Fracture behavior of directionally solidified Y{sub 3}Al{sub 5}O{sub 12}/Al{sub 2}O{sub 3} eutectic fiber
- Univ. of California, Los Angeles, CA (United States). Dept. of Materials Science and Engineering
The strength and fracture of a directionally solidified Y{sub 3}Al{sub 5}O{sub 12}/Al{sub 2}O{sub 3} eutectic fiber were investigated. The fiber was grown continuously by an edge-defined film-fed growth technique. The microstructure was characterized using X-ray diffraction, scanning electron microscopy, and energy-dispersive spectroscopy. The tensile strength and Weibull`s modulus of the eutectic fibers were determined in the as-fabricated state and after extended thermal exposure at 1,460 C in air. Fractographic analysis was used to identify and classify the strength-limiting mechanisms. The fracture toughness and crack growth behavior were characterized by an indentation technique. A fracture mechanics analysis was also used to establish the relationships between surface flaw size, tensile strength, and fracture toughness of the fiber.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 253559
- Journal Information:
- Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 5 Vol. 79; ISSN 0002-7820; ISSN JACTAW
- Country of Publication:
- United States
- Language:
- English
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