Abstract：Ni-Al intermetallics have received widespread attention owing to its low density, good thermal conductivity,
excellent high temperature mechanical properties and high temperature oxidation resistance and so on. So, it
is expected that Ni-Al intermetallics can be used as high temperature structural material to replace traditional stainless
steel and nickel- base superalloy. Porous Ni-Al intermetallics traditional dense Ni-Al intermetallics with the
characteristics of functionality and lightweight. Therefore, porous Ni-Al intermetallics can be used as the filter materials
or catalyst in high temperature oxidation environment and acid-base corrosive condition. Based on the raw
materials and preparation processes, the prepration technology of porous Ni-Al intermetallics can be divided into
three classes: powder metallurgy method (including reaction and combustion synthesis methods), chemical dealloying
method and directional solidification method. In addition, the characteristics and pore construction methods of
various technologies are analyzed, and the future development trend is also expected. It is hoped that the combination
of various preparation technologies to expand their application fields and solve engineering need.
2021, Vol. 31 
