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Re metal wire prepared by NiAl-Re eutectic and preparation method of the Re metal wire

A technology of metal wires and eutectic alloys, applied in the field of preparation of Re metal nanowires, can solve problems such as the harm of nanostructured materials

Inactive Publication Date: 2012-11-21
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main disadvantage of the template electrodeposition method is the presence of impurities due to edge reactions; another disadvantage is the obvious hazard of nanostructured materials during the template removal process

Method used

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  • Re metal wire prepared by NiAl-Re eutectic and preparation method of the Re metal wire
  • Re metal wire prepared by NiAl-Re eutectic and preparation method of the Re metal wire
  • Re metal wire prepared by NiAl-Re eutectic and preparation method of the Re metal wire

Examples

Experimental program
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example 1

[0019] In this example, Re nanowires are prepared by NiAl-1.5at.% Re eutectic directional solidification.

[0020] In this embodiment, high-purity Ni (99.99%), Al (99.99%) and Re particles (99.99%) are used to form an alloy, wherein the atomic percentage of Ni: Al is 1: 1, and Re is in the NiAl-Re eutectic alloy The atomic percentage in is 0.015.

[0021] This embodiment also proposes a method for preparing Re metal wire, comprising the following steps:

[0022] Step 1, preparing NiAl-Re eutectic alloy ingot: mix high-purity Ni, Al and Re particles in proportion; put the prepared raw materials into a copper crucible and put it in a high vacuum arc melting furnace, and put the melting furnace Vacuum down to below 2×10 -4 Pa and keep. The raw materials are heated and smelted into solution in the furnace. The solution was cooled with the furnace for 3 hours, and a NiAl-Re eutectic alloy ingot was obtained after cooling.

[0023] Step 2, directional solidification of the eute...

example 2

[0027] In this example, Re nanowires are prepared by NiAl-1.5at.% Re eutectic directional solidification.

[0028] In this embodiment, high-purity Ni (99.99%), Al (99.99%) and Re particles (99.99%) are used to form an alloy, wherein the atomic percentage of Ni: Al is 1: 1, and Re is in the NiAl-Re eutectic alloy The atomic percentage in is 0.015.

[0029] This embodiment also proposes a method for preparing Re metal wire, comprising the following steps:

[0030] Step 1, preparing NiAl-Re eutectic alloy ingot: mix high-purity Ni, Al and Re particles in proportion; put the prepared raw materials into a copper crucible and put it in a high vacuum arc melting furnace, and put the melting furnace Vacuum down to below 2×10 -4 Pa and keep. The raw materials are heated and smelted into solution in the furnace. The solution was cooled with the furnace for 3 hours, and a NiAl-Re eutectic alloy ingot was obtained after cooling.

[0031]Step 2, directional solidification of the eutec...

example 3

[0035] In this example, Re nanowires are prepared by NiAl-2at.% Re eutectic directional solidification.

[0036] In this embodiment, high-purity Ni (99.99%), Al (99.99%) and Re particles (99.99%) are used to form an alloy, wherein the atomic percentage of Ni: Al is 1: 1, and Re is in the NiAl-Re eutectic alloy The atomic percentage in is 0.02.

[0037] This embodiment also proposes a method for preparing Re metal wire, comprising the following steps:

[0038] Step 1, preparing NiAl-Re eutectic alloy ingot: mix high-purity Ni, Al and Re particles in proportion; put the prepared raw materials into a copper crucible and put it in a high vacuum arc melting furnace, and put the melting furnace Vacuum down to below 2×10 -4 Pa and keep. The raw materials are heated and smelted into solution in the furnace. The solution was cooled with the furnace for 3 hours, and a NiAl-Re eutectic alloy ingot was obtained after cooling.

[0039] Step 2, directional solidification of the eutecti...

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Abstract

The invention discloses an Re metal wire prepared by NiAl-Re eutectic and a preparation method of the Re metal wire. The NiAl-Re eutectic alloy is prepared by high-purity Ni, Al and Re particles. In the invention, a prepared NiAl-Re eutectic alloy cast ingot is directionally solidified; corrosion solution is prepared by 6.4%HCl and 6%H2O2 in volume ratio of 1:1; a sample obtained after directional solidification is selectively corroded, so that NiAl matrix is dissolved while the fiber phase is kept the same; the corroded sample is soaked in distilled water for 10min; and then the corroded sample is taken out and aired to obtain the Re fiber. By the selective corrosion technology, a metal nanometer wire of high aspect ratios is obtained and the obtained metal wire has high purity. During preparation, by effective adjustment on heat flux, the size and the shape of the nanometer wire material are effectively controlled and the ultra-fining of the fiber eutectic phase is realized.

Description

technical field [0001] The invention relates to a preparation method of Re metal nanowires. Background technique [0002] Nanowires have the characteristics of chemical sensitivity, field emission efficiency, and super memory function, and can be used to prepare microsensors, field emission electrodes, magnetic memory system materials, and so on. The traditional method of making nanostructured fibers is to use flat sheet technology, but the properties of the fibers obtained through this process are not very good. At present, the fabrication of metal nanowires is mainly through template-directed synthesis, including chemical deposition or electrochemical deposition of metals. For example: Ni nanowire arrays with a diameter of 30nm can be obtained by electrodeposition on aluminum oxide films. The document "W.Kautek, S.Reetz, S.Pentzien.Template electrodeposition of nanowire arrays on gold foils fabricated bypulsed-laser deposition [J]. Electrochim. Acta, 1995, 40: 1461." dis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/62C30B29/02C30B21/02C30B33/10
Inventor 刘林胡勤赵志龙赵新宝张军傅恒志
Owner NORTHWESTERN POLYTECHNICAL UNIV