Paper Title:
Dynamic Observation of Fracture Process in a Silicon Carbide- Matrix Laminated Ceramic Composite
  Abstract

The dynamic process of crack initiation and propagation in a SiC/BN-Al2O3 laminated composite was observed in situ by scanning electron microscopy. During a bending test with a single-edge notched-beam specimen, an interfacial crack first initiated in the interlayer near the notch tip, after which a through-thickness crack formed in the matrix layer at the notch tip. After the through-thickness crack had grown across the first matrix layer, it was deflected by the next interlayer and again became an interfacial crack. Interfacial cracks and through-thickness cracks were generated alternately until the composite failed. The load-displacement plot of the laminated composite exhibited several peaks, each caused by one propagation of a through-thickness crack. The toughening mechanisms of the laminated composite included crack deflection, interfacial cracking, and through-thickness branch cracking.

  Info
Periodical
Key Engineering Materials (Volumes 368-372)
Edited by
Wei Pan and Jianghong Gong
Pages
1847-1850
DOI
10.4028/www.scientific.net/KEM.368-372.1847
Citation
Y. Zhou, G. J. Yuan, J. F. Tong, L. H. Du, D. M. Chen, H. X. Zhai, "Dynamic Observation of Fracture Process in a Silicon Carbide- Matrix Laminated Ceramic Composite", Key Engineering Materials, Vols. 368-372, pp. 1847-1850, 2008
Online since
February 2008
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$32.00
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