Method for producing magnesium-based hydrogen-storing alloy and composite material by laser sintering
A magnesium-based hydrogen storage alloy and composite material technology, which is applied in the field of laser sintering to prepare magnesium-based hydrogen storage alloy and its composite materials, to achieve the effects of improving hydrogen storage and electrochemical performance, optimizing structure, and reducing burning loss
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Embodiment 1
[0019] Example 1: Metal Mg powder with a purity of 99.7% and a particle size of 200 mesh; Ni powder with a purity of 99.7% and a particle size of 200 mesh. A certain weight molar ratio is 1: 1 Mg powder (adding 5% burning loss for Mg powder) and Ni powder are put into stainless steel tank; The ratio of ball to material is 10:1); the evenly mixed powder is pressed in a stainless steel abrasive tool at 30MPa for 30 seconds and then pressed into a Φ13×3mm biscuit; the biscuit is placed in a graphite boat in the sintering chamber, and the 2 Laser for sintering. Among them, the laser power is 1000W, the scanning speed is 120mm / min, the spot diameter is 3mm, and the three-pass scanning is formed. The sintering time is about 8s. During the sintering process, it is cooled by circulating water; after laser sintering, it can quickly prepare high-purity Mg-Ni Elemental alloys, where Mg 2 Ni and MgNi 2 The content reaches more than 95wt.%.
Embodiment 2
[0020] Embodiment 2: metal Mg powder, purity 99.7%, particle size 200 orders; LaNi of smelting 5 The alloy was ground into a 300-mesh alloy powder in a glove box. Mg powder with a weight ratio of 4:1 (add 5% more burning loss to Mg powder) and LaNi 5The alloy powder is put into a stainless steel tank; the stainless steel tank is placed in a planetary ball mill for argon protection ball milling and mixed for 2 hours (the ratio of ball to material is 10:1); the evenly mixed powder is pressed in a stainless steel grinding tool at 30MPa for 30 seconds. into Φ13×3mm biscuit; put the biscuit into the graphite burning boat in the sintering chamber, and use CO 2 Laser for sintering. Among them, the laser power is 800W, the scanning speed is 120mm / min, the spot diameter is 5mm, and the three-pass scanning is formed. The sintering time is about 6s. During the sintering process, it is cooled by circulating water; after laser sintering, it can quickly prepare high-purity La-Mg- Ni comp...
Embodiment 3
[0021] Embodiment 3: electromagnetic smelting or direct purchase of Mg 2 Ni and LaNi 5 The alloy was ground into a 100-mesh alloy powder in a glove box. LaNi with a weight ratio of 9:1 to 7:3 5 and Mg 2 Put the Ni alloy powder into a stainless steel tank; put the stainless steel tank in a planetary ball mill for argon protection ball milling and mix for 2 hours (the ratio of ball to material is 10:1); after the uniformly mixed powder is kept in a stainless steel grinding tool at 20MPa for 30 seconds, Pressed into Φ13×3mm biscuit; put the biscuit into the graphite burning boat in the sintering chamber, and use CO 2 Laser for sintering. Among them, the laser power is 500W, the scanning speed is 120mm / min, the spot diameter is 3mm, three-way scanning molding, the sintering time is 10s, and the sintering process is cooled by circulating water; after laser sintering, it can quickly prepare high-purity La-Mg-Ni Ternary alloy composite materials, in which the composite materials...
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