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A kind of preparation method of carbide reinforced high entropy alloy composite material

A high-entropy alloy and composite material technology is applied in the field of preparation of carbide-reinforced high-entropy alloy composite materials. And the effect of wear resistance, high yield strength, high wear resistance

Active Publication Date: 2022-03-15
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Powder metallurgy is a common process for preparing particle-reinforced composite materials, but the heating rate of tube furnace sintering is slow and the holding time is long, and the obtained sample structure has large grains, so it is impossible to obtain high-entropy alloys with excellent comprehensive mechanical properties.

Method used

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  • A kind of preparation method of carbide reinforced high entropy alloy composite material
  • A kind of preparation method of carbide reinforced high entropy alloy composite material
  • A kind of preparation method of carbide reinforced high entropy alloy composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0029] a. HEC in powder preparation

[0030] Under the atmosphere of argon as protective gas, 99.5wt% HEA (FeCoNiCrMn): 0.5wt% C (C 7 h 16 ) placed in a 1500mL stainless steel ball milling tank, adding three kinds of stainless steel grinding balls with diameters of 5mm, 10mm and 15mm respectively, and then sealing the stainless steel tank body. The weight ratio of the three kinds of balls is 5:8:8. in The mass ratio of the powder is 15:1, the ball milling speed is set to 400r / min, and FeCoNiCrMn / C powder is obtained after ball milling for 40h, namely HEC in powder.

[0031] b. HEC ex powder preparation

[0032] 95wt%HEC in : 5wt% ceramic carbide (the molar ratio of TaC and TiC is 1:1) is placed in a 1500mL stainless steel ball mill tank, and three kinds of stainless steel grinding balls with diameters of 5mm, 10mm and 15mm are added to cover the stainless steel tank body. The weight ratio of balls is 5:8:8, grinding balls and HEC ex The mass ratio of the powder is 15:1...

Embodiment approach 2

[0037] a. HEC in powder preparation

[0038] Under the atmosphere of argon as protective gas, 99.5wt% HEA (FeCoNiCrMn): 0.5wt% C (C 7 h 16 ) placed in a 1500mL stainless steel ball milling tank, adding three kinds of stainless steel grinding balls with diameters of 5mm, 10mm and 15mm respectively, and then sealing the stainless steel tank body. The weight ratio of the three kinds of balls is 5:8:8. in The mass ratio of the powder is 15:1, the ball milling speed is set to 400r / min, and FeCoNiCrMn / C powder is obtained after ball milling for 40h, namely HEC in powder.

[0039] b. HEC ex powder preparation

[0040] 95wt%HEC in : 5wt% ceramic carbide (the molar ratio of TaC and TiC is 1:1) is placed in a 1500mL stainless steel ball mill tank, and three kinds of stainless steel grinding balls with diameters of 5mm, 10mm and 15mm are added to cover the stainless steel tank body. The weight ratio of balls is 5:8:8, grinding balls and HEC ex The mass ratio of the powder is 15:1...

Embodiment approach 3

[0045] a. HEC in powder preparation

[0046] Under the atmosphere of argon as protective gas, 99.5wt% HEA (FeCoNiCrMn): 0.5wt% C (C 7 h 16 ) placed in a 1500mL stainless steel ball milling tank, adding three kinds of stainless steel grinding balls with diameters of 5mm, 10mm and 15mm respectively, and then sealing the stainless steel tank body. The weight ratio of the three kinds of balls is 5:8:8. in The mass ratio of the powder is 15:1, the ball milling speed is set to 400r / min, and FeCoNiCrMn / C powder is obtained after ball milling for 40h, namely HEC in powder.

[0047] b. HEC ex powder preparation

[0048] 95wt%HEC in : 5wt% ceramic carbide (the molar ratio of TaC and TiC is 1:1) is placed in a 1500mL stainless steel ball mill tank, and three kinds of stainless steel grinding balls with diameters of 5mm, 10mm and 15mm are added to cover the stainless steel tank body. The weight ratio of balls is 5:8:8, grinding balls and HEC ex The mass ratio of the powder is 15:1...

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Abstract

This application relates to a scheme for preparing carbide-reinforced high-entropy alloy composites (HEC) by mechanical alloying (MA) and spark plasma sintering (SPS). The method for preparing high-entropy compounds from entropy alloys: (1) Introducing hydrocarbon additives into high-entropy alloys to form carbides through mechanical alloying reactions to prepare in-situ high-entropy alloy composites, referred to as HEC in ; (2) Adding carbide particles to high-entropy alloys to prepare ex-situ high-entropy alloy composites, referred to as HEC ex . This patent takes the preparation of FeCoNiCrMn high-entropy alloy composite material as a typical case to describe in detail. The preparation method is as follows: Fe, Co, Ni, Cr, Mn five metal powders and ball milling control agent C 7 h 16 Preparation of FeCoNiCrMn / C powder by mechanical alloying, i.e. HEC in powder. Then add TaC, TiC powder and mix to obtain FeCoNiCrMn / C / TaC / TiC powder, namely HEC ex powder. Finally, FeCoNiCrMn high-entropy alloy composite (HEC) was obtained by spark plasma sintering.

Description

technical field [0001] The application belongs to the field of high-entropy alloy composite materials, and in particular relates to a method for preparing carbide-reinforced high-entropy alloy composite materials (HEC). Background technique [0002] As a new type of multi-component alloy, high-entropy alloy breaks the limitation of single principal element of traditional alloy composition, and its excellent performance can be kept stable in a wide temperature range. It usually constitutes traditional alloys (such as steel or based on aluminum, magnesium and Titanium components) substitutes. FeCoNiCrMn alloy is a typical high-entropy alloy with a single FCC structure, which has high ductility and high fracture toughness at room and low temperatures. However, the yield strength of pure FeCoNiCrMn alloy is only 800 MPa, and its low yield strength and hardness limit its further application in the structural field. Therefore, how to improve the strength and hardness of the FeCo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C30/00C22C32/00B22F9/04B22F3/105
CPCC22C1/05C22C30/00C22C32/0052B22F9/04B22F3/105B22F2009/043B22F2009/041B22F2003/1051
Inventor 刘轶刘璐曹珊刘艳洁董自强
Owner SHANGHAI UNIV
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