Porous metal material and preparation method thereof

[0012] Example 1 The polyurethane sponge material with a thickness of 2.0mm is used as the substrate, and the preparation is carried out according to the following process: conductive treatment of the substrate - the first electrochemical deposition - the first heat treatment - rolling - surface treatment - the second The second electrochemical deposition - the second heat treatment.

[0013] Among them, the conductive treatment adopts the physical vapor deposition method, using high-purity electrolytic nickel target as the sputtering substrate, in a vacuum of 1.8*10 -2 Pa, sputtering power 3.5Kw, target distance 40mm under the process conditions, adopt physical vapor deposition to deposit a nickel layer on the polyurethane sponge substrate, the nickel deposition amount is 0.3g / m 2 .

[0014] The first electrochemical deposition adopts ordinary Watts nickel electrodeposition process and equipment to deposit a nickel layer on the above-mentioned conductive substrate, and cont

[0021] Example 2 Porous nickel material is prepared in substantially the same manner as in Example 1, and its different process conditions are as follows: 1. The thickness of the original polyurethane sponge base material is 10mm; 2. The amount of electrochemically deposited nickel for the first time is 1000g / m 2 ; 3. The reduction temperature of the first heat treatment is 1100°C; 4. Rolling to a thickness of 9.5mm, soaking time in dilute nitric acid solution is 30min; 5. In the second electrochemical deposition step, the double anode area is different , the area ratio is 1:5, and the amount of nickel deposited on the side corresponding to the small anode is controlled to be 50g / m 2 ; 6. The second heat treatment is vacuum heat treatment, the temperature is 700°C, and the material is kept warm for 3 hours per square meter.

[0022] The porous nickel material prepared by the above method is measured, along the thickness direction of the material, from top to bottom (note: t

[0023] Example 3 Porous nickel material is prepared in substantially the same manner as in Example 1, and the different process conditions are as follows: 1. The thickness of the original polyurethane sponge base material is 1.6mm; 2. The amount of electrochemically deposited nickel for the first time is 500g / m 2 ; 3. The reduction temperature of the first heat treatment is 900°C; 4. Rolling to a thickness of 1.5mm, soaking time in dilute hydrochloric acid solution is 10min; 5. In the second electrochemical deposition step, the double anode area is different , the area ratio is 1:3, and the amount of nickel deposited on the side corresponding to the small anode is controlled to be 100g / m 2 ; 6. The second heat treatment is vacuum heat treatment, the temperature is 500°C, and the material is kept warm for 0.5 hours per square meter.

[0024] The porous nickel material prepared by the above method is measured, along the thickness direction of the material, from top to bottom