Mechanical Response Anisotropy in Hot-Pressed Silicon Carbide
Abstract
Property anisotropy can exist in sintered ceramics and composites formed by pressure-assistance. Being that hot-pressed silicon carbide (SiC) is a utilized armor ceramic, and its fracture and damage multiaxially occurs in a ballistic impact, interest exists to measure the quasi-static mechanical (fracture and indentation) responses as a function of orientation to identify anisotropy. Flexure strength, fracture toughness, Knoop hardness, and spherical indentation were studied as a function of orientation with respect to the pressing axis in a 40-mm-thick hotpressed SiC tile. Flexure strength and fracture toughness were ~ 25% and 10% lower, respectively, in the plane perpendicular to the pressing axis while hardness was isotropic and the responses from spherical indentation were different but inconclusive.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 07, 2013
- Accession Number
- ADA575502
Entities
People
- A. A. Wereszczak
- D. J. Vuono
- J. Campbell
- J. J. Swab
- K. P. Bortle
- P. J. Ritt
Organizations
- Oak Ridge National Laboratory