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Preparation method and product of in-situ self-generated ceramic phase-reinforced titanium-based composite material

A titanium-based composite material, in-situ self-generation technology, applied in the field of powder metallurgy, can solve the problem of high cost, achieve the effect of reducing process cost, improving operability, and avoiding inert gas environment

Active Publication Date: 2020-07-21
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The main purpose of the present invention is to provide a preparation method and product of an in-situ self-generated ceramic phase-reinforced titanium-based composite material. , while using sintering and strengthening additives (CaC 2 or CaB 6 ) reacts with interstitial elements such as O and C remaining in the matrix, and in situ generates nano-ceramic particle reinforcement phases such as TiB, TiC, Ca-Ti-O and Ti-Si-C, which significantly improves the mechanical properties of the material to solve the existing The technical problem of high cost in the preparation of titanium-based composite materials in the technology

Method used

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  • Preparation method and product of in-situ self-generated ceramic phase-reinforced titanium-based composite material
  • Preparation method and product of in-situ self-generated ceramic phase-reinforced titanium-based composite material

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preparation example Construction

[0036] The invention discloses a method for preparing an in-situ self-generated ceramic phase-reinforced titanium-based composite material, which comprises the following steps:

[0037] (1) Preparation of powder surface treatment agent: 3-aminopropyltrimethoxysilane, vinylbenzylaminoethylaminopropyltrimethoxysilane hydrochloride, 3-diethylenetriaminopropyltrimethoxysilane Dimethylsilane or N,N-dimethyl-3-aminopropyltrimethoxysilane is dissolved in xylene or toluene to obtain a solution with a mass volume concentration of 0.002-0.01g / mL, and then polycarbosilane (PCS) is dissolved in In the above solution, a solution with a mass volume concentration of 0.003-0.05 g / mL is obtained.

[0038] (2) Add hydrogenated dehydrogenated titanium powder with a particle size median diameter D50 of 10-40 μm and an oxygen content less than or equal to 0.15wt.% to the powder surface treatment agent in step (1), seal the inert gas, and mechanically stir for 0.2-0.6h , and then ultrasonically tr...

Embodiment 1

[0045] Using hydrogenated dehydrogenation titanium powder with a median particle size of 16.2 μm and an oxygen content of 0.14wt.% as raw material, the scanning electron microscope morphology photo is as follows figure 1 shown.

[0046] 0.5wt.% of 3-aminopropyltrimethoxysilane was dissolved in toluene organic solvent to prepare a solution with a concentration of 0.008g / mL, and then 1wt.% of polycarbosilane (PCS) was added to the solution, Prepare a mixed solution with a concentration of 0.02g / mL.

[0047] The raw material powder was added to the prepared mixed solution, sealed with high-purity argon protection, magnetically stirred for 0.4 h, and then ultrasonically treated in an ultrasonic cleaner for 0.3 h to prepare a slurry with a solid-to-liquid ratio of 2.1 g / mL.

[0048] Put the prepared slurry into a vacuum oven and dry at 60°C for 2 hours.

[0049] The dried slurry was mixed with 0.8wt.% calcium carbide (CaC 2 ) powders were put into the ball mill jar and filled wi...

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Abstract

The invention discloses a preparation method and a product of an in-situ self-generated ceramic phase reinforced titanium-based composite material. The preparation method of the in-situ self-generated ceramic phase-reinforced titanium-based composite material comprises the following steps: adding titanium powder or titanium alloy powder to a powder surface treatment agent to prepare a slurry; the surface treatment agent can make the surface of the titanium or titanium alloy powder form a One layer of organic coating layer; the dried slurry is mixed with sintering and strengthening additives by ball milling to prepare a composite powder, and the sintering and strengthening additive is calcium carbide or calcium boride; the composite powder is made into a compact After that, sintering treatment is carried out, and the product is obtained after cooling. The preparation method uses surface coating technology to control the oxygen increase in the preparation process, and at the same time uses sintering and strengthening additives to react with interstitial elements such as O and C remaining in the matrix to generate multi-level nano-ceramic particle reinforcement phases in situ to improve the mechanical properties of the material. Performance, thereby solving the technical problem of high cost existing in the preparation of titanium-based composite materials in the prior art.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a preparation method and product of an in-situ self-generated ceramic phase-reinforced titanium-based composite material. Background technique [0002] Titanium and titanium alloys are widely used in various fields such as aerospace, marine engineering, and medical materials because of their high specific strength, good thermal stability, excellent corrosion resistance, and good biocompatibility. However, with the rapid development of my country's aerospace industry in recent years, higher requirements have been put forward for structural materials in terms of light weight, high strength, heat resistance and high-efficiency forming. The performance of traditional titanium alloys under existing conditions is close to that of The limit cannot meet the more stringent requirements for the use of aerospace materials in the future. The titanium-based composite material prepar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05B22F1/02B22F3/10C22C14/00
CPCC22C1/058C22C14/00B22F3/1007B22F2999/00B22F1/16B22F2201/20
Inventor 路新潘宇李维斌杨芳曲选辉
Owner UNIV OF SCI & TECH BEIJING
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