期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 43, 期 5, 页码 1777-1789出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2022.12.048
关键词
ZrC-SiC composite; Interface; Mechanical properties; Joining; Microstructure
A reliable full-ceramic interface of ZrC-SiC composite was achieved rapidly at low temperature via pulsed electric current joining. The joint was strengthened by the in-situ formed ceramic interface through multi-cracking, crack deflection and termination. The proposed method provides a practical technology for the rapid joining of ultra-high temperature composites or the construction of layered composites with high toughness at low temperature.
A reliable full-ceramic interface of ZrC-SiC composite was achieved rapidly at low temperature via pulsed electric current joining. Using a Ti foil as joining interlayer, the Zr and Si atoms reacted with Ti to form Ti3Zr3Si3, while the dissolved C precipitated in form of TiC. The current delivering during joining promoted the atomic diffusion and caused the preferential growth of TiC, rapidly achieving a full-ceramic interface at 1300 celcius. Evaluating the reliability by Weibull distribution, the full-ceramic interface exhibited a considerable characteristic strength of 178 MPa, and its reliability was better than the raw ZrC-SiC composite. The in-situ formed ceramic interface toughened the joint via the mechanism of multi-cracking, crack deflection and termination. The proposed method provides a practical technology for the rapid joining of ultra-high temperature composites or the construction of layered composites with high toughness at low temperature.
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