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Refrigerating device and method for preparing high-strength-and-toughness layered porous titanium alloy material through refrigerating device

A freezing device and high-strength technology, applied in the field of materials, can solve problems such as inability to remove, plastic toughness decline, etc., and achieve the effects of controllable cooling temperature, large pore size selectivity, and low cost

Active Publication Date: 2021-03-26
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, a layer of oxygen atoms will be inherently adsorbed around the powder particles, which cannot be removed.
Causes a very serious decline in the ductility and toughness of the sintered product

Method used

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  • Refrigerating device and method for preparing high-strength-and-toughness layered porous titanium alloy material through refrigerating device
  • Refrigerating device and method for preparing high-strength-and-toughness layered porous titanium alloy material through refrigerating device
  • Refrigerating device and method for preparing high-strength-and-toughness layered porous titanium alloy material through refrigerating device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 As shown, the present embodiment provides a freezing device, including a mold 1, a metal sheet 2, a semiconductor refrigeration sheet group 3, a heat-sensitive semiconductor 4, a temperature controller 5, a power supply 6, a metal hollow plate 7, a cooling pipeline 8, a cooling Liquid storage unit 9 and cooling and power unit 10 .

[0029] The mold 1 is a frame body with a circle of closed side walls, without a bottom surface penetrating up and down, and can be in any shape such as a ring.

[0030]The mold 1 is placed on the thin metal sheet 2, and the thin metal sheet 2 is fixed on the semiconductor refrigeration sheet group 3. Wherein, the mold 1 can be pasted on the metal sheet 2 by sealing grease, so as to avoid slurry leakage, and it is sufficient to separate the mold 1 from the metal sheet 2 when demoulding.

[0031] The semiconductor refrigerating sheet group 3 is connected to the power supply 6, and the power supply 6 supplies power to the sem...

Embodiment 2

[0039] This embodiment provides a method for preparing a high-strength and tough layered porous titanium alloy material, comprising the following steps:

[0040] Step 1: Prepare the bonding thickener, powder and deionized water into a mixed slurry. Among them, the bonding thickener includes Sanxian gum and polyvinyl alcohol, and the powder includes TiH 2 , B 4 C. Low melting point liquid transmission medium. The low-melting point liquid transmission medium is a low-melting point metal (such as Al, Ni) or a low-melting point glass additive (such as Al 2 o 3 -SiO 2 ). Low melting point means that it is alloyed with other powders to form a low melting point mixed slurry, which reduces the sintering temperature.

[0041] Specifically, a sanxian gum solution in which the sanxian gum accounts for 0.4% (vol%) of deionized water is prepared. Mix TiH2, B4C and Al evenly and add it into the Sanxian gum solution, wherein, TiH 2 , B 4 The mass ratio of C and Al is 100:1.5:6, the ...

Embodiment 3

[0048] This embodiment provides a method for preparing a high-strength and tough layered porous titanium alloy material, comprising the following steps:

[0049] Step 1. Specifically, prepare a sanxian gum solution with a deionized water content of 0.1% (vol%). TiH 2 , B 4 After C, Al are mixed evenly, add in the Sanxian glue solution, wherein, TiH 2 , B 4 The mass ratio of C and Al is 100:1.5:6, the particle size is 1 μm, and the volume of the powder accounts for 30% of the volume of the mixed slurry. At the same time, polyvinyl alcohol with a mass of 1% of the total mass of the powder was added, uniformly mixed by ball milling, the balls were zirconia balls, and ball milling was carried out for 8 hours. De-bubble.

[0050] Step 2. Specifically, place the PTFE mold of the freezing device in Example 1 on the copper sheet, slowly pour the slurry, adjust the cooling rate to 10°C / min, and the cooling temperature to -30°C, and freeze until the surface is completely frozen . ...

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Abstract

The invention discloses a refrigerating device and a method for preparing a high-strength-and-toughness layered porous titanium alloy material through the refrigerating device. The refrigerating device comprises a mold, a metal sheet, a semiconductor chilling plate set, a thermosensitive semiconductor, a temperature controller, a power source, a metal hollow plate, a cooling pipeline, a cooling liquid storage unit and a cooling and power unit; the mold is arranged on the metal sheet; the metal sheet is fixed on the semiconductor chilling plate set; the semiconductor chilling plate set is connected with the power supply; the thermosensitive semiconductor is fixed at the bottom of the mold; the temperature controller is connected with the thermosensitive semiconductor to monitor the temperature at the bottom of the mold; the temperature controller is also connected with the power supply and controls the semiconductor chilling plate set by adjusting the output of the power supply; the semiconductor chilling plate set is fixed on the metal hollow plate; the cooling liquid storage unit is communicated with the metal hollow plate through the cooling pipeline; and the cooling and power unit is used for cooling and conveying cooling liquid. The refrigerating device and the method for preparing the high-strength-and-toughness layered porous titanium alloy material through the refrigerating device have the advantages of adjustable material structure, simple preparation, low cost and the like.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a method for preparing a layered porous titanium alloy material, in particular to a freezing device and a method for preparing a layered porous titanium alloy material with high strength and toughness. Background technique [0002] Metallic porous material is a kind of structure-function integrated material that contains the combination of internal pores and skeleton features. It has the excellent characteristics of high strength, high toughness, good thermal conductivity, high temperature resistance, corrosion resistance, weldability and easy processing of metal materials. At the same time, its internal pore structure characteristics give it special characteristics, such as penetration capacity, adsorption capacity, buffer capacity etc. Widely used in biomedicine, catalytic batteries, sound absorption and noise reduction, filtration and other industries. With the development of society ...

Claims

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Application Information

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IPC IPC(8): C22C1/08B22F3/11B22F9/20B22F5/00C22C14/00F25B21/02
CPCC22C1/08B22F3/1125B22F9/20C22C14/00B22F5/00F25B21/02F25B2321/0212C22C1/086
Inventor 姚正军杜文博张莎莎束长青章旗超张帆李祥硕姚孟欣
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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