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Self-Propagating, High Temperature Synthesis As A Technique To Join Metals

Published online by Cambridge University Press:  15 February 2011

J. A. Hawk ,
A. V. Petty ,
C. P. Dogan  and
J. C. Rawers
J. A. Hawk
Affiliation:
U. S. Bureau of Mines, Albany Research Center, Albany, Oregon 97321-2198.
A. V. Petty
Affiliation:
U. S. Bureau of Mines, Albany Research Center, Albany, Oregon 97321-2198.
C. P. Dogan
Affiliation:
U. S. Bureau of Mines, Albany Research Center, Albany, Oregon 97321-2198.
J. C. Rawers
Affiliation:
U. S. Bureau of Mines, Albany Research Center, Albany, Oregon 97321-2198.
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Abstract

Self-propagating, high temperature synthesis (SHS) can be used to bond both similar and dissimilar metals. A unique feature of this technique is the ability to stack either metal foils or metal foils and powder, and to process them to form two-dimensional, layered composites with a “graded” intermetallic interface between layers. This process can also be used to modify a surface for corrosion or wear resistance. To date Bureau of Mines research has focused on making iron-, titanium-, and nickel-aluminum composites. The elemental metal foils are stacked and placed in a hot press, and the temperature is raised until the composite sandwich undergoes the SHS reaction. At approximately 660°C (i.e., the melting point of aluminum), the aluminum reacts with the transition metal to form intermetallic phases. The SHS process is mass and energy limited; i.e., mass transport controls the chemical reaction rates, while the energy liberated by the chemical reaction is distributed to the surroundings by heat conduction, convection and radiation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 314: Symposium R – Joining and Adhesion of Advanced Inorganic Materials , 1993 , 183
Copyright
Copyright © Materials Research Society 1993

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