Dynamic pressure electric pulse double-field control sintering furnace and sintering method

Abstract

The invention relates to a dynamic pressure electric pulse double-field control sintering furnace and a sintering method. The sintering furnace comprises a furnace body, a dynamic pressure system, a pulse current generator and a sintering controller. The furnace body is connected with the dynamic pressure system and the pulse current generator. The dynamic pressure system and the pulse current generator are both connected to the sintering controller. A die is arranged in the furnace body. The dynamic pressure system comprises an upper press head electrode, a lower press head electrode, an upper press head, a lower press head, a constant pressure control module, a dynamic pressure control module and a pressure master control module. The dynamic pressure system is connected with the sintering controller. The pulse current generator is connected with the upper press head electrode and the lower press head electrode and connected with the sintering controller as well. The sintering controller controls the dynamic pressure system and the pulse current generator to generate the adjustable dynamic pressure for a material to be sintered and conduct plasma pulse current sintering on the material to be sintered. The dynamic pressure electric pulse double-field control sintering furnace and the sintering method can be widely applied to sintering of the high-performance material.

Description

technical field [0001] The invention relates to a sintering furnace and a sintering method, in particular to a dynamic pressure electric pulse double field control sintering furnace and a sintering method. Background technique [0002] The sintering process in the preparation of advanced materials is a critical step to achieve particle densification and endow materials with mechanical strength. Ceramics and some metal materials have high melting points, and it is often difficult to achieve sintering densification, so higher requirements are put forward for sintering equipment and technology. [0003] Currently commonly used sintering methods include atmospheric pressure sintering, hot pressing sintering and spark plasma sintering. Atmospheric pressure sintering is a simple high-temperature sintering method, which promotes the densification of materials by heating under atmospheric pressure, and the degree of densification of materials is not high. Hot press sintering is to...

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Problems solved by technology

[0004] In view of the above problems, the object of the present invention is to provide a method that can effectively improve the inhomogeneity of electric field and temperature field in spark plasma sintering, so that the electric field and dynamic pressure field are in controllable changes, reducing and eliminating "hard agglomeration" , to achieve rapid densification of materials at lower temperatures, increase powder bulk density, and promote pore discharge, thereby preparing high-density, low-defect, high-strength and other high-quality performance materials. Dynamic pressure electric pulse double field control sintering furnace and sintering method

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