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A nanoscale powder mg 2 The preparation method of ni compound

A nano-scale powder and compound technology, which is applied in the field of preparation of nano-powder Mg2Ni compounds, can solve the problems of high preparation cost, complex preparation process, and long cycle, and achieve low cost, simple and reliable process, and improved hydrogen storage performance Effect

Active Publication Date: 2017-10-17
YANGZHOU UNIV
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Problems solved by technology

Mg 2 Ni powder materials are generally prepared by rapid melting and solidification method, that is, magnesium and nickel are smelted into alloy compound ingots first, and then powder materials are prepared by heating, melting and centrifugal separation, and then prepared by ball milling and mechanical alloying. The nano-scale powder hydrogen storage material produced has a complex and long-term preparation process, and requires atmosphere protection during the ball milling process, so the material preparation cost is relatively high

Method used

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  • A nanoscale powder mg <sub>2</sub> The preparation method of ni compound
  • A nanoscale powder mg <sub>2</sub> The preparation method of ni compound
  • A nanoscale powder mg <sub>2</sub> The preparation method of ni compound

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Embodiment Construction

[0022] One, the preparation steps are as follows:

[0023] 1. After the magnesium is melted, nickel is gradually added, and it is cast into an alloy ingot after stirring and refining.

[0024] The mass percentage of the chemical composition of the magnesium-nickel alloy targeted by this technology is: nickel 5.0-40.0%, and the rest is magnesium and unavoidable impurities.

[0025] The following table is the raw material ratio table of each example (unit: kg)

[0026]

[0027] 2. Each alloy ingot is homogenized below 500°C to eliminate component segregation.

[0028] 3. Each alloy ingot is subjected to equal-channel angular pressing (ECAP), which can be processed repeatedly for multiple passes. The deformation temperature of each pass is between 200°C and 250°C. The refinement effect of the processed microstructure at high temperature is better.

[0029] 4. The magnesium-nickel alloy processed by equal-channel angular extrusion is drawn into magnesium-nickel alloy wire or...

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Abstract

A kind of nanoscale powder Mg 2 The preparation method of Ni compound belongs to the field of material preparation technology, and the magnesium-nickel alloy is processed by the severe plastic deformation technology, so that the microstructure is fully refined, and the Mg 2 The size of the Ni phase is reduced to the nanoscale, and then the magnesium in the matrix is ​​corroded, and the corrosion product is filtered and dried to obtain nanoscale powder Mg with uniform particle size 2 Ni. The process of the present invention is simple and reliable, and the cost is low, and the obtained nano-scale powder Mg 2 Ni has a size comparable to that of the nodular method, and Mg 2 Ni crystals retain a large dislocation density and lattice distortion, which greatly improves its hydrogen storage performance.

Description

technical field [0001] The invention belongs to the technical field of material preparation, in particular to a nanoscale powder Mg 2 Preparation method of Ni compound. Background technique [0002] Hydrogen energy is a clean and efficient energy source, and it is also an important development direction of future energy sources. Among them, new high-performance hydrogen storage materials are the key to breakthroughs in hydrogen energy technology. Mg 2 Ni compound is a material with high hydrogen storage capacity and good hydrogen absorption and desorption kinetics. Mg 2 Ni powder materials are generally prepared by rapid melting and solidification method, that is, magnesium and nickel are smelted into alloy compound ingots first, and then powder materials are prepared by heating, melting and centrifugal separation, and then prepared by ball milling and mechanical alloying. The nano-scale powder hydrogen storage material produced has a complex and long-term preparation pr...

Claims

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Application Information

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IPC IPC(8): C22C19/03C22C3/00C22C23/00C22F1/06C23F1/22B22F1/00B22F9/16
CPCB22F1/0003B22F9/16C22C3/005C22C19/03C22C23/00C22F1/06C23F1/22
Inventor 严凯程宏辉金朝阳黄新费洪旗
Owner YANGZHOU UNIV
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