Microstructure and catalytic properties of rapidly quenched Ni-Al-Cr-Fe alloy

A Ni-Al-Cr-Fe alloy was prepared by the rapid-quenching method using a sing le copper roll and its microstructure and surface state were studied and co mpared with the parent alloy by using XRD, SEM, EMPA and BET methods. The c atalytic properties of both alloys used for the hydrogenation of adiponitri le were evaluated. The results show that the rapidly quenched Ni-Al-Cr-Fe a lloy exhibited fine and homogeneous structure and contained more NiAl3 phas e; distributions of promoter Cr and Fe were highly homogeneous. After activ ation, the rapidly quenched Ni-Al-Cr-Fe possessed smaller pore volume and p ore size, compared with the parent alloy. Catalytic properties of the rapid ly quenched Ni-Al-Cr-Fe alloy were superior to those of the parent alloy in hydrogenation of adiponitrile. (C) 2001 Elsevier Science B.V. All rights r eserved.