The invention relates to a method for preparing
micrometer porous metal copper blocks by dealloying of
copper-ferrum
alloy. According to the method,
plasma is adopted to activate and sinter
copper-ferrum
alloy, and then ferrum in the
alloy is selectively corroded by utilizing a chemical dealloying method, thus obtaining porous copper blocks with high-strength
micrometer apertures. According to the invention, by utilizing the characteristic that the copper-ferrum inter-atom diffusing capacity can be greatly reduced by a quick
sintering process of hard
miscibility of copper-ferrum alloy, which is lower than the
melting point of ferrum, the dimension of a
ferrous phase after
sintering approaches to the particle size of micron-size material
powder, so as to prepare the copper-ferrum bi-continuous three-dimensional net structured copper-ferrum alloy; the particle size of adopted copper
powder is slightly smaller than that of
ferrous powder, so as to form a structure that copper particles wrap
ferrous particles, thus being favorable for ensuring the uniformity of aperture after
corrosion; the pore structures of the
porous metal copper blocks are regulated and controlled by changing the ferrous powder content and the
particle size distribution; according to the process, the high-strength
micrometer porous copper blocks with uniform
pore distribution and adjustable pore size and
porosity can be obtained; and the method has the advantages of being simple in process, low in cost and strong in practicability.