Titanium-based porous sintered composite material with nanocrystalline structure and preparation method thereof

A technology of composite materials and nanocrystals, which is applied in the field of titanium-based porous sintered composite materials and their preparation, can solve problems such as the difficulty in preparing bulk nano-metals, and achieve the effects of wide application range, high-pressure torsion speed, and simple process

Active Publication Date: 2015-09-09
福建省诺希科技园发展有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Nanomaterials can also be obtained by chemical vapor deposition, but most of them are compounds, and it is difficult to prepare bulk nanometals

Method used

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  • Titanium-based porous sintered composite material with nanocrystalline structure and preparation method thereof
  • Titanium-based porous sintered composite material with nanocrystalline structure and preparation method thereof
  • Titanium-based porous sintered composite material with nanocrystalline structure and preparation method thereof

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Embodiment 1

[0028] Example 1, Ti-5AL-1Mo-6V titanium-based porous sintered composite material with nanocrystalline structure and its preparation method

[0029] After the titanium powder, aluminum powder, molybdenum powder and vanadium powder with a purity of 99.99wt% (weight percent) are prepared in a molar ratio of 88:5:1:6, they are extruded through a mold on a press, The blank is made into a blank with a certain strength and density (relative density is about 0.81); then it is processed into a disc-shaped sample of d8mm×0.5mm after being sintered at a high temperature of 850° in a vacuum sintering furnace for 5 hours; The sample is put into the bag, and the titanium-based porous sintered composite material with nano-grain structure is obtained through high-pressure torsion and severe plastic deformation. Ti-5AL-1Mo-6V titanium-based porous sintered composites with a nanocrystalline structure of 8 mm bulk.

[0030] from image 3 It can be seen from the transmission electron microscop...

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Abstract

The invention relates to a titanium-based porous sintering composite material with nanocrystal tissues and a preparation method thereof, and belongs to the field of bulk nano material preparation. The preparation method comprises the following steps: taking titanium, aluminum, molybdenum and vanadium as base materials, preparing the components of the titanium-based composite material into blanks according to a ratio, sintering, putting the blanks into a jacket, and carrying out high-pressure torsion and severe plastic deformation to obtain the titanium-based porous sintering composite material with the nanocrystal tissues, wherein high-pressure torsion processing parameters are as follows: the rotary speed of a pressure head is 500 rpm and the downward pressing force is 1 GPa. The obtained nanocrystal tissues are smaller than 100 nm, the hardness of the obtained material is improved by 25% in comparison with that of an unprocessed sample, and the strength of the material is improved by 30% in comparison with that of the unprocessed sample; the preparation method is simple in process; the composite material can be processed on a general hydraulic machine, is easily produced in batches, can be used as a structural material in the fields of aerospace, nuclear power and the like, and has a very good practical prospect.

Description

technical field [0001] The invention relates to the technical field of nanomaterialization and composite material preparation, in particular to a titanium-based porous sintered composite material with a large volume and large block nano-grain structure and a preparation method thereof. Background technique [0002] Titanium is an important structural metal developed in the 1950s. Titanium alloys are widely used in various fields because of their high strength, good corrosion resistance, and high heat resistance. Titanium-based alloys and composite materials can be made by adding other elements to titanium metal. [0003] At present, high-strength titanium-based composite materials have been further developed. Titanium-based composites are mainly used to make aircraft engine compressor components, followed by structural parts of rockets, missiles and high-speed aircraft, and spacecraft. As aerospace structural materials, higher requirements are placed on the strength of tita...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/08C22C14/00
Inventor 徐淑波李振东赵中魁任国成林晓娟
Owner 福建省诺希科技园发展有限公司
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