Title

Fabrication and Properties of Quasi-Isotropic Silicon Nitride-boron Nitride Fibrous Monoliths

Editor(s)

Singh, J.P.

Abstract

Quasi-isotropic Si3N4/BN fibrous monoliths have been fabricated from single-filament co-extruded green fiber with the [0°/45°/90°]s architecture. They are elasticly isotropic, with room temperature Young's modulus of 216°1 GPa. They exhibit graceful failure in flexure. The peak strength at room temperature is 330 MPa, associated with delamination along on-axis cell boundaries. Off-axis cell boundaries begin to fracture at a proportional limit of 280 MPa. Total work-of-fracture is 4700 J/m2 at room temperature. Graceful fracture also occurs at 1000°C and 1200°C, where the peak strength is 260 MPa and 143 MPa, respectively.

Department(s)

Materials Science and Engineering

Keywords and Phrases

Fibrous Monolithic Ceramics; Green Fiber; Room Temperature; Delamination; Fracture Energy

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2008 John Wiley & Sons, Inc., All rights reserved.


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