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Overview: layered metal/intermetallic composites formed by SHS reactions.

Authors
Rawers-JC; Alman-DE; Hawk-JA
Source
Int J Self Prop High Temp Synth 1993 Nov; 2(1):12-24
NIOSHTIC No.
10012264
Abstract
Near-net-shaped metallic/intermetallic composites (MICs) have been successfully produced. These layered composites were formed in situ by initiating self-propagating high-temperature synthesis (SHS) reactions at the interfaces between metal foils. Specifically, aluminum foils were sandwiched between metal foils (Fe, Ni, Ti, and stainless steel) and heated in a hot-press to approximately the melting point of aluminum. An SHS reaction occurred at the metal/aluminum interface, consuming all of the aluminum foil and part of the metal foil, and resulting in a strongly bonded metal/aluminide interface. Thermally aging these MICs resulted in formation of a functionally gradient series of intermetallic phases. Tensile tests showed that failure in the composite always initiated within the intermetallic phase. After numerous cracks occurred within the intermetallic layers, the metal layers subsequently failed in a ductile manner. Preliminary tensile data suggest that the specific strength of the MICs exceeds that of the constituent metals.
Keywords
Author Keywords: metallic-intermetallic composite; layered; aluminide; near-net-shape; specific strength
Contact
U.S. Bureau of Mines, 1450 Queen Avenue SW, Albany, OR 97321-2198
CODEN
ISHSE3
Publication Date
19931101
Document Type
Journal Article
Fiscal Year
1994
NTIS Accession No.
NTIS Price
Identifying No.
OP 300-93
Issue of Publication
1
ISSN
1061-3862
NIOSH Division
ALRC
Source Name
International Journal of Self-Propagating High-Temperature Synthesis
State
OR
TOP