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The microstructure and mechanical properties of C/C composite/Ti 3 Al alloy brazed joint with graphene nanoplatelet strengthened Ag-Cu-Ti filler

  • Wei Guo
  • , Hongqiang Zhang*
  • , Wenqiang Yuan
  • , Yin Zhu
  • , Hua Zhang
  • , Peng Peng
  • , Bojin Qi
  • , Fei Li
  • *Corresponding author for this work
  • Beihang University
  • Beijing Institute of Petrochemical Technology
  • China Aviation Industry Corporation

Research output: Contribution to journal › Article › peer-review

Abstract

Carbon/carbon (C/C) composite and Ti 3 Al alloy were brazed using graphene nanoplatelet (GNP) strengthened Ag-Cu-Ti composite filler. The brazed joint had the excellent bonding interface, and the microstructure of joint contained TiC, Ti(Cu,Al), GNPs, AlCu 2 Ti phases. Results showed that the GNPs addition could decrease the thickness of TiC layer. GNPs hindered the atom diffusion and inhibited the growth of TiCu phase on the Ti 3 Al alloy side. The shear strength of brazed joint first increased and then decreased with the increase of GNPs content, and the brazed joint reached to the highest shear strength 26.7 MPa when GNPs content was 0.1 wt. %. GNPs could reduce the CTE mismatch between C/C composite and Ti 3 Al alloy, and improve the joint strength due to the relief of residual stress.

Original languageEnglish
Pages (from-to)8783-8789
Number of pages7
JournalCeramics International
Volume45
Issue number7
DOIs
StatePublished - May 2019

Keywords

  • Brazing
  • Carbon/carbon
  • Graphene nanoplatelets
  • Microstructure
  • Shear strength
  • Ti Al alloy

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