory (ANL)
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 938183
- Report Number(s):
- ANL/ET/JA-27957
- Journal Information:
- Mater. Sci. Eng. A, Journal Name: Mater. Sci. Eng. A Journal Issue: 1 ; Aug. 31, 1998 Vol. 252; ISSN 0921-5093; ISSN MSAPE3
- Country of Publication:
- United States
- Language:
- ENGLISH
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