Research on Diffusion Welding Connection of Steel/Ceramics
Yuqiang Liu,
Yan Zhang,
Jianping Zhou,
Daqian Sun,
Hongmei Li
Issue:
Volume 7, Issue 3, September 2023
Pages:
22-26
Received:
17 July 2023
Accepted:
3 August 2023
Published:
22 August 2023
Abstract: Ceramics have been widely used in engineering applications due to their excellent hardness and wear resistance. Connecting ceramics and metals into composite parts and applying them to high temperature and corrosive use bar environments not only allows for normal use in harsh environments, but also improves the service life of the materials. The connection of ceramic and metal due to the large difference in the coefficient of thermal expansion between the dissimilar materials, will produce large residual thermal stress, thus hindering the further development of ceramic/metal dissimilar materials connection. At present, diffusion welding can not only realize the connection between them, but also can effectively alleviate the residual thermal stress between ceramics and metals due to the large difference in the coefficient of thermal expansion, which has a great protective effect on ceramics, and protects the integrity of the dissimilar materials connectors. Therefore, diffusion welding is used for the connection of ceramics and metals. This paper reviews the research progress in the realization of ceramic/metal composite parts using solid-phase diffusion welding, liquid-phase diffusion welding and partially transient liquid-phase diffusion welding, and analyzes the microstructure and mechanical properties of the interface. Finally, the advantages and disadvantages of solid-phase diffusion welding, liquid-phase diffusion welding and partially transient liquid-phase diffusion welding are briefly analyzed.
Abstract: Ceramics have been widely used in engineering applications due to their excellent hardness and wear resistance. Connecting ceramics and metals into composite parts and applying them to high temperature and corrosive use bar environments not only allows for normal use in harsh environments, but also improves the service life of the materials. The co...
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Research on Fusion Brazing Welding of Steel/Ceramic Connections
Deshui Yu,
Yan Zhang,
Jianping Zhou,
Daqian Sun,
Hongmei Li
Issue:
Volume 7, Issue 3, September 2023
Pages:
27-30
Received:
17 July 2023
Accepted:
10 August 2023
Published:
22 August 2023
Abstract: Ceramic/metal joints combine the high wear resistance of ceramics with the good ductility of metals to meet the conditions of use in harsh environments, avoiding the drawbacks of individual materials, and are used in a wide range of mechanical and heavy engineering applications such as aerospace, military instrumentation and nuclear energy. Due to the large difference between the density, specific heat capacity and coefficient of thermal expansion of ceramics and metals and other thermophysical properties, the residual thermal stresses generated during the connection will cause damage to the joints, which makes it difficult to realize the connection between ceramics and metals. Fusion brazing can alleviate the defects caused by the differences in thermophysical properties, and is an important method for the preparation of ceramic/metal composites. A molten liquid metal is used to wet the ceramic/metal surface and undergo a metallurgical reaction. Brazed connections are made at low temperatures, the base material does not melt during the brazing process, and there is minimal effect on the structure and properties of the base material. Therefore, hard brazing has been the main method of joining different materials for many years. This paper reviews the application of melt brazing in ceramic/metal joints in recent years and analyzes the structure, mechanical properties and constituent parts of the ceramic/metal interface.
Abstract: Ceramic/metal joints combine the high wear resistance of ceramics with the good ductility of metals to meet the conditions of use in harsh environments, avoiding the drawbacks of individual materials, and are used in a wide range of mechanical and heavy engineering applications such as aerospace, military instrumentation and nuclear energy. Due to ...
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