アルミ箔を用いた積層クラッド法によるFe-Al系金属間化合物の作製

抄録

  A manufacturing process of Fe-Al intermetallic compounds was developed using a lamination cladding method with a pure Fe foil and a commercial Al foil. Fe foil with a size of 20 mm×10 mm×0.05 was wrapped in Al foil 9 times, followed by a heat treatment at temperature ranging from 913 K to 943 K. It was revealed that the reaction between Fe and Al occurred at temperatures more than 933 K, namely the melting point of Al, and a single FeAl₂ phase was uniformly formed. The specimens wrapped in Al foil 5 times and 3 times were prepared to obtain the specimens consisting of FeAl and Fe₃Al phases, respectively. However, the specimens heated at 933 K were composed of FeAl₂ and still retained Fe. The specimens heated at 933 K were subsequently heated at 1273 K. The FeAl and Fe₃Al phases were uniformly developed in the specimens wrapped in the Al foil 5 times and 3 times, respectively, revealing that the reheating at 1273 K was effective for the decomposition of the FeAl₂ phase.