Normal-temperature plasma auxiliary sintering device

Abstract

The utility model discloses a normal-temperature plasma auxiliary sintering device which is characterized in that two separated electrodes, namely an upper electrode and a lower electrode, are fixed on a bracket, and a material to be treated is arranged between the upper electrode and the lower electrode; the power supply is respectively connected with the upper electrode and the lower electrode for supplying power; the current loop is provided with an ampere meter and a voltmeter; an infrared camera is arranged on one side of the to-be-processed material; and the ampere meter, the voltmeter and the thermal infrared imager are all connected to a data acquisition and control system. The device has a simple structure, is convenient and quick to use, effectively reduces the energy consumption and the requirements on equipment, and can greatly reduce the process cost.

Description

Technical Field

[0001] The utility model belongs to a material sintering device, in particular to a normal temperature plasma assisted sintering device. Background Art

[0002] Material sintering equipment typically uses radiation heating to heat the sample, promoting diffusion and achieving densification by eliminating pores. The most common method of radiation heating is through the combustion of coal and natural gas. Currently, resistance heating is increasingly used in industry due to its cleaner and more environmentally friendly properties. Furthermore, for some specialized material systems, sintering can be achieved through electromagnetic induction heating, microwave heating, and laser heating. Research on using plasma as a heat source for sintering materials has also attracted considerable attention. Spark plasma sintering (SPS) aims to generate plasma particles within powders using a pulsed DC electric field, cleaning and activating the powder surface and thus improving sintering efficiency. However, extensive research has shown that SPS struggles to generate plasma. Plasma melting, spraying, and welding typically require expensive inert gases as the ionization medium. Stable plasma formation requires high voltages and currents, resulting in high power consumption, high energy consumption, and low efficiency. Furthermore, these plasma jets heat up too quickly and have a strong scouring effect, making them unsuitable for sintering powder materials. Utility Model Content

[0003] The purpose of the utility model is to provide a room temperature plasma assisted sintering device which is simple in structure, convenient, fast and easy to implement.

[0004] The utility model provides a room-temperature plasma-assisted sintering device, in which two separated electrodes, namely an upper electrode and a lower electrode, are fixed on a bracket, and a material to be processed is placed between the upper electrode and the lower electrode; a power supply is connected to the upper electrode and the lower electrode respectively to supply power thereto, and a complete current loop is formed, which can generate plasma at room temperature, and an ammeter and a voltmeter are provided on the current loop; an infrared camera is provided on one side of the material to be processed; the ammeter, the voltmeter and the infrared thermal imager are all connected to a data acquisition and control system.

[0005] Furthermore, the upper electrode is fixed on the bracket via a linear motor, and the upper electrode can move freely up and down along the bracket.

[0006] Furthermore, the upper electrode and the lower electrode are made of fiber felt or needle tip arrays made of carbon material.

[0007] Furthermore, the upper electrode and the lower electrode are made of fiber felt or needle tip arrays made of pure metals or alloys of W, Mo, Ta, Nb, Ni, Co, and Pt that are resistant to high temperature and ablation and have good conductivity.

[0008] Further, the upper electrode and the lower electrode are made of fiber felt or needle tip array made of WC, TiC, NbC, Cr3C2, Mo2C, VC, ZrC, SiC ceramics with high temperature resistance, ablation resistance and good electrical conductivity.

[0009] Further, the working voltage of the power supply is 0V to 1000V.

[0010] Further, the power supply is a DC power supply or an AC power supply.

[0011] The beneficial technical effects of the present utility model are as follows:

[0012] (1) The present utility model can generate stable plasma in the air at a lower voltage through the fiber felt or the needle tip array;

[0013] (2) The present utility model does not need to use expensive inert gases, nor does it need a low vacuum environment, which can greatly reduce the process cost;

[0014] (3) The present utility model designs a complete current loop, so that the plasma and the current can flow through the material to be processed at the same time;

[0015] (4) The structure of the present utility model is simple, easy to use, fast, and effectively reduces energy consumption and requirements for equipment. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of the room temperature plasma-assisted sintering device of the present utility model.

