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Preparation method of in-situ synthesized ceramic phase reinforced titanium matrix composite and product

A titanium-based composite material, in-situ self-generated technology, applied in the field of powder metallurgy, can solve the problem of high cost, achieve the effects of reducing process cost, improving operability, and ensuring strength and plasticity

Active Publication Date: 2019-07-05
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 of in-situ synthesized ceramic phase reinforced titanium matrix composite and product
  • Preparation method of in-situ synthesized ceramic phase reinforced titanium matrix composite and product

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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 of an in-situ synthesized ceramic phase reinforced titanium matrix composite and a product. The preparation method of the in-situ synthesized ceramic phasereinforced titanium matrix composite includes the following steps that titanium powder or titanium alloy powder is added into powder surface treating agents to prepare slurry; the surface treating agents can make the surface of titanium or the titanium alloy powder form an organic coating layer; composite powder is prepared by ball milling and powder mixing of the dried slurry with sintering andstrengthening additives, and the sintering and strengthening additives are calcium carbides or calcium borides; and after the composite powder is made into a blank, sintering treatment is carried out,and the product is prepared after cooling. According to the preparation method, oxygen increase in the preparation process is controlled by the surface coating technology, meanwhile the sintering andstrengthening additives are utilized to react with O, C and other interstitial elements remaining in a matrix, a multistage nano ceramic particle reinforcement phase is generated in situ, the mechanical properties of materials are improved, and thus the technical problem of high cost in preparation of a titanium matrix composite in the prior art is solved.

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 Applications(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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