Controlling interfacial reactions of Ti3SiC2/Ti2AlNb brazed joints by transferring graphene layers

To address the brittle compounds formation issue during the brazing of Ti3SiC2/Ti2AlNb couples, the graphene layer was transferred onto the Ti2AlNb surface prior to the brazing process first. Then the interfacial microstructure of the Ti3SiC2/TiAl joints brazed with and without the transferred graph...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2020-01, Vol.771, p.138624, Article 138624
Main Authors: Sun, Zhan, Ma, Yingkai, Zhang, Bo, Zhang, Lixia
Format: Article
Language:English
Subjects:
Brazing
Graphene
Interfacial reaction
Ti2AlNb
Ti3SiC2
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Summary:To address the brittle compounds formation issue during the brazing of Ti3SiC2/Ti2AlNb couples, the graphene layer was transferred onto the Ti2AlNb surface prior to the brazing process first. Then the interfacial microstructure of the Ti3SiC2/TiAl joints brazed with and without the transferred graphene were put into comparison. The brittle TiSiCu and Ti5Si3 compounds were totally suppressed and the desirable ductile AgCu eutectics were obtained. The shear strength of the joints improved from 70 MPa to 107 MPa. The transfer of the graphene layer can also be extended to other areas as a universal approach, addressing excessive interfacial reactions in future.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2019.138624