Ultrafast low-temperature near-seamless joining of Cf/SiC using a sacrificial Pr3Si2C2 filler via electric current field-assisted sintering technique. Issue 15 (December 2022)

• Record Type: Journal Article
• Authors: Zhou, Xiaobing; Yu, Teng; Xu, Jie; Li, Yang; Huang, Zhengren; Huang, Qing
• Is Part Of: Journal of the European Ceramic Society. Volume 42:Issue 15(2022)
• Page Start: 6865
• Page End: 6875
• Publication Date: 2022-12
• Subjects: Cf/SiC -- Joining -- Pr3Si2C2 -- Electric current field-assisted sintering; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2022.08.026
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: A novel layered structure material, Pr3 Si2 C2, was synthesized at a low temperature of 850 °C using a molten salt approach for the first time, and subsequently used as the joining filler for carbon fibers reinforced SiC composites (Cf /SiC). A robust near-seamless Cf /SiC joint was successfully obtained at 1509 °C (Ti ) for 30 s, while an ultrafast heating rate of 6000 °C/min was applied via electric field-assisted sintering technology. The near-seamless joining process was attributed to the newly precipitated SiC grains, which were densified well with the Cf /SiC matrix by liquid-assisted sintering. The liquid phase was in-situ formed by the eutectic reaction between Pr3 Si2 C2 and SiC. The shear strength of the near-seamless joint obtained at 1509 °C for 30 s was 17.6 ± 3.0 MPa. The failure occurred in the Cf /SiC matrix. The formation of near-seamless Cf /SiC joints dismisses the issues related to thermal mismatch between Cf /SiC matrices and traditional joining fillers.