Iron aluminide-titanium carbide composites: Microstructure and mechanical properties

Conference · Sun Sep 01 04:00:00 EDT 1996

OSTI ID:378693

Subramanian, R; Schneibel, J H; Alexander, K B

Composites of intermetallics and carbides (with binder contents less that 50 vol.%) are considered as potential candidates for applications requiring high wear resistance in corrosive environments. Intermetallics, especially aluminides, provide the corrosion resistance, and the high hardness of the carbide phase contributes to increased wear resistance of the composites. In this study, cost effective and simple processing techniques to obtain FeAl-TiC composites, over a wide range of binder volume fractions, are demonstrated. Binder volume fractions range from 0.15 to 0.7 (18 to 75 wt. % binder). Two techniques - liquid phase sintering of mixed powders and pressureless melt infiltration of TiC preforms was found to be very successful for obtaining fully dense composites with binder volume fractions from 0.15 to 0.3 (18 to 34 wt. %), whereas for higher binder contents liquid phase sintering of mixed powders was the best approach. Mechanical properties of these composites including the 3-point bend strength, fracture toughness and hardness are presented.

• Research Organization: Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States); Oak Ridge Inst. for Science and Education, TN (United States)
• DOE Contract Number: AC05-96OR22464
• OSTI ID: 378693
• Report Number(s): CONF-9606260--2; ON: DE96013782
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM BASE ALLOYS
BINDERS
CERAMICS
CERMETS
FRACTURE PROPERTIES
HARDNESS
INTERMETALLIC COMPOUNDS
IRON ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
POWDERS
SINTERING
TITANIUM CARBIDES