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Aluminum-boron nitride nano reticular configuration composite material and preparation method thereof

A composite material, boron nitride technology, applied in the field of aluminum-boron nitride nano-reticular composite material and its preparation, can solve the problems of high thermal expansion coefficient, poor fracture toughness, low strength, etc.

Inactive Publication Date: 2021-09-10
江苏威鹰机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The content of the present invention mainly focuses on the research and development of new high-performance aluminum-based composite materials for automotive air-conditioning scrolls. Aiming at the problems of low strength, poor fracture toughness, and high thermal expansion coefficient of current materials, the research and development of high-strength, good toughness, and thermal expansion The aluminum matrix composite material with low coefficient can improve the comprehensive performance of the scroll and reduce its manufacturing cost

Method used

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  • Aluminum-boron nitride nano reticular configuration composite material and preparation method thereof
  • Aluminum-boron nitride nano reticular configuration composite material and preparation method thereof
  • Aluminum-boron nitride nano reticular configuration composite material and preparation method thereof

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Embodiment 1

[0030] see figure 1 , 2 As shown in and 3, an aluminum-boron nitride nano-network composite material, including aluminum and boron nitride nanosheets (BNNSs), said BNNSs are uniformly distributed on the surface of Al particles in a two-dimensional sheet, wherein, Al particles It is spherical, and the Al particle size is 10 μm and 40 μm; BNNSs is the reinforcing phase, with a volume ratio of 0.2%-4%, and the size of BNNSs is 300600-700700nm2, and the thickness is 5-100nm. Its preparation method: using Al-BNNSs composite powder as raw material, through cold pressing and SPS sintering, the aluminum-boron nitride nano-network composite material in which BNNSs is evenly distributed on the surface of Al particles in a two-dimensional sheet shape can be obtained, specifically Include the following steps:

[0031] Step 1: Ultrasonic dispersion of hexagonal boron nitride (h-BN) after high-energy ball milling to prepare BNNSs;

[0032] Step 2: Mix BNNSs with aluminum powder, and prep...

Embodiment 2

[0035] see figure 1 , 2 As shown in and 3, an aluminum-boron nitride nano-network composite material, including aluminum and boron nitride nanosheets (BNNSs), said BNNSs are uniformly distributed on the surface of Al particles in a two-dimensional sheet, wherein, Al particles Spherical, Al particle size is 10 μm and 40 μm; BNNSs is the reinforcement phase, the volume ratio is 0.2%-4%, and the size of BNNSs is 300600-700700nm 2, the thickness is 5-100nm. The preparation method specifically includes the following steps: Step 1: Put the h-BN powder in a ball mill jar, place 100ml alcohol and 10g h-BN in each ball mill jar, the ball-to-material ratio is 20:1, and the weight ratio of large, medium and small grinding balls They are 5:3:2, the diameters of the grinding balls are 15mm, 10mm, and 5mm respectively, and the materials of the ball milling tank and the balls are all stainless steel; the ball milling atmosphere is Ar gas; the ball milling speed is set to 350r / min, and the ...

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Abstract

The invention discloses an aluminum-boron nitride nano reticular configuration composite material. The composite material comprises aluminum and boron nitride nanosheets (BNNSs) and is characterized in that the BNNSs are uniformly distributed on the surfaces of Al particles in a lamellar manner, wherein the Al particles are spherical, the BNNSs are a reinforcement phase, the size of the BNNSs is 300600-700700 nm < 2 >, and the thickness of the BNNSs is 5-100 nm. A preparation method of the composite material comprises the steps that aluminum and boron nitride nanosheet (BNNSs) composite powder is subjected to cold pressing to form a composite block, and the composite block is subjected to SPS sintering to obtain the nanometer reticular configuration composite material. The composite material is small in thermal expansion coefficient, high in mechanical property, short in production technological process and low in production cost.

Description

technical field [0001] The invention relates to an aluminum-boron nitride nanometer mesh composite material and a preparation method thereof. Background technique [0002] Aluminum matrix composites have a series of outstanding performance advantages such as high specific strength and specific stiffness, good high temperature performance, good fatigue resistance and wear resistance, and low thermal expansion coefficient. In terms of production and manufacturing, aluminum matrix composites can be processed and processed with conventional equipment and processes. In terms of resources and cost, aluminum resources are abundant and the cost is relatively low. Aluminum-based composite materials have been widely used in the manufacture of aircraft landing gear, high-speed trains, and precision instruments, which not only reduces the weight of structural parts, but also improves their overall performance. The State Intellectual Property Office discloses an aluminum-boron nitride ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C21/00C22C1/10B22F3/14B22F3/24B22F9/04
CPCC22C1/05C22C21/00B22F9/04B22F3/14B22F3/24
Inventor 李瑞涛顾宇佳张太良王匀刘振强万伟超林欣张扣宝申剑严志军
Owner 江苏威鹰机械有限公司