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A kind of molybdenum carbide reinforced molybdenum-based composite material and preparation method thereof in situ

A composite material and in-situ generation technology, applied in the field of powder metallurgy, can solve the problems of lack of research and development, and achieve the effect of simple preparation process, low equipment requirements and low cost

Active Publication Date: 2020-11-17
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mo 2 Due to its high melting point and high hardness, good thermal and mechanical stability, excellent corrosion resistance and other characteristics, C has been used as a reinforcing phase in the field of cermets, but there is no research and development of Mo 2 Published reports on C reinforced molybdenum matrix composites

Method used

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  • A kind of molybdenum carbide reinforced molybdenum-based composite material and preparation method thereof in situ
  • A kind of molybdenum carbide reinforced molybdenum-based composite material and preparation method thereof in situ

Examples

Experimental program
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Effect test

Embodiment 1

[0037] A method for preparing molybdenum carbide-reinforced molybdenum-based composite materials in situ, specifically according to the following steps:

[0038] Step 1, put molybdenum powder and graphene powder into a planetary ball mill (QM-3SP2), pass into an Ar gas atmosphere with a pressure of 0.3MPa, and ball mill and mix for 6h to obtain a mixed powder, wherein the mass fraction of graphene powder in the mixed powder 0.3%; when ball milling and mixing, the ball mill jar and balls are all made of agate, the ball-to-material ratio is 1:1, the balls used have 4 balls with a diameter of 20mm, 20 balls with a diameter of 10mm, and a diameter of 30 6mm balls, the speed of the ball mill is 300r / min;

[0039]Step 2, put the mixed powder into a planetary high-energy ball mill (Retsch-PM400 type), pass through an Ar gas atmosphere with a pressure of 0.3MPa, and perform high-energy ball milling for 15 hours; during high-energy ball milling, first high-energy ball mill for 50 minut...

Embodiment 2

[0043] A method for preparing molybdenum carbide-reinforced molybdenum-based composite materials in situ, specifically according to the following steps:

[0044] Step 1, put the molybdenum powder and graphene powder into a planetary ball mill (QM-3SP2), pass into an Ar gas atmosphere with a pressure of 0.6MPa, and ball mill and mix for 12h to obtain a mixed powder, wherein the mass fraction of the graphene powder in the mixed powder 0.9%; when ball milling and mixing, the ball mill jar and balls are all made of agate, the ball-to-material ratio is 3:1, the balls used have 8 balls with a diameter of 20mm, 30 balls with a diameter of 10mm, and a diameter of 50 6mm balls, the speed of the ball mill is 450r / min;

[0045] Step 2, put the mixed powder into a planetary high-energy ball mill (Retsch-PM400 type), pass through an Ar gas atmosphere with a pressure of 0.6MPa, and perform high-energy ball milling for 30 hours; during high-energy ball milling, first high-energy ball mill fo...

Embodiment 3

[0049] A method for preparing molybdenum carbide-reinforced molybdenum-based composite materials in situ, specifically according to the following steps:

[0050] Step 1, put the molybdenum powder and graphene powder into a planetary ball mill (QM-3SP2), pass into an Ar gas atmosphere with a pressure of 0.5MPa, and ball mill and mix for 9 hours to obtain a mixed powder, wherein the mass fraction of the graphene powder in the mixed powder 0.6%; when ball milling and mixing, the ball mill jar and balls are made of agate, the ball-to-material ratio is 2.1, and the balls used include 6 balls with a diameter of 20mm, 25 balls with a diameter of 10mm, and 6mm balls with a diameter of 6mm. 40 grinding balls, the speed of the ball mill is 350r / min;

[0051] Step 2, put the mixed powder into a planetary high-energy ball mill (Retsch-PM400 type), pass through an Ar gas atmosphere with a pressure of 0.5MPa, and perform high-energy ball milling for 22 hours; during high-energy ball milling...

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Abstract

The invention discloses an in-situ generated molybdenum carbide reinforced molybdenum-based composite material. The composite material comprises the following components of, by mass fraction, 5%-15% of molybdenum carbide, no more than 0.1% of impurities, the balance molybdenum, and the sum of the mass fractions of the above components is 100%. The invention further discloses a preparation method of the in-situ generated molybdenum carbide reinforced molybdenum-based composite material, the preparation method comprises the following steps that ball milling and mixing are carried out on molybdenum powder and graphene powder so as to obtain mixed powder, and high-energy ball milling is carried out on the mixed powder; and the mixed powder after the ball milling treatment is subjected to hot-pressing sintering, the surface layer removing process is carried out. The in-situ generated molybdenum carbide reinforced molybdenum-based composite material is uniform and compact in structure, crystal grains are small, and higher hardness and strength are achieved. The preparation method of the in-situ generated molybdenum carbide reinforced molybdenum-based composite material has the advantagesthat the equipment requirement is low, the preparation process is simple and feasible, the cost is low, and the industrial production is easy to realize.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and relates to an in-situ generated molybdenum carbide reinforced molybdenum-based composite material, and also relates to a preparation method of the in-situ generated molybdenum carbide reinforced molybdenum-based composite material. Background technique [0002] Molybdenum is a precious rare refractory metal material with high melting point, elastic modulus and wear resistance, good electrical and thermal conductivity, low thermal expansion coefficient, good acid and alkali resistance and liquid metal corrosion resistance, etc., so Molybdenum has broad application prospects in various sectors such as aerospace, power electronics, machinery manufacturing, iron and steel metallurgy, energy and chemical industry, medical equipment, and military industry, and is one of the indispensable high-temperature-resistant materials. With the rapid development of science and technology, it is diff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C27/04C22C1/05C22C1/10C22C32/00
CPCC22C1/045C22C1/058C22C27/04C22C32/0052
Inventor 张国君陈璇李瑞王娟
Owner XIAN UNIV OF TECH