Abstract
Combustion synthesis and casting of Ni-25 mol%Al alloy and simultaneous joining to stainless steel, in the field of centrifugal force, have been investigated. In order to produce the Ni-Al alloy in the liquid state, the thermite type combustion synthesis process was adopted. In this process, the reaction temperature can be varied arbitrarily by changing the mixing ratio of the reactants, Ni, Al and NiO. In the present experiments, a cylindrical block of stainless steel was embedded in the basal part of a green compact of the reactants. The green compact was set in a centrifugal caster, and the combustion synthesis reaction was induced in the field of centrifugal force. This process, the centrifugal combustion synthesis, was successfully applied in joining the Ni-Al alloy and the stainless steel. On the other hand, joining did not succeed in the absence of a centrifugal force or close contact between the stainless steel and the green compact.
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