High-frequency pulse discharge sintering system
A high-frequency pulse discharge and high-frequency discharge technology, applied in the direction of discharge heating, electric furnace heating, electrical components, etc., can solve the problems of difficult to meet the actual needs of the industry, small material size, etc., to reduce the Joule heating effect and avoid the grain size. The effect of growth and improvement of dislocation mobility
Inactive Publication Date: 2019-04-19
TAIYUAN UNIV OF TECH
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Problems solved by technology
However, the size of the material prepared by SPS sintering is small, which is difficult to meet the actual needs of the industry.
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[0026] The present invention will be further described below in conjunction with specific examples.
[0027] A high-frequency pulse discharge sintering system, comprising a high-frequency discharge sintering furnace 29, an electric control box 27 and a high-frequency pulse power supply 40 connected to each other through wires;
[0028] The high-frequency discharge sintering furnace 29 includes a top base 10, a base 1 and a vacuum furnace chamber 20 between the top base 10 and the base 1, the top of the top base 10 is connected with a pressure motor 11, and the vacuum furnace chamber 20 An upper electrode plate 9 and a lower electrode plate 2 are arranged opposite to each other on the top and the bottom of the interior, and the middle lower part of the upper electrode plate 9 and the middle upper part of the lower electrode plate 2 are respectively vertically connected with an upper electrode 8 and a lower electrode 3, The lower end of the upper electrode 8 and the upper end of...
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Abstract
The invention relates to a high-frequency pulse discharge sintering system, and belongs to the technical field of hard material and composite material preparing. The high-frequency pulse discharge sintering system comprises a high-frequency discharge sintering furnace, an electric control box and a high-frequency pulse power source, all of which are connected together through a wire. The high-frequency discharge sintering furnace comprises a top base, a bottom base and a vacuum furnace cavity located between the top base and the bottom base. The high-frequency pulse power source comprises three parts including an alternating-current transformer, an alternating current and direct current converter and a direct current voltage regulator. The positive output end and the negative output end ofthe power source are connected to the two ends of an electrode of the high-frequency pulse discharge sintering furnace correspondingly. Under the high-frequency pulse current, the skin effect, the proximity effect, the dielectric effect, the discharge effect and other effects can be comprehensively utilized, and high-quality and high-efficiency connection between micro-nano particle components isenhanced. Through periodic powering-on and powering-off of high-frequency pulse current, the Joule heat effect can be effectively reduced, grain growth is avoided, the force action can be generated to dislocation through the electric pulse, dislocation mobility is improved, and recrystallization is promoted. Cracks and other defects in materials are effectively healed, and interior-compact materials excellent in performance are prepared.
Description
technical field [0001] The invention relates to a high-frequency pulse discharge sintering system, which belongs to the technical field of preparation of hard materials and composite materials. Background technique [0002] As an extreme non-equilibrium process, pulse current treatment can input electrical energy, thermal energy, and strain energy into materials in a very short time, thereby affecting material recovery, recrystallization, phase transition, grain refinement, and amorphous nanoscale. Behaviors such as crystallization are effective methods to improve the structure and properties of materials. Therefore, pulsed current plays an increasingly important role in the process of material preparation, processing, shaping and use. [0003] At this stage, spark plasma sintering (SPS), as an advanced powder metallurgy technology, has been widely used in the preparation of metals, ceramics and composite materials, especially in the field of nanocomposites. Its working pr...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F27D11/10F27D7/06F27D9/00F27D19/00H05B7/06H05B7/144B22F3/105
CPCB22F3/105F27D7/06F27D9/00F27D11/10F27D19/00F27D2007/066F27D2009/0002F27D2009/0013F27D2019/0003F27D2019/0028H05B7/06H05B7/144Y02P10/25
Inventor 王文先刘瑞峰陈洪胜张婷婷万世鹏
Owner TAIYUAN UNIV OF TECH