Field-assisted combustion synthesis of MoSi[sub 2]-SiC composites

Journal Article · Thu Sep 15 04:00:00 EDT 1994 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(94)90220-8· OSTI ID:6982110

Gedevanishvili, S; Munir, Z A ^[1]

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1. Univ. of California, Davis, CA (United States). Dept. of Chemical Engineering and Materials Science

No investigation on the use of self-propagating high-temperature synthesis (SHS) to prepare MoSi[sub 2]/SiC composites has been reported. Reactions to synthesize such composites from elemental powders are not strongly energetic and thus cannot become self-sustaining without the pre-heating of the reactants. The adiabatic combustion temperature of MoSi[sub 2] is 1,900 K, which is at the empirically defined boundary between the occurrence and absence of SHS reactions. Since the adiabatic temperature of SiC is 1,800 K, that of the composite MoSi[sub 2] + x SiC is less than 1,900 K for any value of x. Through the application of an electric field, the authors have recently been successful in forming a variety of materials which are difficult or impossible to prepare by SHS. They report here the results of the first demonstration of the use of SHS to prepare MoSi[sub 2] + x SiC composites for 0 [le] x [le] 1.0.

• OSTI ID: 6982110
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 31:6; ISSN 0956-716X; ISSN SCRMEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360601* -- Other Materials-- Preparation & Manufacture
CARBIDES
CARBON COMPOUNDS
COMPOSITE MATERIALS
FABRICATION
HEAT TREATMENTS
MATERIALS
MOLYBDENUM COMPOUNDS
MOLYBDENUM SILICIDES
REFRACTORY METAL COMPOUNDS
SILICIDES
SILICON CARBIDES
SILICON COMPOUNDS
TRANSITION ELEMENT COMPOUNDS