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Iridium amorphous alloy wire and preparation method thereof

A technology of amorphous alloys and alloy wires, applied in the fields of condensed matter physics and material science, can solve problems such as crystallization of iridium-containing amorphous materials, and achieve the effects of easy molding, reduced energy consumption, and good forming ability of iridium amorphous alloys

Inactive Publication Date: 2019-04-16
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While the T of the existing iridium-containing amorphous material g Close to 900°C, the temperature control at such a high temperature needs to be faster and more precise, otherwise it will easily lead to the crystallization of iridium-containing amorphous materials, which may be one of the reasons why no iridium amorphous alloy wire has been reported so far

Method used

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  • Iridium amorphous alloy wire and preparation method thereof
  • Iridium amorphous alloy wire and preparation method thereof
  • Iridium amorphous alloy wire and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Embodiment 1, the preparation of master alloy ingot

[0065] After the Ir, Ni, Ta, and B components with a purity of 99.5wt% (weight percent) are prepared in a molar ratio of 35:20:40:5, in an electric arc furnace protected by an argon atmosphere that absorbs titanium, First put tantalum (Ta) and boron (B) with close melting points into the electric arc furnace for smelting. This is because boron is a non-metal, and the arc cannot directly heat it, so the boron is wrapped with high melting point tantalum. After the tantalum is melted, the boron is melted by the temperature of the tantalum to make a tantalum-boron master alloy ingot; then, the tantalum-boron master alloy ingot and the remaining Ir and Ni raw materials are treated in an electric arc furnace protected by an argon atmosphere adsorbed by titanium. Repeated smelting to mix it evenly, each smelting only needs to melt all the components; finally, after cooling, Ir 35 Ta 40 Ni 20 B 5 Master alloy ingot.

Embodiment 2-14

[0066] Embodiment 2-14, preparation of master alloy ingots of various compositions

[0067] Master alloy ingots with various compositions were prepared according to the method of Example 1, and the composition and thermophysical parameters of the obtained amorphous alloy material were measured, and listed in Table 1 below.

[0068] Table 1

[0069]

Embodiment 15

[0070] Embodiment 15, free load traction method prepares Ir 35 Ta 40 Ni 20 B 5 Iridium amorphous alloy wire

[0071] Using conventional metal mold casting method, the Ir prepared in Example 1 35 Ta 40 Ni 20 B 5 The master alloy ingot is re-melted, and the melt of the master alloy is sucked into the water-cooled copper mold by using the suction casting device in the electric arc furnace. The inner diameter of the water-cooled copper mold is composed of a 2mm part with a length of 1cm and a 1mm part with a length of 4cm , the final composition can be obtained as Ir 35 Ta 40 Ni 20 B 5 An iridium amorphous alloy rod with a head diameter of 2 mm and a length of 1 cm and a tail diameter of 1 mm and a length of 4 cm. Wherein, there is a section of diameter at the head of the bar that is 2mm in order to place the iridium amorphous alloy bar on the figure 1 When placed in the central hole of the graphite cylinder (length 2cm, center diameter 1.5mm) shown, it will not fall o...

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Abstract

The invention provides an iridium amorphous alloy wire. The iridium amorphous alloy wire is alloy wires prepared by iridium amorphous alloy materials and with section diameters from several microns tohundreds microns: Ira-[Tax(Nb)1-x]b-[Niy(Co)z(Fe)r(Cu)m(V)n(W)k]c-Bd, wherein a, b, c and d are all atomic percentages, a is not smaller than 20 and not bigger than 40, B is not smaller than 30 and not bigger than 40, c is not smaller than 20 and not bigger than 35, d is not smaller than 0 and not bigger than 15, a+b+c+d=100; x, y, z, r, m, n and k are atomic percentages, and are not smaller than0 and not bigger than 1, and y+z+r+m+n+k is not bigger than 1; and amorphous phases in the amorphous alloy materials are not lower than 75%. The invention further provides a preparation method of theiridium amorphous alloy materials. Through component adjustment of the iridium amorphous alloy materials, wider supercooling liquid phase areas with excellent iridium amorphous alloy forming capacityare obtained, the sizes of the iridium amorphous alloys are increased, and high-temperature crystallization is prevented, so that micron-scale or nanoscale filiform iridium amorphous alloys never manufactured by the prior art can be prepared.

Description

technical field [0001] The invention belongs to the field of condensed matter physics and material science. Background technique [0002] Iridium alloy wire has unique high-temperature oxidation resistance, good thermal stability and high hardness, making it widely used in spark plug electrodes, incandescent filaments, high-temperature oxidation-resistant thermocouples, sensors, etc. In addition, the radioactive isotope iridium-192 wire is used as a gamma radiation source to treat cancer in medicine. [0003] However, the melting point of metal iridium is about 2410°C and it is extremely brittle at room temperature, so the preparation of iridium alloy wire usually needs to be formed at temperatures as high as 1800°C. Under such a high operating temperature, the high temperature resistance requirements of the mold, the energy consumption to achieve high temperature conditions, and the oxidation of alloy wires are extremely prominent. To make matters worse, when the temperat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/00C22C45/10C22C1/03
CPCC22C1/03C22C45/00C22C45/003C22C45/10C22C1/11
Inventor 李明星闻平汪卫华柳延辉
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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