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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2022, Vol. 43 ›› Issue (4): 525001-525001.doi: 10.7527/S1000-6893.2021.25001

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Research progress on wetting behaviors of brazed alloy/ceramic systems

FU Wei1,2, FAN Zhenxing1, SONG Xiaoguo1,2, BIAN Hong1,2, HU Shengpeng1,2, LEI Yuzhen1,2   

  1. 1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;
    2. School of Materials Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, China
  • Received:2020-11-23 Revised:2021-02-02 Published:2021-03-09
  • Supported by:
    National Natural Science Foundation of China (51905125, 51775138, U1737205); Taishan Scholars Foundation of Shandong Province (tsqn201812128); Key Research & Development Program of Shandong Province (2019GHY112069)

Abstract: Investigation of the wetting behaviors of the brazed alloy/ceramic system is instructional for the brazing of ceramics. At present, the wetting test is usually conducted in the vacuum furnace. Except the conventional sessile drop method, the modified sessile drop method, dispensed drop method and transferred drop method are developed to acquire more accurate parameters. The wetting of brazing alloy on the ceramic surface involves dissolution, diffusion, interfacial adsorption and reaction, etc., and is a complex physical and chemical phenomenon. According to the nature of driving wetting, the wetting mechanisms can be divided into three types:dissolution-driving wetting, adsorption-driving wetting, and interfacial reaction-driving wetting. However, owing to the complexity of interfacial reactions, they have ambiguous definitions. The reaction-control wetting model and diffusion-control wetting model are established based on typical interfacial behaviors in the brazed alloy/ceramic system. Alloying and modifying ceramic surfaces are the common methods to improve wettability. This article summarizes the research progress of the wetting behaviors of the brazed alloy/ceramic system from the following aspects:characterization and measurement of wettability, wetting mechanism, spreading kinetic models and measures of improving wettability.

Key words: ceramics, wettability, spreading kinetics, contact angle, wetting mechanism

CLC Number: