Plastic deformation of alumina reinforced with SiC whiskers

Conference · Tue Jun 01 00:00:00 EDT 1993

OSTI ID:97202

DeArellano-Lopez, A R; Dominguez-Rodriguez, A ^[1]; Goretta, K C; Routbort, J L ^[2]

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1. Seville Univ. (Spain). Dept. Materia Condensada
2. Argonne National Lab., IL (United States)

Addition of small amounts of stiff reinforcement (SiC whiskers) to a polycrystalline AL{sub 2}O{sub 3} matrix partially inhibits grain boundary sliding because of an increase in threshold stress. When the concentration of whiskers is high enough, a pure diffusional mechanism takes over the control of plastic deformation of the composites. For higher whisker loadings, the materials creep properties depend on a microstructural feature different from the nominal grain size. A tentative correlation of this effective microstructural parameter with the spacing between the whiskers was established through a model.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States); Ministerio de Education y Ciencia (Spain)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 97202
• Report Number(s): ANL/ET/CP--80264; CONF-940865--6; ON: DE95015705
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
COMPOSITE MATERIALS
CREEP
REINFORCED MATERIALS
SILICON CARBIDES
WHISKERS