Ultra-fine grain high-entropy metal ceramic composite material and preparing method thereof

A composite material and cermet technology, which is applied in the field of ultrafine-grained high-entropy cermet composite materials and their preparation, can solve the problems of poor comprehensive performance of cermets, health hazards, low wettability, etc., and can improve the room temperature. and high temperature performance, extended application range, good plasticity

Inactive Publication Date: 2019-11-08
FUJIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in recent years, foreign scholars have found that cobalt has certain radiation, and long-term use will cause certain harm to human health, and cobalt, as a national strategic resource, is expensive; The humidity is relatively low, and the overall performance of the prepared cermet is not very good

Method used

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  • Ultra-fine grain high-entropy metal ceramic composite material and preparing method thereof
  • Ultra-fine grain high-entropy metal ceramic composite material and preparing method thereof
  • Ultra-fine grain high-entropy metal ceramic composite material and preparing method thereof

Examples

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Effect test

Embodiment 1

[0027] An ultrafine-grained high-entropy cermet composite material is composed of 94wt.% (MoTiWTaZr)C high-entropy ceramics as the hard phase and 6wt.% FeCoCrNiAl high-entropy alloy as the metal binder phase.

[0028] The specific preparation process is as follows: respectively weighing five kinds of carbide powders of molybdenum carbide, titanium carbide, tungsten carbide, tantalum carbide and zirconium carbide and five kinds of metal elemental powders of iron, cobalt, chromium, nickel and aluminum (purity ≥ 99.5%) , the molar amount of each carbide powder or metal elemental powder is equal; the carbide powder is put into a ball mill jar, and the cemented carbide balls are loaded according to the ball-to-material ratio of 15:1, and high-energy ball milling (ball milling) is carried out in an argon atmosphere The rotating speed is 250rpm; every ball milling is 30min, stop cooling for 5 minutes, the total time of ball milling is 20h), and prepare high-entropy ceramic powder; put...

Embodiment 2

[0030] An ultrafine-grained high-entropy cermet composite material is composed of 92wt.% (MoTiWTaZr)C high-entropy ceramics as the hard phase and 8wt.% FeCoCrNiAl high-entropy alloy as the metal binder phase.

[0031] The specific preparation process is as follows: respectively weighing five kinds of carbide powders of molybdenum carbide, titanium carbide, tungsten carbide, tantalum carbide and zirconium carbide and five kinds of metal elemental powders of iron, cobalt, chromium, nickel and aluminum (purity ≥ 99.5%) , the molar amount of each carbide powder or metal elemental powder is equal; the carbide powder is put into a ball mill jar, and the cemented carbide balls are loaded according to the ball-to-material ratio of 15:1, and high-energy ball milling (ball milling) is carried out in an argon atmosphere The rotating speed is 250rpm; every ball milling is 30min, stop cooling for 5 minutes, the total time of ball milling is 20h), and prepare high-entropy ceramic powder; put...

Embodiment 3

[0033] An ultrafine-grained high-entropy cermet composite material, which is composed of 90wt.%, (MoTiWTaZr)C high-entropy ceramics as the hard phase, and 10wt.% FeCoCrNiAl high-entropy alloy as the metal binder phase.

[0034]The specific preparation process is as follows: Weigh five kinds of carbide powders of molybdenum carbide, titanium carbide, tungsten carbide, tantalum carbide and zirconium carbide and five kinds of metal elemental powders of iron, cobalt, chromium, nickel and aluminum (purity ≥ 99.5%) , the molar amount of each carbide powder or metal elemental powder is equal; the carbide powder is put into a ball mill jar, and the cemented carbide ball is put into the cemented carbide ball according to the ball-to-material ratio of 15:1, and high-energy ball milling (ball milling) is carried out in an argon atmosphere The rotating speed is 250rpm; every ball milling is 30min, stop cooling for 5 minutes, the total time of ball milling is 20h), and prepare high-entropy ...

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Abstract

The invention discloses an ultra-fine grain high-entropy metal ceramic composite material and a preparing method thereof. The composite material is made with (MoTiWTaZr)C high-entropy ceramic as a hard phase and FeCoCrNiAl high-entropy alloy as a metal bonding phase. Specifically, five kinds of carbide powder of molybdenum carbide, titanium carbide, tungsten carbide, tantalum carbide and zirconiumcarbide are subjected to high-energy ball milling to form high-entropy ceramic powder, five kinds of metal powder of iron, cobalt, chromium, nickel and aluminum are subjected to high-energy ball milling to form single-phase solid solution high-entropy alloy powder, high-entropy ceramic powder and high-entropy alloy powder are mechanically mixed, through discharge plasma sintering, the ultra-finegrain high-entropy metal ceramic composite material is obtained, and the comprehensive performance of the obtained composite is obviously improved.

Description

technical field [0001] The invention belongs to the field of metal-ceramic composite material preparation, and in particular relates to an ultrafine-grain high-entropy metal-ceramic composite material and a preparation method thereof. Background technique [0002] High-entropy ceramics are derived from the design concept of high-entropy alloys, and are materials prepared using the concept of entropy stability. Multi-principal high-entropy materials generally contain 5 or more elements that are thermodynamically chaotic and distributed in the material system. The solid solution strengthening mechanism brought by multi-principal element design can significantly improve the mechanical properties of materials. However, there are few reports on high-entropy ceramic materials at home and abroad, and the strength, toughness and high-temperature performance of the materials are not high. Improving the strength, toughness and high temperature performance of high-entropy ceramic mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/06C22C1/05B22F3/105
CPCB22F3/105B22F2003/1051B22F2009/042B22F2998/10C22C1/051C22C29/067B22F2009/043
Inventor 戴品强李战江常发洪春福田君
Owner FUJIAN UNIV OF TECH
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