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Preparation method of cnts/ti biomimetic micro-nano laminated composite material

A composite material, micro-nano technology, applied in coating, manufacturing tools, metal rolling, etc., can solve the problem that CNTs are difficult to distribute evenly, and achieve the effect of improving uniform plastic deformation ability and reducing elongation at break

Active Publication Date: 2018-10-30
HARBIN INST OF TECH
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  • Description
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  • Application Information

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Problems solved by technology

[0006] The present invention solves the technical problem that CNTs are difficult to distribute evenly in the titanium matrix, and the technical problem that the existing methods cannot maintain sufficient plasticity and toughness while increasing the strength; and provides a CNTs / Ti biomimetic micro-nano laminated composite material Preparation

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specific Embodiment approach 1

[0032] Specific embodiment one: the preparation method of CNTs / Ti biomimetic micro-nano laminated composite material in this embodiment is carried out according to the following steps:

[0033] Step 1. Raw material pretreatment: take a commercial TA1 pure titanium foil with a thickness of 50 μm, and use a volume concentration of 15% HF solution to pretreat the surface of the titanium foil for 10 seconds to remove the oxide film, etc.; carbon nanotube dispersion treatment: first use a volume ratio of 0.3g of carbon nanotubes were acidified with a mixed acid prepared with 2:1 concentrated sulfuric acid and concentrated nitric acid for 5 hours, then diluted to neutrality, and then centrifuged;

[0034] Step 2, prepare a mixed solution with absolute ethanol and acetone with a volume ratio of 1:2, take 500ml, add 0.06g of Al(NO 3 ) 3 and 0.2g of the acidified carbon nanotubes in step 1, ultrasonically dispersed for 8 hours to obtain a CNTS suspension;

[0035]Step 3. Use the tita...

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Abstract

The invention discloses a preparation method for a CNTs / Ti bionic micro-nano laminated composite, and belongs to the technical field of a Ti-based composite. The preparation method aims to solve the technical problems that CNTs are difficultly distributed evenly in a titanium substrate, the CNTs react with the interface of the titanium substrate and the strength and plasticity (toughness) of the Ti-based composite are inverted. The method comprises the steps of using HF solutions to pretreat titanium foil, configurating acidized CNTs into CNTs turbid solutions, obtaining a lot of CNTs / Ti monolayer materials by depositing a nanoscale CNTs / Ti layer on the surface of the titanium foil through an electrophoretic deposition method, then alternately stacking the CNTs / Ti monolayer materials with pure Ti on the uppermost layer and the lowermost layer, and using spark plasma sintering (SPS) in combination with low temperature rolling to prepare the CNTs / Ti bionic micro-nano laminated composite. The CNTs of the CNTs / Ti bionic micro-nano laminated composite are dispersed evenly, and compared with multilayer pure titanium of the substrate, the strength of the CNTs / Ti bionic micro-nano laminated composite is improved by 20%-50%, and the elongation at break is not obviously reduced.

Description

technical field [0001] The invention belongs to the technical field of titanium-based composite materials; in particular, it relates to a preparation method of CNTs / Ti bionic micro-nano laminated composite materials. Background technique [0002] Titanium-based composites have the advantages of high specific strength, high specific modulus, and excellent high-temperature performance, and have great application potential in aerospace vehicles and high-performance weaponry. For a long time, based on the traditional research ideas of metal matrix composites, most researchers always pursue the uniform distribution of reinforcement phase in titanium alloy matrix, and are committed to improving the mechanical properties of titanium matrix composites by increasing the content of reinforcement phase. Although the strength and stiffness of titanium-based composites are significantly improved, the plasticity and toughness are significantly reduced, that is, the strength-toughness (pla...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/38B21B1/40B21B47/02B21B47/00C25D13/16C25D13/02
CPCB21B1/38B21B1/40B21B47/00B21B47/02B21B2001/383B21B2001/386C25D13/02C25D13/16
Inventor 崔喜平田喆李爱滨焦旺范国华王晓军黄陆军耿林
Owner HARBIN INST OF TECH
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