抄録
Intermetallics-matrix-composite foams were synthesized by a combustion reaction. The elemental powders of nickel and aluminum were blended by a molar ratio of Al/Ni=3. The compacted powder blend was heated to ignite the reaction, which resulted in the Al_3Ni formation. The enthalpy control during the combustion reaction was carried out by adding a reaction enhancer ( [Ti+B_4C] blended powder ) to increase the heat of reaction. Blending a sufficient amount of the reaction enhancer successfully made the Al_3Ni composite foam with more than 80vol% porosity. The effects of preheating, density of the green compact, addition of reaction enhancer were also investigated and will be discussed in the presentation.
