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Refractory high-entropy amorphous alloy material, and preparation method and application thereof

An amorphous alloy and refractory technology, which is applied in the field of refractory high-entropy amorphous alloy material and its preparation, can solve the problems of poor ductility at room temperature, difficult amorphous alloy, poor high-temperature oxidation resistance and the like, and the method is simple. , the effect of increasing the atomic radius difference and improving the ability to form amorphous

Active Publication Date: 2022-02-18
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Refractory high-entropy alloys, which are expected to be substitutes for nickel-based superalloys, have excellent properties at high temperatures, but refractory high-entropy alloys have the disadvantages of poor high-temperature oxidation resistance, poor ductility at room temperature, and high density, making them a breakthrough in nickel-based high-entropy alloys. Difficulties in developing alternatives to base superalloys
[0006] Therefore, the development of a material with excellent properties of high-entropy alloys, refractory alloys and amorphous alloys is critical to its preparation method and application. The large size difference between them is easy to cause lattice distortion, and it is not easy to form amorphous alloys, so that it is more difficult to prepare refractory high-entropy amorphous alloys

Method used

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  • Refractory high-entropy amorphous alloy material, and preparation method and application thereof
  • Refractory high-entropy amorphous alloy material, and preparation method and application thereof
  • Refractory high-entropy amorphous alloy material, and preparation method and application thereof

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Embodiment 1

[0050] f 20 Ni 20 Ta 20 co 20 Nb 20 Preparation and property testing of refractory high-entropy amorphous alloy materials.

[0051] According to the atomic fraction of the refractory high-entropy amorphous alloy material converted into mass percentage and weighed, select high-purity Hf particles, Ni particles, Ta blocks, Co blocks, Nb particles (purity not less than 99.9%) as raw materials, and polish the scale Afterwards, ultrasonic cleaning was performed twice for 10 min with alcohol. The mass of the smelted alloy ingot is 19.930g, and the mass of each element is w(Hf)=6.241g, w(Ni)=2.052g, w(Ta)=6.327g, w(Co)=2.061g, w(Nb)= 3.249g.

[0052] The master alloy ingot was prepared by arc melting method under vacuum and argon protective atmosphere, and the vacuum was repeatedly pumped and washed three times until the vacuum degree was 5×10 -3 Pa, pour high-purity argon gas with a purity of 99.999% until the pressure of the vacuum chamber is -0.05MPa, mix evenly and melt in...

Embodiment 2

[0062] f 19 Ni 19 Ta 19 co 19 Nb 19 Re 5 Preparation and property determination of refractory high-entropy amorphous alloy materials.

[0063] According to the atomic fraction of the refractory high-entropy amorphous alloy material converted into mass percentage and weighed, high-purity Hf particles, Ni particles, Ta blocks, Co blocks, Nb particles, Re particles (purity not less than 99.9%) are selected as raw materials, After polishing the scale, ultrasonically clean it twice with alcohol for 10 minutes. The mass of the smelted alloy ingot is 20g, and the mass of each element is w(Hf)=5.767g, w(Ni)=1.896g, w(Ta)=5.847g, w(Co)=1.904g, w(Nb)=3.002 g, w(Re) = 1.583g.

[0064] The master alloy ingot was prepared by arc melting method under vacuum and argon protective atmosphere, and the vacuum was repeatedly pumped and washed three times until the vacuum degree was 5×10 -3 Pa, pour high-purity argon gas with a purity of 99.999% until the pressure of the vacuum chamber is ...

Embodiment 3

[0073] f 19 Ni 19 Ta 19 co 19 Nb 19 B 5 Preparation and property determination of refractory high-entropy amorphous alloy materials.

[0074] According to the atomic fraction conversion of the refractory high-entropy amorphous alloy material into mass percentage and weighing, select high-purity Hf particles, Ni particles, Ta blocks, Co blocks, Nb particles, B particles (purity not less than 99.9%) as raw materials, After polishing the scale, ultrasonically clean it twice with alcohol for 10 minutes. The mass of the smelted alloy ingot is 20g, and the mass of each element is w(Hf)=6.232g, w(Ni)=2.049g, w(Ta)=6.318g, w(Co)=2.058, w(Nb)=3.244g , w(B)=0.099g.

[0075] The master alloy ingot was prepared by arc melting method under vacuum and argon protective atmosphere, and the vacuum was repeatedly pumped and washed three times until the vacuum degree was 5×10 -3 Pa, pour high-purity argon gas with a purity of 99.999% until the pressure of the vacuum chamber is -0.05MPa, ...

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Abstract

The invention discloses a refractory high-entropy amorphous alloy material which comprises more than three refractory metal elements including Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W and Re and one or two non-refractory metal elements including Al, Si, Co, B and Ni, and the refractory high-entropy amorphous alloy material is an amorphous structure. The refractory high-entropy amorphous alloy material has relatively high corrosion resistance and mechanical properties. The invention further discloses a preparation method of the refractory high-entropy amorphous alloy material. The preparation method comprises the following steps: burdening according to the atomic fraction of each element of the refractory high-entropy amorphous alloy material, and uniformly smelting to prepare a master alloy ingot; and melting the mother alloy ingot and then spraying to the surface of a rotating copper roller, and preparing the refractory high-entropy amorphous alloy strip. The method is simple and efficient, and can be applied to large-scale industrial production. The invention further discloses application of the refractory high-entropy amorphous alloy material to pipeline transportation in nuclear reactors, nuclear power and corrosive environments.

Description

technical field [0001] The invention belongs to the field of corrosion and material science, and in particular relates to a refractory high-entropy amorphous alloy material and its preparation method and application. Background technique [0002] Refractory metal alloys were originally composed of five refractory elements, Mo (molybdenum), Nb (niobium), Ta (tantalum), W (tungsten) and vanadium (V), and then expanded to include subgroup IV ( Ti, Zr, Hf), V subgroups (V, Nb, Ta), VI subgroups (Cr, Mo, W) and Re, 10 metal elements with a melting point higher than 1800°C and certain reserves, and non-refractory elements , such as Al, Si, Co and Ni composition. In 2004, Professor Ye Junwei proposed the concept of high-entropy alloys. Combining the concepts of refractory metals and high-entropy alloys, refractory high-entropy alloys were first reported in 2010. The definition of refractory high-entropy alloys is extended to contain 3 or more major elements and the atomic fractio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/00C22C45/10C22C1/02B22D11/06
CPCC22C45/00C22C45/10C22C1/02B22D11/0611B22D11/001C22C2200/02C22C1/11
Inventor 韩飞杨晓东霍军涛王军强
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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