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Multiple boride metal ceramic based on high-entropy alloy adhesion agent and preparation method thereof

A high-entropy alloy and cermet technology, which is applied in the field of multi-component boride cermet and its preparation, can solve the problems of insufficient strength and toughness, affecting the service life, and limiting the use range, so as to improve the interface wettability and refine the crystallinity. The effect of grain, hardness and toughness improvement

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

AI Technical Summary

Problems solved by technology

However, in terms of performance, multi-component boride cermets still have the weakness of insufficient strength and toughness, which not only affects its service life, but also limits its scope of use.

Method used

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  • Multiple boride metal ceramic based on high-entropy alloy adhesion agent and preparation method thereof
  • Multiple boride metal ceramic based on high-entropy alloy adhesion agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Weigh 65g Mo respectively 2 FeB 2Powder, 35g of high-entropy alloy binder phase raw material powder, wherein the high-entropy alloy binder phase raw material powder is iron powder, nickel powder, cobalt powder and aluminum powder, according to the molar ratio of iron, cobalt, nickel and aluminum elements 1:1:1 : 1 preparation. Put the above raw materials together into a ball mill for wet grinding and dispersing, the ball milling speed is 30 rpm, the grinding time is 24 hours, the grinding ball adopts WC-8wt%Co cemented carbide balls with a diameter of φ10mm, and the ball-to-material ratio is 8: 1. The wet grinding medium is anhydrous acetone. The ground mixed slurry was sieved to take out the grinding spheres, and the mixed slurry was separated by precipitation and dried at 80°C for 4 hours to obtain a mixed material. Add paraffin wax as a molding agent according to 3wt% of the weight of the mixture, mix evenly, then granulate and dry to obtain mixed pellets with goo...

Embodiment 2

[0040] Weigh 40g Mo respectively 2 FeB 2 Powder, 40gW 2 FeB 2 powder and 20g of high-entropy alloy binder phase raw material powder, wherein the high-entropy alloy binder phase raw material powder is titanium-iron alloy powder, chromium-nickel alloy powder, iron powder, copper powder and vanadium powder, according to iron, cobalt, nickel, chromium, titanium , Copper, vanadium element molar ratio 1:1:1:1:1:1:1:1:1 preparation. Put the above raw materials together into a ball mill for wet grinding and dispersion, the ball milling speed is 30 rpm, and the grinding time is 48 hours. The grinding ball adopts WC-8wt%Co cemented carbide balls with a diameter of φ10mm, and the ball-to-material ratio is 8: 1. The wet grinding medium is absolute ethanol. The ground mixed slurry was sieved to take out the grinding spheres, and the mixed slurry was separated by precipitation and dried at 80°C for 4 hours to obtain a mixed material. Add polyethylene glycol as a molding agent according...

Embodiment 3

[0042] Weigh 450g Mo respectively 2 NiB 2 Powder, 450gW 2 NiB 2 powder and 30g high-entropy alloy binder phase raw material powder, wherein the high-entropy alloy binder phase raw material powder is iron powder, nickel powder, zirconium powder, molybdenum powder and manganese powder, according to the molar ratio of iron, nickel, zirconium, molybdenum and manganese 1:1:1:1:1 formulation. Put the above raw materials together into a ball mill for wet grinding and dispersion, the ball milling speed is 26r / min, the grinding time is 10 hours, the grinding balls are WC-8wt%Co cemented carbide balls with a diameter of φ10mm, and the ball-to-material ratio is 10:1 , the wet grinding medium is methanol. The ground mixed slurry was sieved to take out the grinding spheres, and the mixed slurry was separated by precipitation and dried at 80°C for 4 hours to obtain a mixed material. Add SD glue as a forming agent according to 2wt% of the weight of the mixture, mix evenly, then granulat...

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Abstract

The invention discloses a multiple boride metal ceramic based on a high-entropy alloy adhesion agent and a preparation method thereof. According to the boride metal ceramic, high-entropy alloy serves as an adhesion phase, multiple boride serves as a hard phase, the high-entropy alloy adhesion phase is composed of at least four of iron, cobalt, nickel, chromium, aluminum, vanadium, titanium, copper, zirconium, molybdenum and manganese, and the content mole ratio of each element is between 5% and 35%. The multiple boride hard phase comprises W2M1B2 or / and Mo2M2B2, wherein M1 and M2 are at least one of Fe, Ni, Co and Cr. The preparation method of the multiple boride metal ceramic based on the high-entropy alloy adhesion agent comprises the steps of ball-milling mixing, forming and low-pressure sintering.

Description

[0001] technical field [0002] The invention belongs to the technical field of cermet material preparation, and in particular relates to a multi-component boride cermet based on a high-entropy alloy binder and a preparation method thereof. Background technique [0003] For traditional cemented carbide, it uses a large amount of strategic resources such as tungsten and cobalt, and the cost is relatively high. Therefore, cermet composites that do not contain precious metals such as cobalt have important use value and strategic significance because of their excellent wear resistance, corrosion resistance, and heat resistance. Boride cermets have the characteristics of high hardness, high flexural strength, low density, high fracture toughness, high wear resistance, and good corrosion resistance, making them a good alternative material. In the 1980s, Japan's Toyo Kohan company researched and developed the reaction boride sintering method, which solved the problem of poor sinte...

Claims

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Application Information

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IPC IPC(8): C22C29/14C22C1/05
Inventor 刘颖叶金文王杰
Owner SICHUAN UNIV
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