Microstructures and mechanical properties of Cf/LAS composite and Ti60 alloy joints brazed with TiZrNiCu + Cf mixed powders. Issue 3 (7th January 2019)

• Record Type: Journal Article
• Authors: Xia, Long; Hu, Shengpeng; Yang, Hua; Bian, Hong; Wang, Ke; Huang, Xiaoxiao; Song, Xiaoguo
• Is Part Of: International journal of applied ceramic technology. Volume 16:Issue 3(2019)
• Page Start: 907
• Page End: 916
• Publication Date: 2019-01-07
• Subjects: Cf/LAS composite -- joining -- mechanical properties -- microstructure -- TiZrNiCu + Cf composite filler; Ceramics -- Periodicals; Ceramics -- Technological innovations -- Periodicals; 620.1405
• DOI: 10.1111/ijac.13157
• Languages: English
• ISSNs: 1546-542X

Abstract

Abstract: In this paper, carbon fiber reinforced lithium aluminosilicate (LAS) glass‐ceramics matrix composites (Cf /LAS composites) are joined to Ti60 alloy using TiZrNiCu + Cf 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 Cf content on the mechanical properties and microstructure of brazed joints are investigated. The microstructure of brazed joints varied obviously with the increasing of Cf content. The thickness of reactive layer between interlayer and Cf /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% Cf 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.