Microstructural observations of MoSi[sub 2]/SiC composites formed in-situ from reactions between elemental Mo, Si powders and C fibers

Journal Article · Mon Aug 01 00:00:00 EDT 1994 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(94)90282-8· OSTI ID:7174449

Alman, D E; Dogan, C P ^[1]

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1. Bureau of Mines, Albany, OR (United States). Albany Research Center

Silicon carbide reinforced MoSi[sub 2] is emerging as a potential high temperature structural composite. A number of researchers have successfully produced two phase composites in-situ from reactions between elemental powders. To data, the primary thrust of these studies has been to demonstrate the feasibility of forming composites directly from elemental powders by reactive co-synthesis. There has been little effort to control the geometry or morphology of the reinforcement phase, although it is well known that the geometry of the reinforcement may affect the properties (creep, fracture toughness, oxidation resistance) of the resulting composite. This US Bureau of Mines study was initiated to determine the feasibility of controlling the morphology of the reinforcing phase by controlling the morphology (shape) of the starting elemental constituents. Presented here are microstructural observations of reactive synthesized MoSi[sub 2]/SiC composites produced by hot-pressing Mo and Si powders mixed with chopped graphite fibers of varying aspect ratios.

• OSTI ID: 7174449
• Journal Information: Scripta Metallurgica et Materialia; (United States), Vol. 31:3; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
MICROSTRUCTURE
MOLYBDENUM SILICIDES
SILICON CARBIDES
CARBON FIBERS
ELECTRON MICROSCOPY
EXPERIMENTAL DATA
FABRICATION
MORPHOLOGY
X-RAY DIFFRACTION
CARBIDES
CARBON COMPOUNDS
COHERENT SCATTERING
DATA
DIFFRACTION
FIBERS
INFORMATION
MATERIALS
MICROSCOPY
MOLYBDENUM COMPOUNDS
NUMERICAL DATA
REFRACTORY METAL COMPOUNDS
SCATTERING
SILICIDES
SILICON COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360602* - Other Materials- Structure & Phase Studies