Research on Ceramic/Steel Connection Using the Composite Brazing Method
Deshui Yu,
Yan Zhang,
Jianping Zhou,
Daqian Sun,
Hongmei Li
Issue:
Volume 12, Issue 3, May 2023
Pages:
36-40
Received:
17 July 2023
Accepted:
8 August 2023
Published:
22 August 2023
Abstract: Ceramic/metal connectors are widely used in aerospace, microelectronics, precision instruments, fuel cells and other fields. Ceramics' poor machinability, low ductility and impact toughness, high brittleness, and other defects severely limit their application in the wear-resistant materials industry. Due to the large difference between the coefficient of thermal expansion of ceramics and metal, the residual thermal stresses generated during the connection process will destroy the integrity of the joint, thus increasing the difficulty of connecting ceramics and metal. The composite brazing method can effectively eliminate the residual thermal stress, which is one of the ideal methods to solve the problem of ceramic-metal connection. Composite brazing will be able to regulate the thermophysical properties of the material, thus greatly reducing the damage of residual thermal stresses on the joint, and then improve the strength of the ceramic/metal joint, the method not only increases the wettability of the brazing material on the ceramic side, which is irreplaceable in improving the bonding of the joint, but also eliminates the residual thermal stresses and ensures the integrity of the joint. This paper summarizes the current research status of ceramic/steel composite brazed joints in recent years, and investigates the mechanical properties and microinterfacial structure composition of the joints.
Abstract: Ceramic/metal connectors are widely used in aerospace, microelectronics, precision instruments, fuel cells and other fields. Ceramics' poor machinability, low ductility and impact toughness, high brittleness, and other defects severely limit their application in the wear-resistant materials industry. Due to the large difference between the coeffici...
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Research on Ceramic/Steel Connection Using a Single Interlayer Method
Deshui Yu,
Yan Zhang,
Jianping Zhou,
Daqian Sun,
Hongmei Li
Issue:
Volume 12, Issue 3, May 2023
Pages:
41-45
Received:
17 July 2023
Accepted:
19 August 2023
Published:
31 August 2023
Abstract: The connection of ceramics and metals together can combine the high wear resistance and corrosion resistance of ceramics and the ductility and toughness of metals to form structural parts with metallic and non-metallic properties, and the practical application value of ceramic/metal composite structural parts is much greater than that of ceramics or metals as individual materials. Due to the large difference between the coefficient of thermal expansion of ceramics and metals, the residual thermal stresses generated during the connection will damage the integrity of the joint, and the single-layer brazing method can not only realize the connection between ceramics and metals, but also alleviate the damage to the ceramics caused by residual thermal stresses. However, most of the technologies involving such additions are still in the laboratory stage and are not yet mature. The addition of a single layer of metal can be used as a thermal stress relief layer. Types of thermal stress relief layers include monolayers, composite interlayers, porous material interlayers, gradient-structured interlayers, and composite filler metals. This study mainly summarizes the research on adding monolayer metal as thermal stress relief layer in recent years and the influence of process parameters on the thickness of reaction layer of joints, which in turn affects the mechanical properties of joints, and it is an important factor to ensure the good performance of joints.
Abstract: The connection of ceramics and metals together can combine the high wear resistance and corrosion resistance of ceramics and the ductility and toughness of metals to form structural parts with metallic and non-metallic properties, and the practical application value of ceramic/metal composite structural parts is much greater than that of ceramics o...
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