Computer synthesis of ceramic preforms for molten-metal infiltration

Conference · Mon Dec 19 00:00:00 EST 1988

OSTI ID:5612839

Halverson, D. C.; Munir, Z. A.; Lum, B. Y. ^[1]

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1. California Univ., Davis, CA (USA)

Capillarity-thermodynamic studies were conducted to obtain contact-angle data of molten aluminum on boride (B{sub 4}C, TiB{sub 2}, AlB{sub 12}) and carbide (TiC, SiC) substrates to illustrate the feasibility of infiltrating preforms containing these phases with aluminum. Techniques for increasing the exothermic potential of self-propagating high-temperature synthesis (SHS) reactions ( exothermic boosting'') are suggested for the fabrication of B{sub 4}C-rich and SiC-rich composite-ceramic preforms for subsequent infiltration with molten aluminum. EXOBOOST, a computer program, has been developed to rapidly screen hundreds of ceramic preform combinations based on SHS thermodynamics and exothermic boosting. Preliminary studies on the SHS of TiC indicate that reactant-greenbody properties strongly influence uniformity in the preform microstructure. 12 refs., 11 figs., 2 tabs.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOD
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5612839
• Report Number(s): UCRL-98854; CONF-8810203-3; ON: DE90000826
• Resource Relation: Conference: International symposium on combustion and plasma synthesis of high temperature materials, San Francisco, CA (USA), 23-26 Oct 1988
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ADDITIONS
E CODES
FABRICATION
ALUMINIUM BORIDES
BORON CARBIDES
SILICON CARBIDES
TITANIUM BORIDES
TITANIUM CARBIDES
COMBUSTION
COMPOSITE MATERIALS
IGNITION
LIQUID METALS
MICROSTRUCTURE
SYNTHESIS
THERMODYNAMICS
ALLOYS
ALUMINIUM ALLOYS
ALUMINIUM COMPOUNDS
BORIDES
BORON COMPOUNDS
CARBIDES
CARBON COMPOUNDS
CHEMICAL REACTIONS
COMPUTER CODES
CRYSTAL STRUCTURE
ELEMENTS
FLUIDS
LIQUIDS
MATERIALS
METALS
OXIDATION
SILICON COMPOUNDS
THERMOCHEMICAL PROCESSES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication