Zr-containing TiB whisker reinforced titanium-based composite material and preparation method thereof

A titanium-based composite material and whisker technology are applied in the field of TiB whisker-reinforced titanium-based composite materials containing Zr and their preparation, which can solve the problems of stress concentration, plasticity decline, material poor plasticity and the like, and achieve low cost and improved strength. , the effect of small reduction in plasticity

Active Publication Date: 2021-11-30
XI AN JIAOTONG UNIV
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Problems solved by technology

[0004] However, in order to obtain higher strength, the previous TiB-reinforced titanium-based composites often need to introduce more TiB, which makes the plasticity of the composites drop sharply, which may be due to the fact that TiB whiskers are mostly pointed needles. It is easy to cause stress concentration, and cracks are easy to initiate and expand from these places, resulting in poor plasticity of the material

Method used

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  • Zr-containing TiB whisker reinforced titanium-based composite material and preparation method thereof
  • Zr-containing TiB whisker reinforced titanium-based composite material and preparation method thereof
  • Zr-containing TiB whisker reinforced titanium-based composite material and preparation method thereof

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preparation example Construction

[0038] A kind of preparation method of the TiB whisker reinforced titanium-based composite material containing Zr of the present invention comprises the following steps:

[0039] S1. Perform secondary ball milling and mixing of boron powder with a particle size of 1-5 μm and titanium alloy powder in an argon atmosphere, so that the titanium alloy powder is wrapped with two layers to obtain a uniformly mixed powder;

[0040] Titanium alloy powder α-type titanium alloy or nearly α-type titanium alloy powder, choose TA1 titanium alloy powder, the particle size of the powder is 95-106 μm.

[0041] S2. Ball milling and mixing the zirconium powder with a particle size of 1-5 μm and the powder A obtained in step S1 under an argon atmosphere to obtain a mixed powder;

[0042]Use a planetary ball mill, the ball milling speed is 150-200r / min, the ball milling time is 5-8h, the diameter of the balls is 1-5mm, the ball-to-material ratio is (5-8):1, and the balls are agate balls.

[0043]...

Embodiment 1

[0050] (1) Weigh 200 g of TA1 powder and B powder according to the mass ratio of 105:1 for use. The volume fraction of TiB in this embodiment is about 5.0 vol.% TiB. The boron powder has a particle size of 1 μm and a purity of 99.5%. The particle size of TA1 powder is 95 μm, and the particle size difference of TA1 powder is ≤20%.

[0051] (2) Put the powder in step (1) into four 500ml tool steel ball mill jars in proportion, put 50g powder in each jar, add 250g gram of agate balls (diameter is 1mm) in each jar , the ball-to-material ratio is 5:1). After the ball mill tank is installed, use a vacuum pump to evacuate the inside of the tank, and then introduce argon gas, repeating 3 times to ensure that the inside of the tank is protected by argon gas.

[0052] (3) Put the four ball mill jars in step (2) on the planetary ball mill, set the ball mill speed to 150r / min, the ball mill time to 8h, stop the ball mill for 10min every 30min and change direction.

[0053] (4) After th...

Embodiment 2

[0059] (1) Weigh 200 g of TA1 powder and B powder according to the mass ratio of 105:1 for use. The volume fraction of TiB in this embodiment is about 5.0 vol.% TiB. The boron powder has a particle size of 3 μm and a purity of 99.5%. The particle size of TA1 powder is 100 μm, and the particle size difference of TA1 powder is ≤20%.

[0060] (2) Put the powder in step (1) into four 500ml tool steel ball mill jars in proportion, put 50g powder in each jar, add 250g gram of agate grinding balls (diameter is 3mm) in each jar , The ball-to-material ratio is 7:1). After the ball mill tank is installed, use a vacuum pump to evacuate the inside of the tank, and then introduce argon gas, repeating 3 times to ensure that the inside of the tank is protected by argon gas.

[0061] (3) Put the four ball mill jars in step (2) on the planetary ball mill, set the ball mill speed to 180r / min, the ball mill time to 8h, stop the ball mill for 10min every 30min and change direction.

[0062] (4...

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Abstract

The invention discloses a Zr-containing TiB whisker reinforced titanium-based composite material and a preparation method thereof. The preparation method comprises the following steps of conducting ball-mill mixing on titanium alloy powder and boron powder; conducting ball milling on the obtained powder and zirconium powder to obtain mixed powder; and curing and forming the prepared mixed powder through a solid-phase sintering process, and preparing the Zr-containing TiB whisker reinforced titanium-based composite material. The process for preparing the composite material is simple, only a small amount of elements are introduced into the titanium alloy, recycling and reusing are easy, and the prepared composite material is small in plasticity reduction amplitude, even further improved in strength, good in comprehensive mechanical property, low in cost, high in economic benefit and suitable for industrial production and capable of replacing some high-performance alloy with high price in the future.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a Zr-containing TiB whisker-reinforced titanium-based composite material and a preparation method thereof. Background technique [0002] Titanium alloys are widely used in the fields of aerospace and national defense because of their advantages such as high specific strength, high thermal strength, and low density. At the same time, they also have good corrosion resistance, good biocompatibility, high toughness and no Toxic and non-magnetic are also being more and more widely used in marine ships, petrochemical and biomedical fields. However, the hardness of titanium alloy is low, and the strength and oxidation resistance will decrease sharply at high temperature, which limits the application range of titanium alloy to a certain extent. [0003] Titanium-based composites use titanium alloy as the matrix and ceramic phase or intermetallic compou...

Claims

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Application Information

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IPC IPC(8): C22C47/14C22C49/11C22C49/14C22C101/22
CPCC22C47/14C22C49/11C22C49/14
Inventor 高义民陈宇李强上官蒙蒙王怡然黄孝余肖鹏
Owner XI AN JIAOTONG UNIV
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