Mechanical characterization of SiC whisker-reinforced MoSi/sub 2/
The mechanical characteristics of an intermetallic matrix with two different reinforcements were studied. The matrix material was MoSi/sub 2/, with either Los Alamos VLS SiC whiskers or Huber VS SiC whiskers. The purpose of the reinforcement was to provide toughening at ambient temperature and strengthening at elevated temperatures. The VLS whiskers greatly improved the yield strength of the matrix at 1200/degree/C, and also increased the room temperature fracture toughness of the matrix. The VS whiskers were added because they are much smaller in length and diameter, and therefore decreased the mean free path between whiskers, at the same volume fraction. The VS whiskers improved the toughness of the matrix at ambient temperature, and increased the yield strength of MoSi/sub 2/ at 1400/degree/C by 470%. The high strength of this new composite places this material in the realm of attractive engineering materials for high-temperature applications. 11 refs., 6 refs., 1 tab.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6889962
- Report Number(s):
- LA-UR-88-3776; CONF-881125-3; ON: DE89003486
- Resource Relation:
- Conference: 3. international symposium on ceramic materials and components for engines, Las Vegas, NV, USA, 27 Nov 1988; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
MOLYBDENUM SILICIDES
MECHANICAL PROPERTIES
SILICON CARBIDES
CERAMICS
COMPOSITE MATERIALS
FRACTURE PROPERTIES
GRAIN BOUNDARIES
HOT PRESSING
TEMPERATURE EFFECTS
WHISKERS
YIELD STRENGTH
CARBIDES
CARBON COMPOUNDS
CRYSTAL STRUCTURE
CRYSTALS
FABRICATION
MATERIALS
MATERIALS WORKING
MICROSTRUCTURE
MOLYBDENUM COMPOUNDS
MONOCRYSTALS
PRESSING
REFRACTORY METAL COMPOUNDS
SILICIDES
SILICON COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360203* - Ceramics
Cermets
& Refractories- Mechanical Properties