ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The dynamic process of crack initiation and propagation in a SiC/BN-Al2O3 laminatedcomposite was observed in situ by scanning electron microscopy. During a bending test with asingle-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 thethrough-thickness crack had grown across the first matrix layer, it was deflected by the next interlayer andagain became an interfacial crack. Interfacial cracks and through-thickness cracks were generatedalternately until the composite failed. The load-displacement plot of the laminated composite exhibitedseveral peaks, each caused by one propagation of a through-thickness crack. The toughening mechanismsof the laminated composite included crack deflection, interfacial cracking, and through-thickness branchcracking
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.368-372.1847.pdf
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