Microwave hot-pressing sintering and brazing device and using method thereof

Abstract

The invention relates to a microwave hot-pressing sintering and brazing device. The microwave hot-pressing sintering and brazing device comprises a microwave resonance cavity. A microwave generating device is connected to one side of the microwave resonance cavity. An adjustable total-reflection terminal device is connected to the other side of the microwave resonance cavity. A pressurization system used for applying pressure to a sample is further arranged on the microwave resonance cavity. The microwave resonance cavity of the microwave hot-pressing sintering and brazing device is of a rectangular structure of interlayer water cooling. A cooling water inlet and a cooling water outlet are formed in the outer wall of the microwave resonance cavity. The front portion, the rear portion, the upper portion and the lower portion of the microwave resonance cavity are each provided with a cylindrical attenuation waveguide which is communicated with the interior of the microwave resonance cavity and used for preventing microwave leakage. An optical fiber infrared temperature measuring sensor used for measuring thermal cycle is arranged in front of the microwave resonance cavity. The microwave hot-pressing sintering and brazing device is high in heating speed and capable of saving energy sources and achieving integration of microwave heating, pressurization and atmosphere protection.

Description

technical field [0001] The invention provides a microwave hot-press sintering and brazing device and its application method, especially the hot-press sintering and brazing of ceramics under the protection of inert gas, belonging to the technical field of mechanical equipment. Background technique [0002] Ceramic materials are hard and brittle, making them difficult to sinter and process. The traditional ceramic manufacturing industry generally has problems such as high energy consumption, heavy pollution, and low production efficiency. Microwave heating is to use the dielectric loss of materials in the microwave electromagnetic field to realize the heating of objects. This heating method has a uniform temperature field, small thermal stress, and is suitable for rapid sintering. It can also refine the grains of the sintered material, which is beneficial to the improvement of product performance. Using microwave sintering and brazing technology to replace the conventional s...

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Problems solved by technology

For ceramic materials, especially ceramic materials with very low atomic diffusion rate such as SiC, it is often necessary to apply a certain pressure during the brazing process, which is difficult to achieve in traditional microwave heating equipment.

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