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:
In this paper, 3D Cf/Si-Ti-C-O composites were prepared with a polytitanocarbosilane (PTC)via polymer infiltration and pyrolysis (PIP) process, and accordingly the mechanical, oxidation resistingand thermal shock resisting properties were investigated. The composites with density of 1.93g·cm-3 showrather high flexural strength (485.3MPa) and fracture toughness (19.95MPa⋅m1/2), and typical non-brittlefracture failure mode. After oxidation treatment at 1300°C for 10 minutes in air, the flexural strength ofthe samples is 306.2MPa, with 63% strength retention. After 5 times of thermal shock tests from roomtemperature to 1300°C, the flexural strength of the samples is 408.9MPa, about 85% strength retention.SEM observation also testifies non-brittle failure because many fibers are pulled out on the fracturesurface. After oxidation treatment, the matrix shows no changes from XRD measurement
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.1242.pdf
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