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Brazing of SiC ceramics pretreated by chromium coating using inactive AgCu filler metal
Author(s) -
Chen Zubin,
Hu Shengpeng,
Song Xiaoguo,
Lei Yu,
Wang Xinyuan,
Long Weimin,
Feng Jicai
Publication year - 2020
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.13605
Subject(s) - brazing , materials science , ceramic , microstructure , coating , chromium , layer (electronics) , composite material , filler metal , metallurgy , shear strength (soil) , metal , alloy , environmental science , arc welding , welding , soil science , soil water
In this work, chromium coating conducted by magnetron sputtering was introduced to braze SiC ceramics using inactive AgCu filler metal. The results showed that reliable metallurgical bonding of SiC ceramics was obtained at 900°C for 10 minutes. SEM, XRD, and TEM were used to identify the reaction phase in the joint, and the typical interfacial microstructure was SiC/mixed CrSi 2 + Cr 23 C 6 layer/CrSi 2 /Ag(s,s)+Cu(s,s)/CrSi 2 /mixed CrSi 2 + Cr 23 C 6 layer/SiC. The shear strength of SiC joint using chromium coating brazed with inactive AgCu filler metal was 29.6 MPa and the joint fractured at the SiC substrate entirely after shear test. The proposed active element coating method provides a feasible way to achieve the brazing of ceramics.