Title: Effect of Ni content and brazing temperature on the self-joining of ZrB₂-SiC

Authors: Jiayin Liu; Jie Zhang; Chunfeng Liu; Tianpeng Wang

Addresses: School of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, China ' School of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, China ' School of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, China ' School of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

Abstract: Pd-Co-Ni filler alloy was adopted to braze ZrB₂-SiC to itself. The reliable ZrB₂-SiC joints were obtained. The effects of Ni content and brazing temperature were investigated on the microstructure and properties of the ZrB₂-SiC joints using SEM and four-point bending method. All the joints consist of diffusion zone in ZrB₂-SiC ceramic, Pd-Si phase, Co-Si phase, and Ni-Co solid solution. During the brazing, Ni and Co can solute into each other, a certain control over the reaction between SiC from the ceramic and Co from the brazing alloy was obtained, which was beneficial for the joint strength.

Keywords: ZrB₂-SiC; Pd-Co-Ni; brazing temperature; microstructure; mechanical properties.

DOI: 10.1504/IJCMSSE.2019.101665

International Journal of Computational Materials Science and Surface Engineering, 2019 Vol.8 No.1, pp.48 - 56

Accepted: 19 Nov 2018
Published online: 20 Aug 2019 *

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