Manufacture of Raney Ni catalyst with metastable Ni_2Al_3 by high - energy milling

摘要

The Ni-Al alloy containing Cr, Fe additives were prepared as Raney Ni catalyst by high energy milling. The size and surface state of Ni-Al alloy powder were studied by particle size analyzer and scanning electron microscopy, the structure was analyzed by XRD and Mossbauer methods. The results showed that af - ter a high - energy milling (HEM), the Ni-Al alloy transforms to a nano - scale NiAl structure with rich A. By annealing the alloy, a metastable Ni_2Al_3 phase can be obtained.