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:
Due to the introduction of oxygen that works to keep the shape of the fibers and enhance theceramic yield during high temperature pyrolysis, air-curing is a critical step during the preparation of thepolymer-derived Si-Al-C-O fibers (KD-A). In this work, to investigate the evolvement of oxygen in thefibers and the influence of oxygen on the mechanical properties of the resulted KD-A fibers, FT-IR, TGA,XRD, SEM and element analysis were performed on the air-curing process of polyaluminocarbosilane(PACS) fibers and the pyrolysis process of the cured PACS fibers. The results showed that the oxygen inthe cured PACS fibers was originated from aluminum aletylacetanate (Al(AcAc)3) and the air-curingprocess, which could be regarded as a constant mass during the pyrolysis. In addition, it was found that themechanical properties of the achieved KD-A fibers were greatly effected by the amount of oxygen in thefibers due to its inhabiting the crystallization of silicon carbide. And the oxygen content which leaded tothe KD-A fibers with the highest tensile strength was found to be 8~10%
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.1287.pdf
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