Microstructural analysis of plastically deformed co-continuous ceramic composite (C{sup 4}) materials
- Ohio State Univ., Columbus, OH (United States). Dept. of Materials Science and Engineering
In the present study, microstructural aspects of the recently discovered co-continuous ceramic composite (C{sup 4}) materials have been evaluated, and their response to plastic deformation by both tensile strain and Vickers indentation has been characterized. The microstructure was studied using high resolution scanning electron imaging (SEM) and analytical transmission electron microscopy (TEM). The SEM results obtained show evidence of crack blunting in the aluminum phase, and the presence of microcracking in the alumina phase. The TEM results demonstrate a high dislocation density in the aluminum phase after testing which is indicative of significant deformation. The aluminum phase toughens the brittle alumina phase of the C{sup 4} material, allowing both elastic and plastic deformation behavior. This is remarkable since the alumina-aluminum ratio is in the region of 2 (Al{sub 2}O{sub 3}) to 1 (Al).
- OSTI ID:
- 62982
- Report Number(s):
- CONF-941016-; ISBN 0-87339-247-7; TRN: IM9527%%33
- Resource Relation:
- Conference: Materials week `94, Rosemont, IL (United States), 3-7 Oct 1994; Other Information: PBD: 1994; Related Information: Is Part Of High performance composites: Commonalty of phenomena; Chawla, K.K. [ed.] [New Mexico Inst. of Mining and Technology, Socorro, NM (United States)]; Liaw, P.K. [ed.] [Univ. of Tennessee, Knoxville, TN (United States)]; Fishman, S.G. [ed.] [Office of Naval Research, Arlington, VA (United States)]; PB: 549 p.
- Country of Publication:
- United States
- Language:
- English
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