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Cu-Ni-Al alloy powder and preparation method thereof

A cu-ni-al, alloy powder technology, which is applied in the field of raw materials and preparation of anode materials for molten carbonate fuel cells, can solve the problem that the performance of sintered products cannot meet the performance requirements of anode materials, the sintering is difficult to control, and the sample expands. problem, to achieve the effect of small segregation, good crystallinity and high powder forming rate

Active Publication Date: 2012-06-13
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, porous Cu alloys prepared from existing Cu alloy powders still have obvious deficiencies in corrosion resistance and sintering resistance. For example, when Cu, Ni, and Al mixed powders are sintered, Al will cause the sintering process. Swelling occurs in the sample, especially when the Al content is high (wt.% ≥ 5%), the high-melting-point alumina film covered on the surface of the Al powder will prevent the metal atoms in the sintered powder from contacting, making the sintering difficult to control, and the sintered product The performance is difficult to meet the performance requirements for anode materials in MCFC

Method used

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  • Cu-Ni-Al alloy powder and preparation method thereof
  • Cu-Ni-Al alloy powder and preparation method thereof
  • Cu-Ni-Al alloy powder and preparation method thereof

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Experimental program
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Embodiment 1

[0024] A kind of Cu-Ni-Al alloy powder of the present invention, this alloy powder is made of metallic Cu phase and AlNi interphase, the average particle diameter of alloy powder is 40 μm~50 μm, alloy powder has no macroscopic segregation, and the oxygen content of alloy powder is 0.0112%, the mass fractions of Cu, Ni and Al in the alloy powder are: Cu 60% 、 Ni 25% and Al 15% (negligible impurities).

[0025] The Cu-Ni-Al alloy powder of this embodiment is mainly prepared through the following steps:

[0026] (1) Alloy smelting: Put 6.0Kg of electrolytic Cu block with a purity of 99.99% and 2.5Kg of electrolytic Ni block with a purity of 99.96% in an intermediate frequency induction furnace (the process parameters of the intermediate frequency induction furnace are controlled as follows: current 20A, frequency 20Hz) graphite crucible, after Cu and Ni are melted, add 1.5Kg of electrolytic Al with a purity of 99.95% for melting;

[0027] (2) Refining of the alloy: When the tem...

Embodiment 2

[0030] a kind of like figure 1 Shown Cu-Ni-Al alloy powder of the present invention, the X-ray diffraction pattern of alloy powder is as figure 2 As shown, the alloy powder is composed of metal Cu phase and AlNi intermediate phase, the average particle size of the alloy powder is 40 μm to 50 μm, the alloy powder has no macro-segregation, the oxygen content of the alloy powder is 0.0105%, and the Cu, Ni and The mass fractions of Al are: Cu 55%、 Ni 35% and Al 10% (negligible impurities).

[0031] The Cu-Ni-Al alloy powder of this embodiment is mainly prepared through the following steps:

[0032] (1) Alloy smelting: Put 5.5Kg of electrolytic Cu block with a purity of 99.99% and 3.5Kg of electrolytic Ni block with a purity of 99.96% in an intermediate frequency induction furnace (the process parameters of the intermediate frequency induction furnace are controlled as follows: current 20A, frequency: 30Hz) graphite crucible, after Cu and Ni are melted, add 1.0Kg of electrolytic...

Embodiment 3

[0037] A kind of Cu-Ni-Al alloy powder of the present invention, this alloy powder is made of metallic Cu phase and AlNi interphase, the average particle diameter of alloy powder is 40 μm~50 μm, alloy powder has no macroscopic segregation, and the oxygen content of alloy powder is 0.013%, the mass fractions of Cu, Ni and Al in the alloy powder are: Cu 50% 、 Ni 35% and Al 15% (negligible impurities).

[0038] The Cu-Ni-Al alloy powder of this embodiment is mainly prepared through the following steps:

[0039] (1) Alloy smelting: Put 5.0Kg of electrolytic Cu block with a purity of 99.99% and 3.5Kg of electrolytic Ni block with a purity of 99.96% in an intermediate frequency induction furnace (the process parameters of the intermediate frequency induction furnace are controlled as follows: current 20A, frequency 40Hz ) in a graphite crucible, and after Cu and Ni are melted, add 1.5Kg of electrolytic aluminum ingot with a purity of 99.95% for melting;

[0040] (2) Refining of th...

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Abstract

The invention discloses Cu-Ni-Al alloy powder, which is composed of metal Cu phases and AlNi intermediate phases, is free from macroscopic segregation and low in oxygen content and comprises the following components in mass fraction respectively: 25-35% of Ni, 10-15% of Al and the balance of Cu. The preparation method of the alloy powder comprises the steps of: firstly, proportioning metal Cu, metal Ni and metal Al, then heating the Cu and Ni, and adding Al for smelting after the Cu and Ni are molten; adding wood charcoal after the temperature of molten alloy reaches 1450-1550 DEG C, then adding a refining and slagclearing agent, and stirring, deslagging and refining the molten alloy; and finally, pouring the refined molten alloy into a crucible of an atomizing and rapid condensing device, and atomizing by using the atomizing and rapid condensing device for producing powder to prepare the Cu-Ni-Al alloy powder. The alloy powder disclosed by the invention has the advantages of high alloy element content, good powder purity, uniform chemical components, slight segregation, good crystallinity and the like.

Description

Technical field [0001] The present invention involves the raw material and preparation of a melting carbonate fuel cell anode material, and especially involves a alloy powder and its preparation methods. Background technique [0002] Molten Carbonate Fuel Cell (MCFC) is a high -temperature fuel cell that uses melting alkaline metal carbonate mixture as electrolyte, running at high temperature at 600 ° C to 700 ° C, without precious metals as catalysts;Geng gas (h 2 , CO or hydrocarbons) for fuel, fuel gas can achieve internal reorganization; emitted NO x Less than 10 ppm, emission SO x Both particles can be ignored; the charge efficiency can reach 55%and the comprehensive efficiency can reach 80%.MCFC not only has the characteristics of high efficiency, pollution -free, noise, non -noise, continuous work, small and medium -sized decentralized economy, convenient load changes, etc., but also has higher efficiency, lower cost, low cost, and lower cost, lower cost, low cost, and low...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/08
Inventor 陈荐李微陈鼎陈建林任延杰何建军邱玮
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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