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AlMgB14/graphene compound powder material and preparation method thereof

A graphene composite and powder material technology, applied in the field of lubricating and wear-resistant materials, can solve the problems of easy oxidation of powder, low material purity, affecting the performance of composite materials, etc., and achieve the effects of low cost and simple preparation process

Inactive Publication Date: 2018-11-02
王岚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current constraints on AlMgB 14 A key issue in the application of base materials in coatings and composite reinforcement phases is the AlMgB 14 The powder is prone to oxidation during the preparation process, and the material purity is low, which ultimately affects the performance of the composite material

Method used

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  • AlMgB14/graphene compound powder material and preparation method thereof

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preparation example Construction

[0018] AlMgB as above 14 The preparation method of / graphene composite powder material, concrete steps are as follows:

[0019] (1) Weigh aluminum powder, magnesium powder, boron powder and graphene according to mass ratio, put them into agate jar for high-energy ball milling;

[0020] (2) Put the mixture obtained in step (1) into a graphite can, then place the graphite can in a sintering furnace, sinter at high temperature, and then cool naturally to obtain AlMgB 14 / Graphene composite powder material.

[0021] In step (1), the rotational speed of the high-energy ball mill is 1200r / min, the ball-to-material ratio is 10:1, and the time is 2-5h.

[0022] The high-temperature sintering in step (2) is carried out under the protection of high-purity nitrogen, the heating rate of the sintering furnace is 10-20°C / min, the sintering temperature is 1300-1400°C, and the holding time is 30-60 min.

[0023] Analysis of AlMgB by X-ray Diffraction Method 14 / AlMgB in graphene composite ...

Embodiment 1

[0025] Weigh aluminum powder, magnesium powder, boron powder and graphene according to the mass ratio of 1:0.95:5.61:0.5, put them into an agate jar for high-energy ball milling, the high-energy ball milling speed is 1200r / min, the ball-to-material ratio is 10:1, and the time is 2h ;After high-energy ball milling, put the mixed materials into graphite cans, and then put the graphite cans in the sintering furnace. Cool to get AlMgB 14 / Graphene composite powder material.

Embodiment 2

[0027] Weigh aluminum powder, magnesium powder, boron powder and graphene according to the mass ratio of 1: 1.00:5.61:1.0, and put them into an agate jar for high-energy ball milling. . After high-energy ball milling, put the mixed materials into graphite cans, then place the graphite cans in a sintering furnace, under the protection of high-purity argon, the heating rate is 12°C / min, the sintering temperature is 1320°C, the holding time is 40min, and then naturally cooled , to get AlMgB 14 / Graphene composite powder material.

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Abstract

The invention discloses an AlMgB14 / graphene compound powder material. The material is prepared from aluminium powder, magnesium powder, boron powder and graphene, wherein the mass ratio of the aluminium powder to the magnesium powder to the boron powder to the graphene is 1:(0.95-1.15):5.61:(0.5-2.5). The prepared material is higher in purity, by introducing the graphene into an AlMgB14 material,the excellent performance of the graphene is fully utilized, the mechanical performance of the compound material is improved comprehensively, and the material has a very important significance to graphene application technology development.

Description

technical field [0001] The invention belongs to the technical field of lubricating and wear-resistant materials, in particular to an AlMgB 14 / Graphene composite powder material and preparation method thereof. Background technique [0002] Ternary boride AlMgB 14 It is one of the research hotspots in the field of superhard materials in the world, and has attracted widespread attention from scholars at home and abroad in recent years. Unlike traditional metastable superhard materials such as diamond and cubic boron nitride, AlMgB 14 Superhard materials are equilibrium materials with high hardness, low density, low coefficient of friction, high thermal stability and good thermoelectric properties. The Ames National Laboratory of the United States reported the ternary boride AlMgB for the first time 14 Synthesis and Properties of Superhard Composites, AlMgB Prepared 14 The crystal structure is an icosahedral orthogonal structure, and the Vickers hardness reaches 32-46GPa, ...

Claims

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Application Information

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IPC IPC(8): C01B35/04C01B32/182
CPCC01B35/04C01P2004/80C01B32/182
Inventor 王岚
Owner 王岚