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High-temperature-resistant high-strength-and-toughness molybdenum-based composite material and preparation method thereof

A composite material, molybdenum-based technology, applied in the field of metal composite materials, can solve the problems of poor high temperature creep resistance, high density, easy oxidation and ablation, etc., to improve material toughness, reduce porosity, and ensure material strength and toughness Effect

Active Publication Date: 2021-01-08
INNER MONGOLIA METAL MATERIAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Molybdenum-based metal materials are used in special working conditions, such as rocket nozzles, aircraft hot-end parts, high-temperature gas pipelines, gas distribution valves, high-voltage rectifier components, etc. Molybdenum-based materials such as pure molybdenum and TZM alloy have high density, are easy to oxidize and ablate, Problems such as poor high-temperature creep resistance have many adverse effects on long-term high-temperature service of components

Method used

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  • High-temperature-resistant high-strength-and-toughness molybdenum-based composite material and preparation method thereof
  • High-temperature-resistant high-strength-and-toughness molybdenum-based composite material and preparation method thereof
  • High-temperature-resistant high-strength-and-toughness molybdenum-based composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A molybdenum-based composite material comprising 5% ZrO with a particle size of 0.5 μm by weight fraction 2 Ceramic particles, 1% of CrCoNi alloy with a particle size of 2.5 μm and 94% of molybdenum metal particles with a particle size of 1.5 μm, wherein the weight fractions of Cr, Co and Ni in the CrCoNi alloy are 31%, 34%, and 35% respectively.

[0022] Its preparation method of this implementation molybdenum-based composite material example is:

[0023] a) Put Cr, Co, and Ni simple metals into a vacuum induction melting furnace and melt them at 1750°C to obtain an alloy melt. Electromagnetically stir the alloy melt. After fully stirring, carry out high-pressure gas atomization on the alloy melt , to obtain a spherical CrCoNi medium entropy alloy powder; to sieve the prepared powder, to obtain the added component of the molybdenum-based composite material;

[0024] b) Add appropriate amount of pure molybdenum, CrCoNi medium entropy alloy powder and ZrO 2 Put the cer...

Embodiment 2

[0031] A molybdenum-based composite material comprising, by weight fraction, 2.5% ZrO with a particle size of 1 μm 2 Ceramic particles, 1.5% of CrCoNi alloy with a particle size of 2 μm and 96% of molybdenum metal particles with a particle size of 4 μm, wherein the weight fractions of Cr, Co and Ni in the CrCoNi alloy are 30%, 36%, and 34% respectively.

[0032] Its preparation method of this implementation molybdenum-based composite material example is:

[0033] a) Put Cr, Co, and Ni simple metals into a vacuum induction melting furnace and melt them at 1750°C to obtain an alloy melt. Electromagnetically stir the alloy melt. After fully stirring, carry out high-pressure gas atomization on the alloy melt , the spherical CrCoNi medium entropy alloy powder is obtained, and the prepared powder is sieved to obtain the added component of the molybdenum-based composite material;

[0034] b) Add appropriate amount of pure molybdenum, CrCoNi medium entropy alloy powder and ZrO 2 Put...

Embodiment 3

[0041] A molybdenum-based composite material comprising, by weight fraction, 1.5% ZrO with a particle size of 0.7 μm 2 Ceramic particles, 1.5% of CrCoNi alloy with a particle size of 10 μm and 97% of molybdenum metal particles with a particle size of 0.5 μm, wherein the molar ratio of Cr, Co, and Ni in the CrCoNi alloy is 1:1:1.

[0042] Its preparation method of this implementation molybdenum-based composite material example is:

[0043] a) Put Cr, Co, and Ni simple metals into a vacuum induction melting furnace and melt them at 1700°C to obtain an alloy melt. Electromagnetically stir the alloy melt. After fully stirring, carry out high-pressure gas atomization on the alloy melt , the spherical CrCoNi medium entropy alloy powder is obtained, and the prepared powder is sieved to obtain the added component of the molybdenum-based composite material;

[0044] b) Add appropriate amount of pure molybdenum, CrCoNi medium entropy alloy powder and ZrO 2 Put the ceramic powder into ...

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Abstract

The invention discloses a high-temperature-resistant high-strength-and-toughness molybdenum-based composite material. The high-temperature-resistant high-strength-and-toughness molybdenum-based composite material comprises the following components in percentage by weight: 1.5% to 5% of ZrO2, 1% to 1.5% of CrCoNi alloy and the balance Mo, wherein the CrCoNi alloy comprises the following componentsin percentage by mass: 30% to 36% of Cr, 30% to 36% of Co and 30% to 36% of Ni. According to the high-temperature-resistant high-strength-and-toughness molybdenum-based composite material, entropy alloy powder in CrCoNi is used as an additive component to be applied to preparation of the molybdenum-based composite material; the entropy alloy powder in spherical CrCoNi is a single-phase solid solution, so that densification sintering of a material matrix can be effectively promoted, the toughness of the material is remarkably improved, and the core technical problems of poor toughness and poorformability of the molybdenum-based composite material are solved; vacuum induction sintering is adopted, so that hydrogen embrittlement caused by sintering in a hydrogen atmosphere is avoided, and the strength and toughness of the material are guaranteed; ZrO2 is added into the molybdenum-based composite material, and the strength and toughness of the material are improved through ceramic phase change toughening and dispersion strengthening; and meanwhile, the ZrO2 is added, so that the sintering density of the material can be improved, the porosity is reduced, the contact area between a molybdenum matrix and oxygen is reduced, and the ablation resistance of the material is improved.

Description

technical field [0001] The invention relates to the field of metal composite materials, in particular to a high-temperature-resistant, high-strength and tough molybdenum-based composite material and a preparation method thereof. Background technique [0002] Molybdenum-based high-temperature materials have the characteristics of high melting point, high strength, high elastic modulus, small thermal expansion coefficient, low vapor pressure, good electrical and thermal conductivity, strong corrosion resistance, and excellent high-temperature mechanical properties. They are widely used in national defense, nuclear energy, metallurgy, and machinery. , petrochemical, medical, electronics, aerospace and many other fields. Molybdenum-based metal materials are used in special working conditions, such as rocket nozzles, aircraft hot-end parts, high-temperature gas pipelines, gas distribution valves, high-voltage rectifier components, etc. Molybdenum-based materials such as pure moly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C27/04C22C1/05C22C1/10C22F1/18C22F1/02
CPCC22C1/045C22C1/05C22C27/04C22F1/02C22F1/18
Inventor 曲俊峰赵斌郭在在林广庆杨双燕张武周雅伟燕东明梁西瑶
Owner INNER MONGOLIA METAL MATERIAL RES INST