Titanium and titanium alloy particles coated with low-hardness metal on the surface and preparation method thereof

A low-hardness metal and surface coating technology, which is applied in metal processing equipment, transportation and packaging, coating, etc., can solve the problems of reducing the extension plasticity and forming ability of titanium-based composite materials, so as to avoid coarse and loose crystals and ensure Effect of improving sphericity and bonding strength

Active Publication Date: 2021-01-26
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the thermoforming process of titanium-based composites, the titanium matrix easily reacts with reinforcements such as carbon nanotubes, carbon fibers, and graphene in situ to generate a large number of titanium carbide particles, which greatly reduces the strength of titanium-based composites. Elongation plasticity and formability

Method used

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  • Titanium and titanium alloy particles coated with low-hardness metal on the surface and preparation method thereof
  • Titanium and titanium alloy particles coated with low-hardness metal on the surface and preparation method thereof
  • Titanium and titanium alloy particles coated with low-hardness metal on the surface and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In this embodiment, copper-coated CT20 titanium alloy particles are uniformly and continuously coated on the surface of CT20 titanium alloy particles to form a honeycomb core-shell structure with CT20 titanium alloy particles as the core and copper as the shell.

[0032] The preparation method of the CT20 titanium alloy particles coated with copper on the surface of the present embodiment comprises the following steps:

[0033]Step 1. Selection of raw material powder: select spherical CT20 titanium alloy powder with a particle size of 100 mesh to 150 mesh and a Mohs hardness of 6.0 as the titanium-based powder, select a particle size of 200 mesh to 300 mesh, and a Mohs hardness of 2.5. Flake copper powder with a purity of 99.95% is used as the coating powder;

[0034] Step 2, high-energy ball milling treatment: Mix 100g of the titanium-based powder selected in step 1 and 100g of the wrapped powder evenly to obtain a mixed powder, place the mixed powder in a planetary ba...

Embodiment 2

[0040] In this embodiment, nickel-coated TC4 titanium alloy particles are uniformly and continuously coated on the surface of the TC4 titanium alloy particles to form a honeycomb core-shell structure with TC4 titanium alloy particles as the core and nickel as the shell.

[0041] The preparation method of the TC4 titanium alloy particles coated with nickel on the surface of the present embodiment comprises the following steps:

[0042] Step 1. Raw material powder selection: select spherical TC4 titanium alloy powder with a particle size of 60 mesh to 100 mesh and a Mohs hardness of 6.5 as the titanium-based powder, select a particle size of 150 mesh to 200 mesh, and a Mohs hardness of 3.5. Spherical nickel powder with a purity of 99.99% is used as the coating powder;

[0043] Step 2, high-energy ball milling treatment: Mix 90g of the titanium-based powder selected in step 1 and 30g of the wrapped powder evenly to obtain a mixed powder, place the mixed powder in a planetary ball...

Embodiment 3

[0048] In this embodiment, silver-coated CT20 titanium alloy particles are uniformly and continuously coated on the surface of CT20 titanium alloy particles to form a honeycomb core-shell structure with CT20 titanium alloy particles as the core and silver as the shell.

[0049] The preparation method of the CT20 titanium alloy particles coated with silver on the surface of the present embodiment comprises the following steps:

[0050] Step 1. Raw material powder selection: Select spherical CT20 titanium alloy powder with a particle size of 60 mesh to 100 mesh and a Mohs hardness of 6.0 as the titanium-based powder, select a particle size of 150 mesh to 200 mesh, and a Mohs hardness of 2.5. Flake silver powder with a purity of 99.99% is used as the coating powder;

[0051] Step 2, high-energy ball milling treatment: mix 100g of the titanium-based powder selected in step 1 and 40g of the wrapped powder evenly to obtain a mixed powder, place the mixed powder in a planetary ball m...

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Abstract

The invention discloses titanium and titanium alloy particles whose surface is coated with low-hardness metal. The honeycomb core-shell structure of the shell; the invention also discloses a preparation method of titanium and titanium alloy particles coated with low-hardness metal on the surface. Ball milling to obtain titanium and titanium alloy particles coated with low-hardness metal. The invention enables the low-hardness metal to be uniformly and continuously coated on the surface of titanium and titanium alloy particles, avoiding the reaction between titanium and titanium alloy particles and carbon reinforcement in titanium-based composite materials and affecting the mechanical properties of titanium-based composite materials; The high-energy ball milling method is used to tightly wrap the low-hardness metal-coated metal powder on the surface of titanium and titanium alloy particles, which improves the bonding strength between the low-hardness metal shell and the inner core titanium and titanium alloy particles.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to titanium and titanium alloy particles coated with low-hardness metal on the surface and a preparation method thereof. Background technique [0002] Titanium-based composites have the comprehensive properties of titanium alloys and non-metals. Compared with traditional titanium alloys, titanium-based composites have excellent properties such as high specific strength, heat and low temperature resistance, and good corrosion resistance. They are mainly used as advanced composite materials. Gradually replace some titanium alloy materials in aerospace, petrochemical, automobile industry and other fields. At present, titanium and titanium alloy particles are the main substrates of titanium-based composites prepared by powder metallurgy, while carbon materials such as carbon nanotubes, carbon fibers, silicon carbide, and graphene are ideal reinforcements in titan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/02B22F9/04
CPCB22F9/04B22F2009/043B22F1/17
Inventor 卢金文董龙龙于佳石霍望图张于胜赵永庆张伟刘跃李亮
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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