Interface Structure and Formation Mechanism of Directly-Bonded Joints of Silicated Graphite to Fe-based Alloys

J Mater Sci Technol ›› 2007, Vol. 23 ›› Issue (01): 92-96.

• Research Articles • Previous Articles Next Articles

Interface Structure and Formation Mechanism of Directly-Bonded Joints of Silicated Graphite to Fe-based Alloys

Jichun CHEN, Chuanyong HAO, Jinsong ZHANG

Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

Received:2005-09-29 Revised:2006-01-11 Online:2007-01-28 Published:2009-10-10
Contact: Chuanyong HAO

Abstract

Abstract: Commercially available 000Cr30Mo2 ferritic stainless steel and 4J33 ferromagnetic expansion alloy were directly bonded to silicated graphite at 1180-1200℃ and 1100-1150℃, respectively. Interfacial microstructures were examined by scanning electron microscopy, electron probe microanalysis, and X-ray diffraction. The results showed that transient liquid-phase present during bonding promoted the interfacial reactions during bonding. Plenty of brittle chromium carbides, such as (Cr, Fe)7C3 and (Cr2.5Fe4.3Mo0.1)C3, were observed in 000Cr30Mo2/silicated graphite joints. Besides, transverse cracks were also found. In case of 4J33/silicated graphite system, well bonded joints free of defects were obtained.

Key words: Bonding, SiC, Transient liquid-phase, Interfacial microstructure

Jichun CHEN, Chuanyong HAO, Jinsong ZHANG. Interface Structure and Formation Mechanism of Directly-Bonded Joints of Silicated Graphite to Fe-based Alloys[J]. J Mater Sci Technol, 2007, 23(01): 92-96.

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Interface Structure and Formation Mechanism of Directly-Bonded Joints of Silicated Graphite to Fe-based Alloys

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