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Particle-reinforced refractory high-entropy composite material and preparation method thereof

A particle-reinforced, composite material technology, applied in the field of particle-reinforced refractory high-entropy composite materials and their preparation, can solve problems such as limiting wide application

Inactive Publication Date: 2021-09-10
有研纳微新材料(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, most refractory high-entropy alloys containing W, Ta, and Mo elements have relatively high densities (>12 g / cm 3 ), and very brittle at room temperature, the elongation at break of NbMoTaW at room temperature in the as-cast state ε p <4.0%, which will limit its wide application

Method used

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  • Particle-reinforced refractory high-entropy composite material and preparation method thereof
  • Particle-reinforced refractory high-entropy composite material and preparation method thereof
  • Particle-reinforced refractory high-entropy composite material and preparation method thereof

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preparation example Construction

[0047] According to an embodiment of the present invention, a method for preparing a particle-reinforced refractory high-entropy composite material is also provided, comprising the following steps:

[0048] Step 1) Weigh the ingredients

[0049] The raw materials are: niobium powder (purity 99.9%, particle size<10μm), molybdenum powder (purity 99.9%, particle size<10μm), tantalum powder (purity 99.9%, particle size<10μm), tungsten powder (purity 99.9%, particle size diameter<10μm), rhenium powder (purity 99.9%, particle size<10μm), WC particles (purity 99.0%, particle size range 1-5μm).

[0050] The selected material is weighed according to the composition ratio.

[0051] Step 2) Alloying by ball milling

[0052] Put niobium powder, molybdenum powder, tantalum powder, tungsten powder, rhenium powder and WC particles into a tungsten carbide ball mill jar for ball mill alloying treatment to obtain mechanical alloyed powder. The ball milling process is filled with argon gas fo...

Embodiment 1

[0057] A particle-reinforced refractory high-entropy composite material, consisting of a refractory high-entropy alloy matrix and uniformly distributed WC particles, wherein the refractory high-entropy alloy matrix is ​​composed of Nb, Mo, Ta, W, and Re elements in an equiatomic ratio , whose chemical formula is recorded as NbMoTaWRe; the amount of WC particles added is 1% of the mass of the refractory high-entropy alloy matrix in weight percentage.

[0058] The preparation method of the particle-reinforced refractory high-entropy composite material comprises the following steps:

[0059] Step 1) Weigh the ingredients, target NbMoTaWRe high entropy alloy 50g, WC particles 0.5g.

[0060] Substance materials used according to the design alloy are:

[0061]

[0062]

[0063] The selected materials were weighed according to the composition ratio to obtain the target particle-reinforced refractory high-entropy composite material NbMoTaWRe-1.0wt%WC.

[0064] Step 2) Alloying...

Embodiment 2

[0080] A particle-reinforced refractory high-entropy composite material, which consists of a refractory high-entropy alloy matrix and uniformly distributed WC particles, wherein the refractory high-entropy alloy matrix uses Nb, Mo, Ta, W, Re elements and according to non- Equivalent atomic ratio composition, its chemical formula is recorded as Nb 20 Mo 13 Ta 27 W 25 Re 15 ; The amount of WC particles added is 5% of the mass of the refractory high-entropy alloy matrix in terms of weight percentage.

[0081] The preparation method of the particle-reinforced refractory high-entropy composite material comprises the following steps:

[0082] Step 1) Weigh the ingredients, the target is Nb 20 Mo 13 Ta 27 W 25 Re 15 High entropy alloy 50g, WC particles 2.5g.

[0083] Substance materials used according to the design alloy are:

[0084]

[0085] The selected material is weighed according to the composition ratio to obtain the target particle reinforced refractory high-ent...

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Abstract

The invention provides a particle-reinforced refractory high-entropy composite material and a preparation method thereof. The particle-reinforced refractory high-entropy composite material comprises a matrix phase and WC particles distributed in the matrix phase, wherein a Nb-Mo-Ta-W-Re alloy composed of Nb, Mo, Ta, W and Re elements serves as the matrix phase; and the mass of the WC particles accounts for 1-10% of the mass of the matrix phase. The Nb-Mo-Ta-W-Re alloy is adopted as the matrix phase and the WC particles are adopted as a reinforcing phase, so that the particle-reinforced refractory high-entropy composite material has high hardness, high compressive strength and stable structure performance; and meanwhile, the particle-reinforced refractory high-entropy composite material is prepared through ball-milling alloying and spark plasma hot-pressing sintering methods, the preparation is easy, and the application prospects are good.

Description

technical field [0001] The invention relates to the technical field of material preparation and application, in particular to a particle-reinforced refractory high-entropy composite material and a preparation method thereof. Background technique [0002] Refractory high-entropy alloys are made of refractory metal elements (W, Mo, Ta, Nb, Hf, Zr, Ti, V, etc.) Alloys made of fractions. Compared with traditional superalloys, refractory high-entropy alloys exhibit more excellent high-temperature strength and good oxidation resistance at high temperatures, for example, NbMoTaW refractory high-entropy alloys still have 405MPa at 1600 °C, while traditional superalloys Haynes230 and Inconel When 718 is above 1200°C, its strength index is close to 0. Therefore, refractory high-entropy alloys containing elements such as W, Ta, and Mo will become the material of choice for ultra-high temperature (above 1400°C) service environments. [0003] However, most refractory high-entropy allo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C32/00C22C1/05B22F9/04B22F3/105
CPCC22C30/00C22C32/0052C22C1/05B22F9/04B22F3/105B22F2009/041B22F2009/043B22F2003/1051
Inventor 胡强盛艳伟赵新明顾涛付东兴王永慧王志刚安宁张富文张金辉刘英杰李楠楠
Owner 有研纳微新材料(北京)有限公司
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