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Silicon/Silicon Carbide Composites Fabricated by Infiltration of a Silicon Melt into Charcoal
Author(s) -
Shin DongWoo,
Park Sam Shik,
Choa YongHo,
Niihara Koichi
Publication year - 1999
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1999.tb02234.x
Subject(s) - materials science , silicon carbide , composite material , silicon , charcoal , flexural strength , porosity , ceramic , silicon monoxide , metallurgy
Dense Si/SiC composites were fabricated via a conventional reaction‐bonding process, using oak charcoal that exhibited a honeycomb structure. The silicon melt was infiltrated into the porous oak charcoal (density of ~0.6 g/cm 3 ) while the sample was heated to 1700°C under vacuum (10 ‐3 torr (~0.133 Pa)), which resulted in in situ silicon‐fiber/SiC composites. The reaction product had an average density of 2.8 g/cm 3 and showed three‐point flexural strengths of 330 MPa at room temperature and 280 MPa at 1300°C. Good oxidation resistance also was observed at temperatures up to 1300°C in flowing air. This process provided excellent shape‐making capability, because the charcoal that was used as a preform was readily machinable.