Innovative processing of composites for ultra-high temperature applications. Book 2. Annual report

Technical Report · Mon Nov 01 04:00:00 EST 1993

OSTI ID:5039680

Abbaschian, R

The overall objective of this program is to develop intermetallic-matrix composites for structural application above 1200 deg C. The development of intermetallic-matrix composites is motivated by their inherent useful properties such as excellent oxidation resistance, high melting points and relatively low densities. The main disadvantages of intermetallics are poor fracture toughness at ambient temperature and low creep resistance and strength at high temperatures. It is expected that their inherent advantages can be effectively utilized via artificial compositing. The approaches used are to improve fracture toughness via ductile phase toughening, and to increase the creep resistance and strength via high strength ceramic reinforcements such as SiC whiskers. Two classes of alloys have been selected for investigation: (1) molybdenum disilicide MoSi2, and (2) Nb-based aluminides with the major focus on NbAl3.

• Research Organization: Florida Univ., Gainesville, FL (United States). Dept. of Materials Science and Engineering
• OSTI ID: 5039680
• Report Number(s): AD-A-275598/1/XAB; CNN: N00014-91-J-4075
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360601* -- Other Materials-- Preparation & Manufacture
ALLOYS
ALUMINIUM ALLOYS
ALUMINIUM BASE ALLOYS
CREEP
DUCTILITY
FABRICATION
FIBERS
INTERMETALLIC COMPOUNDS
MATERIALS
MATRIX MATERIALS
MECHANICAL PROPERTIES
MOLYBDENUM COMPOUNDS
MOLYBDENUM SILICIDES
NIOBIUM ALLOYS
REFRACTORY METAL COMPOUNDS
REINFORCED MATERIALS
SILICIDES
SILICON COMPOUNDS
TENSILE PROPERTIES
TRANSITION ELEMENT COMPOUNDS