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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: 2021-09-03
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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  • Preparation method of carbide reinforced high-entropy alloy composite material
  • Preparation method of carbide reinforced high-entropy alloy composite material
  • Preparation method of carbide reinforced high-entropy alloy composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0029] a.HEC in Preparation of powder

[0030] Under argon as protective gas atmosphere, 99.5wt% HEA (FeCoNiCrMn): 0.5wt% C (C 7 Hide 16 ) 1500mL of a stainless steel ball mill jar, add diameters of 5mm, 10mm and 15mm latter three stainless steel balls in a stainless steel tank closure body, the weight ratio of three kinds of balls 5: 8: 8, and ball milled HEC in Powder mass ratio was 15: 1, to milling speed 400r / min, 40h after milling to give FeCoNiCrMn / C powder, i.e. HEC in powder.

[0031] b.HEC ex Preparation of powder

[0032] The 95wt% HEC in : 5wt% ceramic carbide (TaC and TiC molar ratio of 1: 1) was placed in a stainless steel ball mill jar 1500mL added diameters of 5mm, the latter three stainless steel balls of 15mm and 10mm stainless steel cans closure three ball weight ratio of 5: 8: 8, and ball milled HEC ex Powder mass ratio was 15: obtain FeCoNiCrMn / C / TaC / TiC powders, the next step is the spark plasma sintering SPS after 1, ball speed is set to 400r / min,...

Embodiment approach 2

[0037] a.hec in Powder preparation

[0038] 99.5 wt% HEA (FECONICRMN): 0.5 wt% C (C) was 99.5 wt% Hea: 0.5% C (C) at a atmosphere of argon 7 Hide 16 Placed in 1500 ml of stainless steel ball grinding, the addition of three stainless steel grinding balls of 5mm, 10 mm, and 15 mm, respectively, and the weight ratio of three balls is 5: 8: 8, grinding ball and HEC. in The mass ratio of the powder is 15: 1, the ball mill is set to 400r / min, and the ball mill is worn for 40 h to get FECONICRMN / C powder, ie HEC in powder.

[0039] B.hec ex Powder preparation

[0040] 95WT% HEC in The 5 wt% ceramic carbide (Tac and TiC molar ratio was 1: 1) placed in 1500 ml of stainless steel ball grinding, the addition of three stainless steel grinding balls of 5mm, 10mm and 15mm, respectively, respectively, three kinds of stainless steel cans, three The weight ratio of the ball is 5: 8: 8, grinding ball and HEC ex The mass ratio of the powder is 15: 1, the ball mill is set to 400r / min, and the b...

Embodiment approach 3

[0045] a.hec in Powder preparation

[0046] 99.5 wt% HEA (FECONICRMN): 0.5 wt% C (C) was 99.5 wt% Hea: 0.5% C (C) at an atmosphere of argon to protect gas. 7 Hide 16 Placed in 1500 ml of stainless steel ball grinding, the addition of three stainless steel grinding balls of 5mm, 10 mm, and 15 mm, respectively, and the weight ratio of three balls is 5: 8: 8, grinding ball and HEC. in The mass ratio of the powder is 15: 1, the ball mill is set to 400r / min, and the ball mill is worn for 40 h to get FECONICRMN / C powder, ie HEC in powder.

[0047] B.hec ex Powder preparation

[0048] 95WT% HEC in The 5 wt% ceramic carbide (Tac and TiC molar ratio was 1: 1) placed in 1500 ml of stainless steel ball grinding, the addition of three stainless steel grinding balls of 5mm, 10mm and 15mm, respectively, respectively, three kinds of stainless steel cans, three The weight ratio of the ball is 5: 8: 8, grinding ball and HEC ex The mass ratio of the powder is 15: 1, the ball mill is set to 400r...

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Abstract

The invention relates to a scheme for preparing a carbide reinforced high-entropy alloy composite material (HEC) by adopting mechanical alloying (MA) and spark plasma sintering (SPS), in particular to a method for preparing a high-entropy compound by introducing carbide into a high-entropy alloy in two manners at the same time. The method comprises the steps that (1) a hydrocarbon additive is introduced into the high-entropy alloy in a manner of generating the carbide through a mechanical alloying reaction to prepare an in-situ high-entropy alloy composite material called HECin for short; and (2) carbide particles are added into the high-entropy alloy to prepare an ex-situ high-entropy alloy composite material called HECex for short. The method is explained in detail by taking preparation of the FeCoNiCrMn high-entropy alloy composite material as a typical case. The preparation method comprises the following steps that FeCoNiCrMn / C powder, namely, HECin powder, is prepared from five kinds of metal powder of Fe, Co, Ni, Cr and Mn and a ball milling control agent C7H16 through mechanical alloying; then TaC powder and TiC powder are added and mixed to obtain FeCoNiCrMn / C / TaC / TiC powder, namely, HECex powder; and finally, the FeCoNiCrMn high-entropy alloy composite material (HEC) is obtained through spark plasma sintering.

Description

Technical field [0001] This application is in the field of high entropy alloy composite material, in particular, to a method for preparing high entropy enhancement carbide alloy composite material (HEC) of. Background technique [0002] It alloys as a new multi-component alloy, breaking the limitations of traditional single main alloy component elements, excellent performance over a wide temperature range can be maintained stable, generally constitute conventional alloys (e.g., steel or aluminum-based, magnesium, and titanium component) alternatives. FeCoNiCrMn alloy is a typical alloy having a high entropy single FCC structure with high ductility and high fracture toughness at room and low temperatures. However, the yield strength of the alloy is pure FeCoNiCrMn 800 MPa or only, the lower limit of yield strength and hardness Further applications in the field of construction. Therefore, how to increase while ensuring high entropy FeCoNiCrMn the alloy itself has excellent strength...

Claims

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Application Information

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Patent Type & Authority Applications(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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