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Alloying method for obtaining amorphous-layer or crystalline-state and amorphous composite layer on crystalline-state alloy surface by adopting pulsed arcs

A pulsed arc, composite layer technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of low oxygen evolution catalytic activity, overpotential and high Tafel slope

Inactive Publication Date: 2016-08-31
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the problems of overpotential and high Tafel slope in the working process of the crystalline alloy electrode, the catalytic activity of the anode for oxygen evolution is often low.

Method used

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  • Alloying method for obtaining amorphous-layer or crystalline-state and amorphous composite layer on crystalline-state alloy surface by adopting pulsed arcs
  • Alloying method for obtaining amorphous-layer or crystalline-state and amorphous composite layer on crystalline-state alloy surface by adopting pulsed arcs
  • Alloying method for obtaining amorphous-layer or crystalline-state and amorphous composite layer on crystalline-state alloy surface by adopting pulsed arcs

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Example 1, a crystalline and amorphous composite layer is prepared on the surface of a crystalline alloy substrate.

[0052] Step 1: Ingredients;

[0053] According to the target composition [(Fe 0.5 co 0.5 ) 0.75 B 0.2 Si 0.05 ] 96 Nb 4 Weigh Fe, Co, Si and Nb metal elements and FeB pre-alloy, and mix them uniformly to obtain smelting raw materials;

[0054] In the present invention, the mass percentage purity of each element of Zr, Al, Ni and Cu is not lower than 99.0%. The mass fraction of B in the FeB prealloy is 20.8%.

[0055] Step 2: melting the crystalline alloy;

[0056] Smelting the smelting raw material in step 1 in an electric arc smelting equipment for 5 times, and taking out the alloy after cooling with the furnace, to prepare a crystalline alloy ingot;

[0057] Melting vacuum degree is 8×10 -3 Pa;

[0058] The protective atmosphere for smelting is high-purity argon with a purity of 99.999%;

[0059] Melting temperature 2000℃;

[0060] Step 3: ...

Embodiment 2

[0076] Embodiment 2, making an amorphous alloy layer on the surface of the crystalline alloy.

[0077] Step 1: Ingredients;

[0078] According to the target component Zr 55 al 10 Ni 5 Cu 30 Crystalline alloys weigh Zr, Al, Ni and Cu metal elements, and mix them uniformly to obtain smelting raw materials;

[0079] In the present invention, the mass percentage purity of each element of Zr, Al, Ni and Cu is not lower than 99.0%.

[0080] Step 2: melting the crystalline alloy;

[0081] Melting the smelting raw material in step 1 in an electric arc smelting equipment for 4 times, and taking out the alloy after cooling with the furnace, to prepare a crystalline alloy ingot;

[0082] Melting vacuum is 1×10 -2 Pa;

[0083] The protective atmosphere for smelting is high-purity argon with a purity of 99.999%;

[0084] Melting temperature 1800℃;

[0085] Step 3: surface treatment of crystalline alloy by pulsed arc;

[0086] Cut the crystalline alloy ingot into 1×1×1 cm samples...

Embodiment 3

[0100] Embodiment 3, making a composite layer of crystalline and amorphous alloy on the surface of crystalline alloy.

[0101] Step 1: Ingredients;

[0102] According to the target composition Ti 45.5 Zr 6.5 Cu 39.9 Ni 5.1 sn 2 Si 1 Crystalline alloys weigh Ti, Zr, Cu, Ni, Sn and Si metal elements, and mix them uniformly to obtain smelting raw materials;

[0103] In the present invention, the mass percentage purity of each element of Ti, Zr, Cu, Ni, Sn and Si is not less than 99.0%.

[0104] Step 2: melting the crystalline alloy;

[0105] Melting the smelting raw material in step 1 in an electric arc smelting equipment for 4 times, and taking out the alloy after cooling with the furnace, to prepare a crystalline alloy ingot;

[0106] Melting vacuum is 1×10 -2 Pa;

[0107] The protective atmosphere for smelting is high-purity argon with a purity of 99.999%;

[0108] Melting temperature 2000℃;

[0109] Step 3: surface treatment of crystalline alloy by pulsed arc;

[0...

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Abstract

The invention discloses an alloying method for obtaining an amorphous-layer or a crystalline-state and amorphous composite layer on a crystalline-state alloy surface by adopting pulsed arcs. A crystalline-state alloy matrix surface is instantaneously molten by applying pulsed arcs, and rapid solidification is realized under cooling of a cooling medium and a crystalline-state alloy matrix, so that the amorphous-layer or the crystalline-state and amorphous composite layer is obtained on the crystalline-state alloy surface. Compared with a conventional crystalline-state alloy, a crystalline-state alloy with the amorphous-layer or the crystalline-state and amorphous composite layer is prepared into an anode oxygen evolution electrode for electrolyzed water, so that oxygen evolution catalytic activity is better.

Description

technical field [0001] The invention belongs to the technical field of metal processing, and specifically discloses an alloy method for obtaining an amorphous layer or a composite layer of a crystal state and an amorphous state on the surface of a crystalline state alloy substrate by pulse electric arc treatment. Background technique [0002] Arc is a gas discharge phenomenon, the instantaneous spark generated by the current passing through some insulating medium (such as air). The arc is a self-sustaining gas that conducts electricity, and most of its carriers are electrons generated by an electron emission. According to the type of current, the arc can be divided into three types: DC arc, AC arc and pulse arc. Among them, the pulsed arc is an arc that supplies current in a pulsed manner. [0003] Crystalline alloy is a general term for a class of metal alloys whose atomic arrangement has three-dimensional periodic structure characteristics. Generally, the alloy material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/00C22F1/18C25B11/04C25B1/04
CPCC22F1/00C22F1/08C22F1/10C22F1/186C25B1/04C25B11/051Y02E60/36
Inventor 张涛左磊
Owner BEIHANG UNIV
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