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:
An improved chemical liquid vaporized infiltration process was developed to fast densifycarbon/carbon (C/C) composites. A disc-shaped carbon felt was chosen as preform, whose upper andlower sides were fixed and heated simultaneously by two flat surfaces of two heat sources, and theprecursor was heated by the third heat source separated. By this method, carbon felts (bulk density~0.2 g/cm3) were densified to C/C composites with density of 1.29, 1.61 and 1.72 g/cm3 when preparedfor 3h at 900°C, 1000°C and 1100°C, respectively. Scanning electron microscopy (SEM) reveals that thecarbon fibers of the composite are surrounded by ring-shaped pyrocarbon. The deposition process isanalyzed by dividing the reactor into four regions associated with specific functions and the reasons forthe rapid fabrication are proposed as the short convection and diffusion path for the precursor and theexisting thermal gradients across the preform
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.368-372.1038.pdf
Permalink
