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Preparation process of FeCrCoMnNi high-entropy alloy based composite material

A preparation process and composite material technology are applied in the field of preparation of high-entropy alloy-based composite materials to achieve the effects of high hardness, simple structure and broad application prospects.

Active Publication Date: 2019-09-20
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using high-entropy alloy powders as raw materials, high-entropy alloy matrix composites are rarely reported by spark plasma sintering.

Method used

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  • Preparation process of FeCrCoMnNi high-entropy alloy based composite material
  • Preparation process of FeCrCoMnNi high-entropy alloy based composite material
  • Preparation process of FeCrCoMnNi high-entropy alloy based composite material

Examples

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Effect test

Embodiment 1

[0026] In this embodiment, the process of preparing FeCrCoMnNi high-entropy alloy-based composite material by spark plasma sintering is as follows:

[0027] 1. Preparation of mixed powder

[0028] Weigh 3wt% nano-TiC powder and 97wt% FeCrCoMnNi high-entropy alloy powder, pour the two powders into a stainless steel ball mill tank, add cemented carbide balls, the ball-to-material ratio is 10:1, the ball mill tank is first evacuated and then filled with argon Air, ball milled for 20 hours until completely mixed uniformly, the reaction sintered mixed powder is obtained;

[0029] 2. Assembly

[0030] Prepare a graphite mold with an inner diameter of 20mm, two matching graphite indenters, two graphite gaskets, and graphite paper; cut the graphite paper into two circular graphite papers with a diameter of 20mm and a rectangle that just covers the inner wall of the graphite mold Graphite paper: Paste the rectangular graphite paper on the inner wall of the graphite mold, and assemble...

experiment example 2

[0035] In this embodiment, the process of preparing FeCrCoMnNi high-entropy alloy-based composite material by spark plasma sintering is as follows:

[0036] 1. Preparation of mixed powder

[0037] Weigh 5wt% nano-TiC powder and 95wt% FeCrCoMnNi high-entropy alloy powder, pour the two powders into a stainless steel ball mill tank, add cemented carbide balls, the ball-to-material ratio is 10:1, the ball mill tank is first evacuated and then filled with argon Air, ball milled for 20 hours until completely mixed uniformly, the reaction sintered mixed powder is obtained;

[0038] 2. Assembly

[0039] Prepare a graphite mold with an inner diameter of 20mm, two matching graphite indenters, two graphite gaskets, and graphite paper; cut the graphite paper into two circular graphite papers with a diameter of 20mm and a rectangle that just covers the inner wall of the graphite mold Graphite paper: Paste the rectangular graphite paper on the inner wall of the graphite mold, and assemble i...

Embodiment 3

[0044] In this embodiment, the process of preparing FeCrCoMnNi high-entropy alloy-based composite material by spark plasma sintering is as follows:

[0045] 1. Preparation of mixed powder

[0046] Weigh 7wt% nano-TiC powder and 93wt% FeCrCoMnNi high-entropy alloy powder, pour the two powders into a stainless steel ball mill tank, add cemented carbide balls, the ball-to-material ratio is 10:1, the ball mill tank is first evacuated and then filled with argon Air, ball milled for 20 hours until completely mixed uniformly, the reaction sintered mixed powder is obtained;

[0047] 2. Assembly

[0048] Prepare a graphite mold with an inner diameter of 20mm, two matching graphite indenters, two graphite gaskets, and graphite paper; cut the graphite paper into two circular graphite papers with a diameter of 20mm and a rectangle that just covers the inner wall of the graphite mold Graphite paper: Paste the rectangular graphite paper on the inner wall of the graphite mold, and assemble...

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Abstract

The invention discloses a preparation process of a FeCrCoMnNi high-entropy alloy based composite material. The composite material is prepared from FeCrCoMnNi powder and nano TiC powder through a discharge plasma sintering process and comprises the raw materials including, by mass, 91%-97% of the FeCrCoMnNi and 3%-9% of the TiC. According to the preparation process, the performance of the FeCrCoMnNi high-entropy alloy based composite material obtained through discharge plasma sintering is better when the sintering temperature is 1000 DEG C, the loading pressure is 50 MPa, the holding time is 5 min and the TiC addition amount is 7%; and the hardness is 1092.4HV, the room temperature yield strength is 979.7 MPa, and the 600 DEG C high temperature yield strength is 563.6 MPa. The TiC and an M23C6 strengthening phase formed by a reaction are uniformly distributed in a FeCrCoMnNi high-entropy alloy base, and the effect of dispersion strengthening is achieved.

Description

technical field [0001] The invention relates to a preparation process of a FeCrCoMnNi high-entropy alloy-based composite material, and belongs to the field of preparation of high-entropy alloy-based composite materials. Background technique [0002] The design of multi-principal high-entropy alloys breaks through the design limitations of traditional metal materials, and high-entropy alloy materials with excellent properties such as high hardness, high strength, and corrosion resistance can be obtained through reasonable composition design. Among all the currently studied high-entropy alloy systems, the FeCrCoMnNi high-entropy alloy with a stable single-phase face-centered cubic structure (FCC) is the most popular among researchers. The FeCrCoMnNi high-entropy alloy exhibits high plasticity at room temperature and low temperature, and its mechanical properties change slightly with temperature at high temperature, and it has high temperature stability. However, the hardness ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C32/00C22C1/05C22C1/10
CPCC22C1/05C22C30/00C22C32/0052
Inventor 钟志宏翟博汤蔚霞陈畅吴玉程
Owner HEFEI UNIV OF TECH
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