Preparation method of micro-nano double-scale composite porous material
A porous material, two-scale technology, applied in the field of porous metal materials, can solve the problems of long preparation period and complex driving process, and achieve the effect of overcoming extremely high brittleness, overcoming technical bottlenecks, and expanding specific surface area.
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Example Embodiment
[0020] Embodiment 1: The preparation method of the micro-nano bi-scale composite porous material includes the following steps:
[0021] (1) Put 400g of Mg and Zn mixture (metal Zn accounts for 70% of the mixture mass) into the melting crucible in the high-pressure induction furnace, cover the furnace lid tightly, lock the furnace body, and evacuate to a vacuum degree of 10 -2 Pa;
[0022] (2) Filling with 0.1MPa hydrogen, heating the metal mixture in the melting crucible, melting the mixture to 20°C above the melting point, and then holding it for 30min, so that the hydrogen can be fully dissolved in the alloy solution;
[0023] (3) Pour the metal melt into a crucible cooled by water at the bottom to obtain a directional arrangement of micron-level regular through-hole materials with a thickness of 90 mm and a porosity of 34% of the micron-level regular through-hole material;
[0024] (4) The porous material was dealloyed with 1 mol / L hydrochloric acid until there were no obv...
Example Embodiment
[0025] Embodiment 2: The preparation method of the micro-nano bi-scale composite porous material includes the following steps:
[0026] (1) Put 500g of Mg and Ag mixture (metal Ag accounts for 50% of the mass of the metal mixture) into the melting crucible in the high-pressure induction furnace, close the furnace cover, lock the furnace body, and evacuate until the vacuum degree is l0 -2 Pa;
[0027] (2) Filling with 0.5MPa hydrogen, heating the metal mixture in the melting crucible, melting the mixture to 30°C above the melting point, and then holding it for 20min, so that the hydrogen is completely dissolved in the alloy solution;
[0028] (3) Pour the metal melt into a water-cooled crucible at the bottom to obtain a directional arrangement of micron-sized regular through-hole materials; see the macroscopic morphology of the longitudinal section of the Mg-Ag porous alloy figure 1 , see the macroscopic topography of the cross-section figure 2 , and the partial enlargement ...
Example Embodiment
[0030] Embodiment 3: The preparation method of the micro-nano bi-scale composite porous material includes the following steps:
[0031] (1) Put 600g of Mg, Ag and Pd mixture (metal Ag accounts for 40% of the mass of the metal mixture) into the smelting crucible in the high-pressure induction furnace, close the furnace cover, lock the furnace body, and evacuate to a vacuum degree of l0 -2 Pa;
[0032] (2) Fill with 1.5MPa hydrogen, heat the metal mixture in the melting crucible, melt the mixture to 20°C above the melting point, and then keep it for 30min, so that the hydrogen can be fully dissolved in the alloy solution;
[0033] (3) Pour the metal melt into the bottom water-cooled crucible to obtain a directional arrangement of micron-level regular through-hole materials with a thickness of 110 mm, and the micron-level regular through-hole material has a porosity of 47%;
[0034] (4) The obtained porous material was corroded by the electrochemical corrosion method, the elect...
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