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Interfacial microstructure of Si3N4/Si 3N4 joint brazed using Au-Ni-V filler alloy

  • Harbin Institute of Technology

Research output: Contribution to journalArticlepeer-review

Abstract

By using Au58.74Ni36.50V4.76 at.% filler alloy, a reliable Si 3N4/Si3N4 joint was brazed at 1,423 K for 60 min in vacuum. The microstructure of the joint was investigated and analyzed by scanning electron microscope with energy dispersive spectroscopy, transmission electron microscopy, and X-ray diffraction. The results indicate that the joint consists of three main phases: a continuous VN reaction layer between filler alloy and Si3N4 ceramic; an Au[Ni] solid solution as the matrix of the joint; and Ni[Si,V] solid solution particles distributed homogeneously in the Au[Ni] solid solution. The mechanism of formation of the interfacial structure is discussed.

Original languageEnglish
Pages (from-to)2188-2193
Number of pages6
JournalJournal of Materials Science
Volume45
Issue number8
DOIs
StatePublished - Apr 2010
Externally publishedYes

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