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Aluminium oxide and zirconium diboride reinforced aluminum matrix in-situ composite and preparation method thereof

An in-situ composite material, zirconium diboride technology, applied in metal material coating process, coating, etc., can solve the problems of high production cost, unfavorable, coarse particles, etc., achieve high temperature wear resistance and save production cost , the effect of high hardness and thermal stability

Inactive Publication Date: 2013-09-04
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: the synthetic particles are in the micron level, the particles are relatively coarse, and the reaction needs to be carried out under vacuum and high temperature (800°C), and the production cost is high
In this patent, the chemical reaction occurs after friction stir processing, and its disadvantages are: after friction stir processing, a subsequent induction heating process is required for the chemical reaction to occur, the process steps are complicated, and the TiO 2 and B 2 o 3 Insufficient particle contact is not conducive to the complete reaction

Method used

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  • Aluminium oxide and zirconium diboride reinforced aluminum matrix in-situ composite and preparation method thereof
  • Aluminium oxide and zirconium diboride reinforced aluminum matrix in-situ composite and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Base material: 10mm thick 6061 aluminum alloy plate.

[0026] Added particles: monoclinic zirconia (average particle size 80nm, purity 99.8%), amorphous boron (average particle size 500nm, purity 96%).

[0027] ZrO 2 The particles and B particles were mixed at a mass ratio of 11:2, and the mixed particles were ball milled; the ball milling time was 2 hours, the rotation speed was 80r / min, and the ball-to-material ratio was 15:1.

[0028] Three rows of blind holes are processed in the middle area of ​​the aluminum plate, the hole depth and diameter are both 4mm, and the hole spacing is 2mm.

[0029] After ball milling, the mixed particles are poured into the volatile organic solvent, mixed evenly and then added into the blind hole or groove; after the organic solvent volatilizes, fill again until it is filled;

[0030] Friction stir processing in-situ synthesis process parameters: rotation speed 900r / min, travel speed 60mm / min, press amount 0.1mm, inclination angle 2.5...

Embodiment 2

[0033] Base material: 10mm thick 6061 aluminum alloy plate.

[0034] Added particles: monoclinic zirconia (average particle size 80nm, purity 99.8%), amorphous boron (average particle size 500nm, purity 96%).

[0035] ZrO 2The particles and B particles were mixed at a mass ratio of 11:2, and the mixed particles were ball milled; the ball milling time was 3 hours, the rotation speed was 60r / min, and the ball-to-material ratio was 15:1.

[0036] Three rows of blind holes are processed in the middle area of ​​the aluminum plate, the hole depth and diameter are both 4mm, and the hole spacing is 2mm.

[0037] After ball milling, the mixed particles are poured into the volatile organic solvent, mixed evenly and then added into the blind hole or groove; after the organic solvent volatilizes, fill again until it is filled;

[0038] Friction stir processing in-situ synthesis process parameters: rotation speed 1100r / min, travel speed 50mm / min, press amount 0.2mm, inclination angle 2°,...

Embodiment 3

[0041] Base material: 10mm thick aluminum plate.

[0042] Added particles: monoclinic zirconia (average particle size 80nm, purity 99.8%), amorphous boron (average particle size 500nm, purity 96%).

[0043] ZrO 2 The particles and B particles were mixed at a mass ratio of 11:2, and the mixed particles were ball milled; the ball milling time was 8 hours, the rotation speed was 40r / min, and the ball-to-material ratio was 15:1.

[0044] Three rows of blind holes are processed in the middle area of ​​the aluminum plate, the hole depth and diameter are both 4mm, and the hole spacing is 2mm.

[0045] After ball milling, the mixed particles are poured into the volatile organic solvent, mixed evenly and then added into the blind hole or groove; after the organic solvent volatilizes, fill again until it is filled;

[0046] Friction stir processing in-situ synthesis process parameters: rotation speed 600r / min, travel speed 40mm / min, press amount 0.1mm, inclination angle 2.5°, processi...

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Abstract

The invention relates to an aluminium oxide and zirconium diboride reinforced aluminum matrix in-situ composite and a preparation method thereof. A ZrO2 particle and a B or B2O3 particle are mixed and ball-milled, the mixed particle formed after ball-milling is added into a matrix, a particle filling area of the matrix is processed through stirring friction, the rotating speed, the travel speed, the downward-pressing quantity, the inclination angle, the processing times of a stirring tool are 600-3000 r / min, 30-60 mm / min, 0.05-0.6 mm, 0-3 degrees, and 3-8 respectively, and during the processing process, ZrO2 and B or B2O3 particle is in chemical reaction with the aluminium matrix jointly to finally obtain the aluminium oxide and zirconium diboride reinforced aluminum matrix in-situ composite. In the aluminium matrix composite, the AL2O3 and ZrB2 particle subjected to in-situ synthesis have higher hardness and thermal stability, so that the composite has higher high-temperature-resistance abrasion performance.

Description

technical field [0001] The invention relates to the field of preparation methods of aluminum-based composite materials, in particular to a friction stir processing in-situ synthesis (Al 2 o 3 +ZrB 2 ) method for particle reinforced aluminum matrix composites. Background technique [0002] Aluminum matrix composites have the advantages of high specific strength, high specific modulus, high thermal conductivity, low thermal expansion coefficient, high temperature resistance, wear resistance, etc., and occupy an important position in aerospace, automobile and other manufacturing fields. Compared with fiber-reinforced aluminum-matrix composites, particle-reinforced aluminum-matrix composites have the advantages of isotropy, relatively simple preparation, and relatively low cost, and are currently the focus of research in the field of metal matrix composites. [0003] At present, the preparation of particle-reinforced aluminum matrix composites mainly includes five processing ...

Claims

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Application Information

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IPC IPC(8): C23C24/00
Inventor 杨敏宋超群
Owner SHANDONG UNIV
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