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A hollow pipe forming method based on particle size distribution of titanium diboride and titanium gradient composite materials

A technology of titanium diboride and composite materials, which is applied in the directions of transportation and packaging, metal processing equipment, etc., can solve the problems of difficult layering to form a component gradient, low preparation efficiency, poor density, etc. Uniform and dense effect with low production cost

Active Publication Date: 2021-01-19
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantage is that it cannot prepare ceramic gradient materials with high melting point, and there must be a density difference between the two components.
TiB 2 - Ti gradient material with high melting point, TiB 2 The densities of the two substances, Ti and Ti, are similar, and it is not easy to stratify to form a component gradient under the action of centrifugal force. The preparation method is low-cost and high-efficiency.

Method used

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  • A hollow pipe forming method based on particle size distribution of titanium diboride and titanium gradient composite materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The invention provides a TiB 2 -Ti functionally graded material, the graded material has five layers in total, and the raw material of each layer is TiB 2 Vary with Ti content, Ti content in increments of 10wt%, the rest is TiB 2 , and the sum of the mass percentages of the two components is 100% (30%Ti-70%TiB 2 , 40%Ti-60%TiB 2 , 50%Ti-50%TiB 2 , 60%Ti-40%TiB 2 , 70%Ti-30%TiB 2 ).

[0027] (1) First, D50 5.0μmTiB 2 Powder, D50 1.0μm Ti powder Weigh an appropriate amount of TiB according to the designed composition of each layer 2 and Ti powder into a mixing tank, add solvent absolute ethanol and dispersant polyvinyl butyral, seal the mixing tank and put it into a drum mixer to rotate and mix for 6 hours at a rotation speed of 60rpm to prepare different slurries of ingredients;

[0028] (2) The first layer of slurry (30%Ti-70%TiB 2 ) into the spraying machine, adjust the pressure of the spraying machine, extend the nozzle into the electric spindle centrifuge, ...

Embodiment 2

[0033] The invention provides a TiB 2 -Ti functionally graded material, the gradient material has six layers, and the raw material of each layer is TiB 2 Varies with Ti content, Ti content in increments of 20wt%, the rest is TiB 2 , and the sum of the mass percentages of the two components is 100% (0%Ti-100%TiB 2 , 20%Ti-80%TiB 2 , 40%Ti-60%TiB 2 , 60%Ti-40%TiB 2 , 80%Ti-20%TiB 2 , 100%Ti-0%TiB 2 ).

[0034] (1) First, D50 30.0μmTiB 2 Powder, D50 6.0μmTi powder Weigh an appropriate amount of TiB according to the designed composition of each layer 2 and Ti powder into a mixing tank, add solvent water and dispersant polyvinyl butyral, seal the mixing tank and put it into a drum mixer to rotate and mix for 6 hours at a rotation speed of 60rpm to prepare different ingredients. slurry;

[0035] (2) The first layer of slurry (0%Ti-100%TiB 2 ) into the spraying machine, adjust the pressure of the spraying machine, extend the nozzle into the electric spindle centrifuge, the...

Embodiment 3

[0040] The invention provides a TiB 2 -Ti functionally graded material, the gradient material has nine layers in total, and the raw material of each layer is TiB 2 Vary with Ti content, Ti content in increments of 10wt%, the rest is TiB2 , and the sum of the mass percentages of the two components is 100% (10%Ti-90%TiB 2 , 20%Ti-80%TiB 2 , 30%Ti-70%TiB 2 , 40%Ti-60%TiB 2 , 50%Ti-50%TiB 2 , 60%Ti-40%TiB 2 , 70%Ti-30%TiB 2 , 80%Ti-20%TiB 2 , 90%Ti-10%TiB 2 ).

[0041] (1) First, D50 50.0μmTiB 2 Powder, D50 10.0μm Ti powder Weigh an appropriate amount of TiB according to the designed composition of each layer 2 and Ti powder into a mixing tank, add solvent absolute ethanol and dispersant polyvinyl butyral, seal the mixing tank and put it into a drum mixer to rotate and mix for 6 hours at a rotation speed of 60rpm to prepare different slurries of ingredients;

[0042] (2) The first layer of slurry (10%Ti-90%TiB 2 ) into the spraying machine, adjust the pressure of the ...

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Abstract

The invention discloses a hollow pipe forming method based on particle size distribution of titanium diboride and titanium gradient composite materials, which comprises the following steps: TiB with different particle sizes 2 Mix ceramic powder and Ti metal powder; mix the ceramic powder and metal powder obtained by particle size grading with solvent and dispersant to form a uniform slurry; put the slurry into the spraying machine, and extend the nozzle into the centrifuge On the substrate, adjust the pressure of the spraying machine, and move the position of the nozzle from top to bottom and bottom to top, so that the slurry can be evenly sprayed on the inner wall of the substrate; change the TiB 2 The relative weight percentage of ceramic powder and Ti metal powder, prepare the slurry again, and spray the slurry again with a spraying machine to form the second layer of composite material layer; repeat the steps to form multi-layer spraying, and accumulate to form a green body; sintering The green body is taken out from the base plate to obtain the hollow pipe. The process of the invention is simple, greatly improves the preparation efficiency of the gradient thin-walled pipe fittings, and the green body is dense and uniform.

Description

technical field [0001] The present invention relates to the field of cermet gradient composite materials, more specifically, the present invention relates to a TiB based on particle size distribution 2 - A method for forming a hollow pipe of a Ti gradient composite material. Background technique [0002] Functional Graded Material (FGM) is a combination of two or more raw materials with different properties, through the use of different composite technologies to control the shape and combination of microscopic elements (including composition, structure and voids) inside the material. A non-uniform composite material that exhibits a continuous gradient change in a specific direction, so that the macroscopic properties of the material also present a continuous gradient change in the same direction. FGM is a functional material that integrates the best advantages of various single phases (metals, ceramics, polymers, etc.), and has specific properties that traditional composite...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F7/02B22F5/12B22F1/00B22F3/22B22F3/10
CPCB22F3/10B22F3/22B22F5/106B22F7/02B22F2998/10B22F1/052
Inventor 张金咏韩兵雷丽文张帆傅正义王为民
Owner WUHAN UNIV OF TECH