Transverse Fracture Toughness of Unidirectional and Hybrid Ceramic Matrix Composites

Abstract

Reinforcing ceramic materials with unidirectionally aligned continuous fibers improves the mechanical properties in the fiber direction but often results in reduced transverse strength and toughness. As an effort to improve the transverse characteristics of unidirectional fiber reinforced ceramic matrix composites, randomly dispersed fine whiskers can be added to the matrix. The result is a hybrid ceramic matrix composite. Transversely oriented three-point chevron-notched-beam flexural testing was performed on monolithic cordierite, unidirectional continuous SiC fiber reinforced cordierite and a hybrid combination of continuous SiC fibers and SiC whiskers. The opening mode plane-strain fracture toughness analysis was based on methods presented in ASTM STP-855. The results indicate the transverse fracture toughness of fiber reinforced ceramic matrix composites can be significantly improved with the addition of whiskers to the matrix.

Department(s)

Mechanical and Aerospace Engineering

International Standard Serial Number (ISSN)

0273-4508

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 The Authors, All rights reserved.

Publication Date

01 Jan 1998

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