ISSN:
1662-8985
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 effect of low-level oxidation (weight loss less than 6wt.%) on mechanical property oftwo-dimension (2D) carbon/carbon (C/C) composites was investigated in present work. C/C sampleswere oxidized in a mixture gas, composed of 10vol%O2 and 90vol%N2, at temperatures of 850°C and1300°C, respectively. The strength of C/C composites before and after oxidation was measured bythree point flexural tests. At different temperature, similar influences of low-level oxidation onmechanical property of C/C samples were observed. As a result, failure of the as-received compositeswas accompanied by brittle, catastrophic reduction in force. As oxidation progressed, the fracturemodel of oxidized samples changed from brittle model to pseudoplastic failure model. Especially, thechanges of flexural strength with the weight loss increasing could be divided into two stages: (i) atlow weight loss, the strength increased with weight loss and is slightly higher than that of theunoxidized composites; (ii) at high weight loss, the strength decreased gradually with the weight loss
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.47-50.455.pdf
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