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Microstructures and mechanical properties of C f /LAS composite and Ti60 alloy joints brazed with TiZrNiCu + C f mixed powders
Author(s) -
Xia Long,
Hu Shengpeng,
Yang Hua,
Bian Hong,
Wang Ke,
Huang Xiaoxiao,
Song Xiaoguo
Publication year - 2019
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.13157
Subject(s) - materials science , brazing , microstructure , alloy , composite material , eutectic system , shear strength (soil) , composite number , carbon fibers , ceramic , fiber , metallurgy , environmental science , soil science , soil water
In this paper, carbon fiber reinforced lithium aluminosilicate (LAS) glass‐ceramics matrix composites (C f /LAS composites) are joined to Ti60 alloy using TiZrNiCu + C f mixed powders by proper process parameters. The carbon fibers distribute uniformly in the brazing interlayer and react with Ti, Zr elements in the brazing alloy to form (Ti, Zr)C thin reactive layers, which are between the carbon fibers and the Ti, Zr elements. The effect of C f content on the mechanical properties and microstructure of brazed joints are investigated. The microstructure of brazed joints varied obviously with the increasing of C f content. The thickness of reactive layer between interlayer and C f /LAS composites and Ti solid solution (Ti (s.s)) decrease gradually, and the volume of eutectic structure (Ti(s,s) + (Ti,Zr) 2 (Ni,Cu)) decrease gradually. The obtained brazed joints exhibit a maximum shear strength of 73.5 MPa at room temperature using TiZrNiCu + 0.3 wt% C f mixed powders. The enhanced shear strength can be attributed to the reduction in thermal stress and the reinforcing effect originated from the carbon fiber addition.