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 SiC/Si multilayer composites were fabricated successfully by reaction sintering methodwith normal stacked papers as the raw materials. Paper was cut into rectangular sheets and stacked, theninfiltrated with phenolic resin to get a laminar structure. This paper /resin laminar composite wastransformed into porous carbon with laminar structure after heating at 800 oC for 2h in N2 atmosphere.Finally this porous laminar carbon was reheated with silicon powder at 1450-1650oC for 1-2h in a vacuumfurnace and SiC/Si multilayer composites can be obtained through the in-situ reaction between carbon andliquid silicon. The microstructure, reaction mechanism, phase composition and mechanical properties ofthese multilayer composites were researched. The final material shows a distingished laminar structurewith alternating arrangement of SiC thick layers and silicon thin layers. SiC layer was composed bybeta-SiC and a little of free silicon and carbon not reacted. The capillarity infiltration and in-situ reactionof liquid silicon act key roles in this process. Higher strength and non-catastrophic failure mode for thismaterial were observed
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.1361.pdf
