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A high-entropy intermetallic compound with high strength and wide temperature range wear resistance

An intermetallic compound, wide temperature range technology, applied in the field of high-strength wear-resistant alloy materials, can solve the problems of room temperature yield strength difficult to break 1.5GPa, brittle intermetallic phase precipitation in large quantities, wear resistance difficult to maintain and other problems, to achieve good High temperature softening resistance, enlarged lattice distortion effect, high performance reliability effect

Active Publication Date: 2022-02-18
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, excessive alloying elements often lead to a large amount of precipitation of brittle intermetallic phases, which significantly deteriorates the properties of the matrix (Nat Commun. 2018;9:4063)
In terms of improving the wide temperature range wear resistance of Ni-Al intermetallic compounds, this purpose is mainly achieved by introducing solid lubricants and hard reinforcement phases, but the solid lubricant phase, anti-wear phase and alloy matrix Interface mismatch and metallurgical immiscibility can easily cause a sudden drop in mechanical properties of materials after composites (Tribol.Int. 2021;157:106912)
In general, the improvement of the mechanical and tribological properties of Ni-Al intermetallic compounds and their composites has almost reached the upper limit. It is difficult to maintain the wear resistance under 10 -5 mm 3 Below the order of / Nm

Method used

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  • A high-entropy intermetallic compound with high strength and wide temperature range wear resistance
  • A high-entropy intermetallic compound with high strength and wide temperature range wear resistance
  • A high-entropy intermetallic compound with high strength and wide temperature range wear resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1 Preparation of Ni 0.75 (Al 1 / 4 Nb 1 / 4 Ti 1 / 4 V 1 / 4 ) 0.25 High entropy intermetallic compounds:

[0037] According to the ratio shown in Table 1, use an electronic balance to weigh the original metal powder and put it into a cemented carbide tank, and perform a mechanical alloying process through a high-energy ball mill, as follows:

[0038] (1) Mixing: Put Ni powder, Al powder, Ti powder, Nb powder and V powder into the cemented carbide tank equipped with the high-energy ball mill, use cemented carbide balls with a diameter of 3-10 mm as the grinding balls, and place them in the argon In an air atmosphere, the mixture was mixed for 8 h under the conditions of a ball-to-material ratio of 2:1 and a rotational speed of 150 r / min to obtain uniformly mixed initial element powders;

[0039] (2) Alloying: put the uniformly mixed initial element powder into a high-energy ball mill, use cemented carbide balls with a diameter of 3-10 mm as the grinding balls, and...

Embodiment 2

[0049] Example 2 Preparation of Ni 0.5 (Al 1 / 4 Nb 1 / 4 Ti 1 / 4 V 1 / 4 ) 0.5 High entropy intermetallic compounds:

[0050] According to the ratio shown in Table 2, use an electronic balance to weigh the original metal powder and put it into a cemented carbide tank, and carry out the mechanical alloying process through a high-energy ball mill, as follows:

[0051] (1) Mixing: Put Ni powder, Al powder, Ti powder, Nb powder and V powder into the cemented carbide tank equipped with the high-energy ball mill, use cemented carbide balls with a diameter of 3-10 mm as the grinding balls, and place them in the argon In an air atmosphere, mix for 10 hours under the conditions of a ball-to-material ratio of 1.5:1 and a rotational speed of 150r / min to obtain uniformly mixed initial element powders;

[0052] (2) Alloying: put the uniformly mixed initial element powder into a high-energy ball mill, use cemented carbide balls with a diameter of 3-10 mm as the grinding balls, and use absol...

Embodiment 3

[0061] Example 3 Preparation of Ni 0.7 (Al 1 / 4 Nb 1 / 4 Ti 1 / 4 V 1 / 4 ) 0.3 High entropy intermetallic compounds:

[0062] According to the ratio shown in Table 3, use an electronic balance to weigh the original metal powder and put it into a cemented carbide tank, and perform a mechanical alloying process through a high-energy ball mill, as follows:

[0063] (1) Mixing: Put Ni powder, Al powder, Ti powder, Nb powder and V powder into the cemented carbide tank equipped with the high-energy ball mill, use cemented carbide balls with a diameter of 3-10 mm as the grinding balls, and place them in the argon In an air atmosphere, mix for 5 h under the conditions of a ball-to-material ratio of 1:1 and a rotational speed of 100 r / min to obtain uniformly mixed initial element powders;

[0064] (2) Alloying: put the uniformly mixed initial element powder into a high-energy ball mill, use cemented carbide balls with a diameter of 3-10 mm as the grinding balls, and use absolute ethano...

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Abstract

The invention relates to a high-entropy intermetallic compound with high strength and wide temperature range wear resistance. The chemical composition of the high-entropy intermetallic compound is Ni 1‑x (Al 1 / 3 Nb 1 / 3 Ti 1 / 3 ) x 、Ni 1‑x (Al 1 / 3 V 1 / 3 Ti 1 / 3 ) x or Ni 1‑x (Al 1 / 4 Nb 1 / 4 Ti 1 / 4 V 1 / 4 ) x Any one of them, where x=0.25~0.5, and the proportion of each element is calculated by atomic percentage. The invention not only has high strength and high hardness, but also exhibits good resistance to high temperature softening and wear resistance in a wide temperature range, and at the same time, the preparation process is simple and the performance reliability is high. It has important application prospects in the wear resistance of key systems in new energy and other fields.

Description

technical field [0001] The invention relates to the technical field of high-strength wear-resistant alloy materials, in particular to a high-entropy intermetallic compound with high strength and wide-temperature-range wear-resistant properties. Background technique [0002] Materials are the material basis for the rapid development of future technology and manufacturing. Exploring new high-performance materials and their design concepts is the eternal goal of the development of materials science. At present, the development of high-end equipment presents the characteristics of "complex service environment, extreme working conditions, extreme core indicators, and functional requirements for performance". The lack of wear-resistant materials and technological development in my country and the lack of high-performance materials have become a key technical bottleneck restricting the development of high-end equipment. Due to their excellent specific strength and thermal stabilit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C1/04B22F3/105B22F9/04
CPCC22C30/00B22F3/105B22F9/04B22F2003/1051B22F2009/043B22F2009/041C22C1/047
Inventor 杨军程军耿钰山刘维民朱圣宇谈辉陈娇孙奇春陈文元
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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