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TiO particle reinforced CoCrCuFeNi high-entropy alloy and preparation method thereof

A high-entropy alloy and particle-reinforced technology, which is applied in the field of high-conductivity composite metal oxide powder materials and its preparation, can solve the problems of poor chemical stability and difficulty in preparing TiO particle-reinforced structural materials, etc.

Inactive Publication Date: 2017-08-15
GUIZHOU INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although TiO has many advantages, its chemical properties are poor in stability, and it can be converted into trivalent Ti at about 150°C. 2 o 3 , and then converted into TiO 2 , so it is extremely difficult to prepare TiO particle-reinforced structural materials by directly doping TiO particles in the material preparation process. Therefore, no related reports have appeared so far.

Method used

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  • TiO particle reinforced CoCrCuFeNi high-entropy alloy and preparation method thereof
  • TiO particle reinforced CoCrCuFeNi high-entropy alloy and preparation method thereof
  • TiO particle reinforced CoCrCuFeNi high-entropy alloy and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0025] Raw material ratio: TiCO powder 1kg, Co powder 1kg, Cr powder 1kg, Cu powder 1kg, Fe powder 1kg and Ni powder 1kg.

[0026] Process: Mix TiCO powder, Co powder, Cr powder, Cu powder, Fe powder and Ni powder, and react for 20 minutes at a temperature of 1450-1550 °C and a vacuum of 10 Pa to obtain the obtained product. The XRD pattern of high entropy alloy is shown in figure 1 , see metallographic diagram figure 2 , where the equiaxed crystals in the enlarged region are TiO.

Embodiment 2

[0028] Raw material ratio: TiCO powder 1.5kg, Co powder 1.2kg, Cr powder 1.2kg, Cu powder 1.2kg, Fe powder 1.2kg and Ni powder 1.2kg.

[0029] Process: Mix TiCO powder, Co powder, Cr powder, Cu powder, Fe powder and Ni powder, and react for 30 minutes at a temperature of 1300-1400 ° C and a vacuum of 1 Pa to obtain the product.

Embodiment 3

[0031] Raw material ratio: 0.5kg of TiCO powder, 0.8kg of Co powder, 0.8kg of Cr powder, 0.8kg of Cu powder, 0.8kg of Fe powder and 0.8kg of Ni powder.

[0032] Process: After mixing TiCO powder, Co powder, Cr powder, Cu powder, Fe powder and Ni powder, react at a temperature of 1700-2000°C and a vacuum of 8 Pa for 10 minutes to obtain the product.

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Abstract

The invention discloses a TiO particle reinforced CoCrCuFeNi high-entropy alloy. The TiO particle reinforced CoCrCuFeNi high-entropy alloy is mainly prepared by TiCo powder, Co powder, Cr powder, Cu powder, Fe powder and Ni powder. Compared with a CoCrCuFeNi matrix alloy, the particle reinforced high-entropy alloy reduces the resistivity by 20%, improves the heat conducting coefficient by 25%, increases the hardness by 30%, greatly improves the performances on all aspects, and is wide in application, in particular in the field of war industry.

Description

technical field [0001] The invention relates to a composite metal oxide powder material and a preparation method thereof, in particular to a high-conductivity composite metal oxide powder material and a preparation method thereof. Background technique [0002] High-entropy alloy is a new concept of material first proposed by scholars in Taiwan, China in 2004. It is a new design concept of alloy material. The number of components is greater than 5, and the atomic percentage of each component is basically Equally, the resulting material has an extremely high entropy value. Due to the variety of metal elements in this alloy and the large disorder of atomic arrangement, the high entropy effect will inevitably promote the mixing of elements, making the alloy phase composition form a single crystal structure, such as a single body-centered cubic or face-centered cubic structure. , or a mixed structure of the two, inhibits the formation of brittle intermetallic compounds. This me...

Claims

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Application Information

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IPC IPC(8): C22C30/02C22C1/05
CPCC22C30/02C22C1/058
Inventor 秦庆东黄搏威伍玉娇苏向东
Owner GUIZHOU INST OF TECH