Shanghai Haoyue Technology Co., Ltd.  

Product Name: Application of Hot Press Furnace - metal/Ceramic -Diffusion Bonding Certification: ISO Type: Ceramic Heating Equipment Trademark: HAOYUE Origin: Shanghai, China HS Code: 8514109000 Product Description Although special ceramic materials have excellent insulation (most ceramics), high temperature resistance, corrosion resistance and wear resistance, their brittleness is large, and the processing performance is very poor. It is difficult to prepare large or complex structural parts. metal materials have excellent room temperature strength, toughness, electrical conductivity and thermal conductivity, which form an obvious complementary relationship with ceramic materials. Using the connection technology to combine the two materials reliably, we can make full use of their excellent performance to manufacture complex components that meet the requirements.Due to the fundamental difference of chemical bond structure between ceramic materials and metal materials, and the special physical and chemical properties of ceramics, there are many problems in the connection between ceramics and metals. It is mainly reflected in the following two problems: first, ceramic materials are mainly composed of ionic bonds and covalent bonds, while metal materials are mainly composed of metal bonds, which are almost non wetting. Therefore, it is necessary to consider the wettability of ceramics and metal materials. Second, the linear expansion coefficients of the two materials are generally quite different. When heat sealing or mechanical connection is used, the joint of ceramic and metal is at the joint There will be large residual stress, which will weaken the mechanical properties of the joint and even cause the joint to be damaged and cracked. Therefore, it is necessary to consider the thermal stress relief at the junction.The common connection method is using brazing process, using the metal or amorphous material with melting point lower than the material to be welded as filler metal, heating to lower than the melting point of the base metal of the weldment and higher than the melting point of the filler metal. The melted filler metal is used to wet the base metal and fill the weld to realize the mutual connection of the welded materials.Solid phase diffusion bonding (SDL) is one of the most widely studied high temperature resistant ceramic / metal bonding methods. Its working principle is that two same or different materials are in close contact under high temperature and certain pressure, plastic deformation occurs on the surface, and atoms diffuse each other to form a good jointThe advantages of this process are that the joint quality is stable, the connection strength is high, the joint with large cross-section can be welded, multiple joints can be welded at one time, the intermediate layer can be added, and the surface metallization of ceramic materials is not required. However, the process is complex and can meet the application requirements under high temperature and corrosion resistance conditions. It has high requirements for the connection surface state and connection equipment.Customer laboratory equipment:P2 Multifunctional furnace of vacuum hot press sinteringExperimental steps:1.Vacuum pumping (to 10-2Pa);2.Heating up (heating to 1250 ºC, heating rate 15 ºC / min);3.Heat preservation at 1250 ºC for 100 min (1 h, 40 min);4.At 1250 ºC for 15min, 6T (pressure) was applied, and the process lasted for 60min (1250 ºC);5.The pressure was maintained for 15 minutes after the completion of 6T force application (the temperature was still 1250 ºC);6.Unloading pressure, 10 min pressure unloading to 0 (temperature is still 1250 ºC);7.After the pressure unloading is completed, the furnace will automatically cool down from 1250 ºC to room temperature.Experimental AtlasThe vacuum hot pressing sintering furnace perfectly meets the customer's experimental process requirements. The side door structure is very suitable for large-scale mold loading and unloading, and the operation is convenient. In the process of experiment, the pressure and displacement control is accurate and high precision, which ensures the compaction precision of diffusion bonding process. The temperature uniformity of the whole working area is good, the quality of pressed products is high, and the metal substrate has no overheating and melting phenomenon.Haoyue technology is a high-tech enterprise integrating R & D, production and sales of electric furnace. The company has been focusing on semiconductor materials, carbon materials, advanced ceramics and composite materials, lithium battery and new energy material equipment four major fields, has rich industry experience and professional technology, wholeheartedly serves customers and provides perfect integrated industrial solutions.