Wetting and infiltration of graphite materials by molten silicon

Journal Article · Wed Feb 01 04:00:00 EST 1995 · Scripta Metallurgica et Materialia

DOI:https://doi.org/10.1016/S0956-716X(99)80068-5· OSTI ID:231111

Li, J G; Hausner, H ^[1]

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1. Technische Universitaet Berlin (Germany). Institut fuer Nichtmetallische Werkstoffe

Wetting-assisted infiltration without the application of external pressure has advantages for the production of complex shaped metal-ceramic composites to near net shape with very low residual porosity. A class of fibrous Si/SiC composites was formed by infiltrating molten silicon into densely packed carbon fibers in preformed shapes. The liquid silicon/solid carbon system may be considered to be a model for reactive wetting and infiltration which is accompanied by the heterogeneous chemical reaction between silicon and carbon to form a solid SiC product layer at the silicon/carbon interface. The wetting behavior of various carbon materials by molten silicon has been extensively investigated recently with the sessile drop method. Some results of this investigation will be reported in the present paper. Attention will be paid to the surface roughness of the substrates on the wetting behavior. The eventual infiltration of silicon into the graphites will be discussed with relation to the wetting.

• OSTI ID: 231111
• Journal Information: Scripta Metallurgica et Materialia, Journal Name: Scripta Metallurgica et Materialia Journal Issue: 3 Vol. 32; ISSN SCRMEX; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBON FIBERS
COMPOSITE MATERIALS
EXPERIMENTAL DATA
FABRICATION
IMPREGNATION
SILICON
SILICON ALLOYS
SILICON CARBIDES
WETTABILITY