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In-situ CNTs@Ti hybrid reinforced aluminum-based composite material and preparation method thereof

A technology to strengthen aluminum-based and composite materials, which is applied in metal material coating technology, metal processing equipment, gaseous chemical plating, etc., can solve the problem of uneven distribution of CNTs and achieve the effect of uniform pipe diameter

Pending Publication Date: 2021-08-27
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Another object of the present invention is to provide the preparation method of the in-situ CNTs@Ti hybrid reinforced aluminum matrix composite material, which solves the defect of uneven distribution of CNTs existing in the hybrid reinforced aluminum matrix composite material in the past, and improves the interfacial bonding performance. Specifically include the following steps:

Method used

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  • In-situ CNTs@Ti hybrid reinforced aluminum-based composite material and preparation method thereof
  • In-situ CNTs@Ti hybrid reinforced aluminum-based composite material and preparation method thereof
  • In-situ CNTs@Ti hybrid reinforced aluminum-based composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030]The raw materials used in this example are: pure aluminum powder (purity > 99.95%, particle size 25 μm), titanium powder (purity > 99.9wt.%, particle size 20 μm, spherical), of which the weight percentage of pure aluminum powder is 96%, and the hybrid enhancement The weight percentage of phase CNTs@Ti is 4%, and the specific steps are as follows:

[0031] (1) Uniform 1.5wt.% catalyst metal Co particles were plated on the surface of Ti powder by deposition-precipitation method; Co(NO 3 ) 2 ·6H 2 O and Ti powders were placed in a beaker filled with deionized water, where Me(NO 3 ) 2 ·6H 2 The mass of O is 0.2221g, and the mass of Ti powder is 3g; then Co (NO 3 ) 2 ·6H 2 O was completely dissolved in deionized water by stirring with a magnetic stirrer; then gradually dripped 0.1mol / L NaOH and Co (NO 3 ) 2 ·6H 2 O is completely and fully reacted, continuously stirred for 1h, and stood for 24h to obtain Co (OH) 2 / Ti binary colloid.

[0032] (2) Put the binary col...

Embodiment 2

[0037] The raw materials used in this example are: pure aluminum powder (purity > 99.95%, particle size 25 μm), titanium powder (purity > 99.9wt.%, particle size 10 μm, spherical), wherein the weight percentage of pure aluminum powder is 92%, The weight percentage of the hybrid reinforcement phase CNTs@Ti is 8%, and the specific steps are as follows:

[0038] (1) Uniform 0.5wt.% catalyst metal Ni particles were plated on the surface of Ti powder by deposition-precipitation method; Ni(NO 3 ) 2 ·6H 2 O and Ti powders were put into a beaker filled with deionized water, in which Ni (NO 3 ) 2 ·6H 2 The mass of O is 0.74g, and the mass of Ti powder is 3g; then Ni (NO 3 ) 2 ·6H 2 O was completely dissolved in deionized water by stirring with a magnetic stirrer; then gradually dripped 0.4mol / L NaOH and Ni (NO 3 ) 2 ·6H 2 O fully reacted, continued to stir for 1h, and stood still for 24h to obtain Ni (OH) 2 / Ti binary colloid.

[0039] (2) Then place the binary colloid afte...

Embodiment 3

[0044] The raw materials used in this example are: pure aluminum powder (purity > 99.95%, particle size 25 μm), particle size 1 μm, spherical shape), a total of 30 g, of which the weight ratio of pure aluminum powder is 88%, and the hybrid reinforcement phase CNTs@Ti Percentage by weight is 12%, and concrete steps are as follows:

[0045] (1) Uniform catalyst metal Ni particles were plated on the surface of Ti powder by deposition-precipitation method; Ni (NO 3 ) 2 ·6H 2 O and Ti powders were put into a beaker filled with deionized water, in which Ni (NO 3 ) 2 ·6H 2 The mass of O is 0.2228g, and the mass of Ti powder is 3g; then Ni (NO 3 ) 2 ·6H 2 O was completely dissolved in deionized water by stirring with a magnetic stirrer; then gradually dripped 0.3mol / L NaOH and Ni (NO 3 ) 2 ·6H 2 O fully reacted, continued to stir for 1h, and stood still for 24h to obtain Ni(OH) 2 / Ti binary colloid.

[0046] (2) Then place the binary colloid after standing still in a sucti...

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Abstract

The invention discloses an in-situ CNTs@Ti hybrid reinforced aluminum-based composite material and a preparation method thereof, and relates to the field of composite materials. CNTs which are evenly distributed, uniform in pipe diameter, high in purity and good in crystallinity are synthesized on the surfaces of spherical Ti particles in situ through a chemical vapor deposition (CVD) method, CNTs@Ti are dispersed into an Al matrix through mechanical ball milling, evenly-dispersed CNTs@Ti / Al composite powder is obtained, and the composite material is prepared through spark plasma sintering (SPS). A CNTs@Ti hybrid reinforced phase is prepared through the in-situ vapor deposition method, the simple low-speed short-time ball milling method is combined, the CNTs can be evenly dispersed in the Al matrix, under the high-temperature long-time effect in the sintering process, Ti and the Al matrix react to generate TiAl3, the CNTs and Al or Ti generate nanophase Al4C3 and TiC, good interface bonding is formed, and the tensile strength and ductility of the composite material are improved.

Description

technical field [0001] The invention relates to an in-situ CNTs@Ti hybrid reinforced aluminum matrix composite material and a preparation method thereof, and belongs to the technical field of multiphase hybrid reinforced aluminum matrix composite material preparation. Background technique [0002] Aluminum metal has many advantages such as low density, good plasticity, good corrosion resistance, etc., and is widely used. However, the strength of pure aluminum and aluminum alloys is generally low, and the development of aluminum matrix composites has attracted much attention. Carbon nanotube-reinforced aluminum matrix composites are expected to have the characteristics of light weight, high strength, good plasticity and corrosion resistance, and have good application prospects in aerospace, precision instruments and transportation. Making full use of the performance of a single CNT in the early stage is the prerequisite for CNTs to improve the overall performance of composit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/05B22F1/02C23C16/44C23C16/26C23C16/02B22F9/04B22F3/105
CPCC22C21/00C22C21/003C22C1/05C23C16/4417C23C16/26C23C16/0272B22F9/04B22F3/105B22F2009/043B22F1/17B22F1/16
Inventor 李才巨李雪杨晨茂月易健宏高鹏鲍瑞游昕刘意春方东陶静梅李凤仙谈松林
Owner KUNMING UNIV OF SCI & TECH
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