[0017] In the figure: 1 - bracket, 2 - linear motor, 3 - infrared camera, 4 - power supply, 5 - data acquisition and control system, 6 - material to be processed, 7 - lower electrode, 8 - upper electrode, 9 - ammeter, 10 - voltmeter. Detailed Embodiments

[0018] The following further describes the present utility model in detail with reference to the drawings and specific implementation methods.

[0019] A room temperature plasma-assisted sintering device of the present utility model fixes two separated electrodes, namely an upper electrode 8 and a lower electrode 7, on a bracket 1, and a material to be processed 6 is between the upper electrode 8 and the lower electrode 7; a power supply 4 is respectively connected to the upper electrode 8 and the lower electrode 7 to supply power to them, and an ammeter 9 and a voltmeter 10 are arranged on the current loop; an infrared camera 3 is arranged on one side of the material to be processed 6; the ammeter 9, the voltmeter 10 and the infrared thermal imager 3 are all connected to the data acquisition and control system 5.

[0020] Furthermore, the upper electrode 8 is fixed on the bracket 1 by the linear motor 2, and the upper electrode 8 can move freely up and down along the bracket 1 to adjust the distance between the lower electrode 7 and the upper electrode 8, thereby adjusting the action area, intensity and distribution characteristics of the plasma, as well as the contact state with the material to be processed.

[0021] Furthermore, the materials of the upper electrode 8 and the lower electrode 7 are fiber felts or tip arrays made of carbon materials.

[0022] Furthermore, the materials of the upper electrode 8 and the lower electrode 7 are fiber felts or tip arrays made of pure metals or alloys of W, Mo, Ta, Nb, Ni, Co, Pt that are resistant to high temperature and ablation and have good electrical conductivity.

[0023] Furthermore, the materials of the upper electrode 8 and the lower electrode 7 are fiber felts or tip arrays made of WC, TiC, NbC, Cr3C2, Mo2C, VC, ZrC, SiC ceramics that are resistant to high temperature and ablation and have good electrical conductivity.

[0024] Furthermore, the working voltage of the power supply 4 is 0V to 1000V.

[0025] Furthermore, the power supply 4 is a DC power supply or an AC power supply, which can provide a stable and continuous voltage or current output and has two modes of constant voltage output and constant current output that can be freely switched.

Claims

1. A room temperature plasma-assisted sintering device, characterized in that, Two separate electrodes, namely the upper electrode (8) and the lower electrode (7), are fixed on the bracket (1), and the material to be processed (6) is located between the upper electrode (8) and the lower electrode (7); the power supply (4) is respectively connected to the upper electrode (8) and the lower electrode (7) to supply power to them, and a complete current loop is formed, which can generate plasma at room temperature. An ammeter (9) and a voltmeter (10) are arranged on the current loop; an infrared camera (3) is arranged on one side of the material to be processed (6); the ammeter (9), the voltmeter (10) and the infrared thermal imager (3) are all connected to the data acquisition and control system (5).

2. The ambient temperature plasma-assisted sintering device according to claim 1, wherein The upper electrode (8) is fixed on the bracket (1) by a linear motor (2), and the upper electrode (8) can move freely up and down along the bracket (1).

3. The room-temperature plasma-assisted sintering device according to claim 1, wherein The materials of the upper electrode (8) and the lower electrode (7) are fiber felts or tip arrays made of carbon materials.

4. A room-temperature plasma-assisted sintering device according to claim 1, characterized in that, The materials of the upper electrode (8) and the lower electrode (7) are fiber felts or tip arrays made of pure metals or alloys of W, Mo, Ta, Nb, Ni, Co, Pt, which are resistant to high temperature and ablation and have good electrical conductivity.

5. A room-temperature plasma-assisted sintering device according to claim 1, characterized in that, The materials of the upper electrode (8) and the lower electrode (7) are fiber felts or tip arrays made of WC, TiC, NbC, Cr3C2, Mo2C, VC, ZrC, SiC ceramics, which are resistant to high temperature and ablation and have good electrical conductivity.

6. The room-temperature plasma-assisted sintering device according to claim 1, characterized in that, The working voltage of the power supply (4) is 0V to 1000V.

7. A room-temperature plasma-assisted sintering device according to claim 1, characterized in that, The power supply (4) is a DC power supply or an AC power supply.

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