遠心燃焼合成法によるNi-Al合金の精密鋳造と異種金属材料への同時接合

抄録

A modified centrifugal combustion synthesis process has been developed that enables precisely casting synthesized materials and simultaneously joining them to a dissimilar metal. The material to be synthesized was a Ni-25 mol%Al alloy and that to be bonded was a stainless steel, an ultra-low carbon steel, pure nickel or a Ni-25 mol%Al alloy. The base material to be bonded; a graphite mold; and a green compact of reactants consisting of Al, Ni and NiO were set in a centrifugal caster. When the combustion synthesis reaction was induced in the centrifugal force field, synthesized molten Ni-Al alloy flew into the mold and collided with the base material. This process was successfully applied in joining the synthesized Ni-Al alloy and various base materials. Centrifugal force was also confirmed to assist the molten Ni-Al alloy fill the mold cavity and adhere to the surface of the base materials.