Phase change thermal interface metal composite material and its preparation method

The present invention relates to a composite thermal interface material of the metal phase change and a preparation method. The phase change thermal interface metallic composite material comprising a porous intermediate metal layer, are disposed on the opposite porous metal layer of the two sides of the microporous layer, and a metal filled in the porous metal layer and two intermediate layers microporous metal the phase change metal. An intermediate porous metal layer as structural support layer can withstand a certain pressure to keep the metal molten phase change is not pressed overflow and allows vertically through phase change metal, such that the phase change thermal interface metal composite material having a low thermal resistance and high thermal conductivity; two porous metal layer can be effectively suppressed phase change metal overflow, when the phase change metal melts and expands, bleeding can effectively fill the pores of the composite material from the metal layer is a microporous the gap, the process of using the hole does not appear.