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In-situ synthesized TiB2 particle-reinforced Al matrix composite and preparation method thereof

A composite material and in-situ generation technology, which is applied in the field of composite materials, can solve problems such as uneven distribution and large particles, and achieve the effect of uniform distribution, small particle size and improved performance

Active Publication Date: 2018-11-13
XIANGTAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This preparation method solved the TiB 2 TiB in / Al composites 2 Particles are too large and unevenly distributed, and at the same time, the disproportionation reaction of fluoride salts in the aluminum melt is eliminated, and the prepared TiB 2 TiB in / Al composites 2 High particle purity, TiB 2 / Al composite material has excellent performance

Method used

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  • In-situ synthesized TiB2 particle-reinforced Al matrix composite and preparation method thereof
  • In-situ synthesized TiB2 particle-reinforced Al matrix composite and preparation method thereof
  • In-situ synthesized TiB2 particle-reinforced Al matrix composite and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] In situ self-generated TiB 2 Preparation method of particle reinforced aluminum matrix composite material:

[0075](1) Put 250g ZL109 polished on the surface into a drying oven at 100°C, and dry it for 2 hours to remove moisture; add ZL109 aluminum alloy to a crucible preheated at 650°C, and put it in an electromagnetic induction furnace to heat up to 850°C to ZL109 melt into a melt.

[0076] (2) weighed 86.35g of K 2 TiF 6 The powder (analytical pure, produced by Guangdong Wengjiang Chemical Reagent Co., Ltd.) was placed in a drying box at 100 °C for 2 hours to fully remove the moisture of the powder. At the same time, a graphite stirring rod was used to stir the ZL109 melt at 600 r / min and a melt vortex was formed. 2 TiF 6 The powder was added to the melt vortex to make the fluoride salt fully react in the melt, and the stirring rod was stirred for 10 minutes. After the stirring was completed, the ZL109 melt was allowed to stand for 30 minutes.

[0077] (3) Add ...

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Abstract

The invention belongs to the field of composites, and discloses an in-situ synthesized TiB2 particle-reinforced Al matrix composite and a preparation method thereof. The in-situ synthesized TiB2 particle-reinforced Al matrix composite comprises an Al alloy and submicron TiB2 particles, wherein the Al alloy is adopted as a matrix; and the submicron TiB2 particles are formed inside the matrix in anin-situ manner. The preparation method comprises the following steps: (1) preparing an Al3Ti / Al intermediate composite; (2) preparing an AlB2 / Al intermediate composite; and (3) preparing a TiB2 / Al composite. The preparation method is simple in process and easy to operate; and the particles of the prepared AlB2 / Al intermediate composite are small and distributed more uniformly.

Description

technical field [0001] The invention belongs to the field of composite materials, in particular to an in-situ self-generated TiB 2 Particle reinforced aluminum matrix composite material and preparation method thereof. Background technique [0002] The composite of ceramic particles and aluminum alloy, using the high strength and high hardness of ceramics to strengthen the aluminum alloy matrix, the obtained ceramic particle reinforced aluminum matrix composite material shows excellent properties, such as low density, high specific strength and specific stiffness, high elasticity Modulus, good wear resistance, high thermal conductivity and low coefficient of thermal expansion. Therefore, ceramic particle-reinforced aluminum matrix composites have broad application prospects in the fields of aerospace and automotive engines. For a long time, the preparation methods of aluminum matrix composites mainly include powder metallurgy method, contact reaction method, etc., but these...

Claims

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Application Information

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IPC IPC(8): C22C1/10C22C1/06C22C1/02C22C21/00C22C32/00
CPCC22C1/06C22C1/1036C22C21/00C22C32/0073C22C1/1052
Inventor 林建国郑兆宏龚伦军张德闯
Owner XIANGTAN UNIV
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