A method for preparing high-strength and wear-resistant non-oriented graphene/Ti2AlNb composite materials

A composite material and graphene technology, applied in the field of metal material manufacturing, to achieve the effect of increasing dislocation density, reducing stress defects, reducing average friction system and wear rate

Active Publication Date: 2020-11-06
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Claims
  • Application Information

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Problems solved by technology

However, there are few reports on solid solution and aging treatment of plastically deformed composite materials.

Method used

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  • A method for preparing high-strength and wear-resistant non-oriented graphene/Ti2AlNb composite materials
  • A method for preparing high-strength and wear-resistant non-oriented graphene/Ti2AlNb composite materials
  • A method for preparing high-strength and wear-resistant non-oriented graphene/Ti2AlNb composite materials

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Experimental program
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preparation example Construction

[0031] A high-strength wear-resistant non-oriented graphene / Ti of the present invention 2 The preparation method of AlNb composite material, concrete steps are as follows:

[0032] (1) Selection of powder: Ti 2 The particle size of AlNb pre-alloyed powder is 48μm-185μm, the particle size of single-layer graphene is 0.1μm-10μm; the diameter of multi-layer graphene sheet is 5μm-10μm, and the thickness is 3nm-10nm;

[0033] (2) Ultrasonic mixing in batches: Graphene is ultrasonically dispersed in deionized water for 1 hour according to 0.0% to 2.0% of the total mass of the mixed powder; then add Ti in 3 to 5 times 2 Stir AlNb and continue to sonicate for more than 30 minutes, the total time is 3-6 hours; then dry in a vacuum drying oven at a temperature of 230°C-300°C for 10h-20h;

[0034] (3) High-energy ball milling: use stainless steel ball milling tank and balls, the ball-to-material ratio is (5-10): 1, the ball milling tank is evacuated or filled with inert gas, and 0.1%-3...

Embodiment 1

[0042] A high-strength wear-resistant non-oriented graphene / Ti 2 The preparation method of AlNb composite material is carried out according to the following steps:

[0043] (1) Selection of powder: Ti with a particle size of 48 μm to 185 μm 2 AlNb pre-alloyed powder is the matrix particle, and the added particle is multi-layer graphene, with a sheet diameter of 5 μm to 10 μm and a thickness of 3 nm to 10 nm;

[0044] (2) Ultrasonic mixing in batches: Graphene is ultrasonically dispersed in deionized water for 1 h according to 0.6% of the total mass of the mixed powder; then Ti is added in 4 times 2 Stir AlNb and continue to sonicate for 30 minutes, the total time is 3 hours; then dry in a vacuum oven at 300 ° C for 10 hours;

[0045] (3) High-energy ball milling: use stainless steel ball milling tank and balls, the ball-to-material ratio is 8:1, vacuumize the ball milling tank, add 0.5% stabilizer stearic acid at the same time, the ball milling speed is 400r / min, and the bal...

Embodiment 2

[0051] A high-strength wear-resistant non-oriented graphene / Ti 2 The preparation method of AlNb composite material is carried out according to the following steps:

[0052] (1) Selection of powder: Ti 2 The particle size of the AlNb pre-alloyed powder is 48 μm to 185 μm, the diameter of the multilayer graphene sheet is 5 μm to 10 μm, and the thickness is 3nm to 10nm;

[0053] (2) Ultrasonic mixing in batches: graphene is ultrasonically dispersed in deionized water for 1 h according to 0.2% of the total mass of the mixed powder; and then Ti is added in 3 times 2 Stir AlNb and continue to sonicate for 60 minutes, with a total time of 4 hours; then dry in a vacuum oven at 230°C for 20 hours;

[0054] (3) High-energy ball milling: use stainless steel ball milling tank and balls, the ball-to-material ratio is 10:1, vacuumize the ball milling tank, add 0.1% stabilizer stearic acid at the same time, the ball milling speed is 350r / min, and the ball milling time is 16h; After ball m...

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Abstract

A kind of high-strength wear-resistant non-oriented graphene / Ti of the present invention 2 The preparation method of AlNb composite material belongs to the fields of metal material manufacturing and powder metallurgy. The preparation method includes: (1) using Ti 2 AlNb spherical pre-alloyed powder is used as the matrix, and graphene is used as the reinforced particle filler; (2) Ultrasonically mix the selected powders in batches to a semi-solid state and dry them; (3) The dried mixed powder is mixed by high-energy ball milling; (4) Sieve the powder after dry ball milling; (5) Sieve the powder after sieving according to pure Ti 2 AlNb‑graphene / Ti 2 Sequential powdering of AlNb-graphene; (6) discharge plasma sintering to obtain a block; (7) multi-directional rolling and solid solution aging treatment of the sintered block to obtain the required material. Each component of the invention has excellent stability and reduces the risk of graphene / Ti 2 The internal structural defects caused by AlNb during the SPS process increase the dislocation entanglement inside the material, making the material's structure and mechanical properties stable and uniform in all directions. The strength and wear resistance of the material are improved, and the Ti 2 Applications of AlNb alloy in aerospace.

Description

technical field [0001] The invention belongs to the technical field of metal material manufacturing, in particular to a high-strength wear-resistant non-oriented graphene / Ti 2 Preparation method of AlNb composite material. Background technique [0002] In recent years, with the development of aerospace industry, Ti 2 AlNb has received extensive attention due to its high strength, low density, high creep resistance, and good flame retardancy. Its strength and ductility at high temperatures are also very good, but its service temperature is lower than 650 ° C. When the operating temperature is higher than 650 ° C, a single Ti 2 The strength of AlNb will not meet the market demand. Various types of reinforcing particles are added to titanium-based materials to enhance their strength and toughness. Among them, graphene has high strength and wear resistance, good thermal conductivity and large specific surface area (2630m 2 / g) has received widespread attention. [0003] Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C1/10C22C14/00C22F1/18
CPCC22C1/05C22C14/00C22F1/183
Inventor 王伟韩子茹王庆娟高原王岩王快社周海雄侯婷丽
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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