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Microstructural Evolution and Mechanical Properties of ZrB2-SiC/Cu/Ti/Ti6Al4V Brazing Joints

  • Harbin Institute of Technology
  • Sun Yat-Sen University

Research output: Contribution to journalArticlepeer-review

Abstract

A joint of ZrB2-SiC ceramic to Ti6Al4V alloy was achieved successfully by contact reactive brazing with Ti/Cu lamination. The microstructure and chemical composition of joining interfaces were investigated by electron backscattered diffraction, energy dispersive spectroscopy and X-ray diffraction. The results revealed that ZrB2 had much faster decomposing velocity than SiC in Ti-Cu liquid alloy. Two types of distribution of TiB whiskers were produced on ceramic surface due to different growing conditions. The microstructural evolution with different brazing temperatures was analyzed. The mechanical properties of the joints were evaluated by microhardness and shear tests. The maximum shear strength reached 90.7 MPa with brazing temperature at 920 °C for 10 min.

Original languageEnglish
Pages (from-to)1556-1561
Number of pages6
JournalAdvanced Engineering Materials
Volume17
Issue number11
DOIs
StatePublished - 1 Nov 2015

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